Fermi National Accelerator Laboratory
A satellite view of Fermilab. The two circular structures are the Main Injector Ring (smaller) and Tevatron (larger).
EstablishedNovember 21, 1967 (November 21, 1967) (as National Accelerator Laboratory)
Research typeAccelerator physics
Budget$546 million (2019)[1]
Field of research
Accelerator physics
DirectorLia Merminga
AddressP.O. Box 500
LocationWinfield Township, DuPage County, Illinois, United States
41°49′55″N 88°15′26″W / 41.83194°N 88.25722°W / 41.83194; -88.25722
NicknameFermilab
AffiliationsU.S. Department of Energy
University of Chicago
Universities Research Association
Leon Max Lederman
Websitewww.fnal.gov
Map
Fermilab is located in Illinois
Fermilab
Location in Illinois

Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics. Since 2007, Fermilab has been operated by the Fermi Research Alliance (FRA), a joint venture of the University of Chicago, and the Universities Research Association (URA); although in 2023, the Department of Energy (DOE) opened bidding for a new contractor due to concerns about the FRA performance.[2] Fermilab is a part of the Illinois Technology and Research Corridor.

Fermilab's Main Injector, two miles (3.3 km) in circumference, is the laboratory's most powerful particle accelerator.[3] The accelerator complex that feeds the Main Injector is under upgrade, and construction of the first building for the new PIP-II linear accelerator began in 2020.[4] Until 2011, Fermilab was the home of the 6.28 km (3.90 mi) circumference Tevatron accelerator. The ring-shaped tunnels of the Tevatron and the Main Injector are visible from the air and by satellite.

Fermilab aims to become a world center in neutrino physics. It is the host of the multi-billion dollar Deep Underground Neutrino Experiment (DUNE) now under construction.[5] The project has suffered delays and, in 2022, the journals Science and Scientific American each published articles describing the project as "troubled".[6] [7] Ongoing neutrino experiments are ICARUS (Imaging Cosmic and Rare Underground Signals) and NOνA (NuMI Off-Axis νe Appearance). Completed neutrino experiments include MINOS (Main Injector Neutrino Oscillation Search), MINOS+, MiniBooNE and SciBooNE (SciBar Booster Neutrino Experiment) and MicroBooNE (Micro Booster Neutrino Experiment).

On-site experiments outside of the neutrino program include the SeaQuest fixed-target experiment and Muon g-2. Fermilab continues to participate in the work at the Large Hadron Collider (LHC); it serves as a Tier 1 site in the Worldwide LHC Computing Grid.[8] Fermilab also pursues research in quantum information science.[9] It founded the Fermilab Quantum Institute in 2019.[10] Since 2020, it also is home to the SQMS (Superconducting Quantum Materials and Systems) Center.[11]

Asteroid 11998 Fermilab is named in honor of the laboratory.

History

Robert Rathbun Wilson Hall

Weston, Illinois, was a community next to Batavia voted out of existence by its village board in 1966 to provide a site for Fermilab.[12]

The laboratory was founded in 1969 as the National Accelerator Laboratory;[13] it was renamed in honor of Enrico Fermi in 1974. The laboratory's first director was Robert Rathbun Wilson, under whom the laboratory opened ahead of time and under budget. Many of the sculptures on the site are of his creation. He is the namesake of the site's high-rise laboratory building, whose unique shape has become the symbol for Fermilab and which is the center of activity on the campus.

After Wilson stepped down in 1978 to protest the lack of funding for the lab, Leon M. Lederman took on the job. It was under his guidance that the original accelerator was replaced with the Tevatron, an accelerator capable of colliding protons and antiprotons at a combined energy of 1.96 TeV. Lederman stepped down in 1989 and remained Director Emeritus until his death. The science education center at the site was named in his honor.

The later directors are:

Accelerators

The Tevatron

Prior to the startup in 2008 of the Large Hadron Collider (LHC) near Geneva, Switzerland, the Tevatron was the most powerful particle accelerator in the world, accelerating protons and antiprotons to energies of 980 GeV, and producing proton-antiproton collisions with energies of up to 1.96 TeV, the first accelerator to reach one "tera-electron-volt" energy.[17] At 3.9 miles (6.3 km), it was the world's fourth-largest particle accelerator in circumference. One of its most important achievements was the 1995 discovery of the top quark, announced by research teams using the Tevatron's CDF and DØ detectors.[18] It was shut down in 2011.

Fermilab Accelerator Complex

Since 2013, the first stage in the acceleration process (pre-accelerator injector) in the Fermilab chain of accelerators[19] takes place in two ion sources which ionize hydrogen gas. The gas is introduced into a container lined with molybdenum electrodes, each a matchbox-sized, oval-shaped cathode and a surrounding anode, separated by 1 mm and held in place by glass ceramic insulators. A magnetron generates a plasma to form the ions near the metal surface. The ions are accelerated by the source to 35 keV and matched by low energy beam transport (LEBT) into the radio-frequency quadrupole (RFQ) which applies a 750 keV electrostatic field giving the ions their second acceleration. At the exit of RFQ, the beam is matched by medium energy beam transport (MEBT) into the entrance of the linear accelerator (linac).[20]

The next stage of acceleration is linear particle accelerator (linac). This stage consists of two segments. The first segment has five drift tube cavities, operating at 201 MHz. The second stage has seven side-coupled cavities, operating at 805 MHz. At the end of linac, the particles are accelerated to 400 MeV, or about 70% of the speed of light.[21][22] Immediately before entering the next accelerator, the H− ions pass through a carbon foil, becoming H+ ions (protons).[23]

The resulting protons then enter the booster ring, a 468 m (1,535 ft) circumference circular accelerator whose magnets bend beams of protons around a circular path. The protons travel around the Booster about 20,000 times in 33 milliseconds, adding energy with each revolution until they leave the Booster accelerated to 8 GeV.[23] In 2021, the lab announced that its latest superconducting YBCO magnet could increase field strength at a rate of 290 tesla per second, reaching a peak magnetic field strength of around 0.5 tesla.[24]

The final acceleration is applied by the Main Injector [circumference 3,319.4 m (10,890 ft)], which is the smaller of the two rings in the last picture below (foreground). Completed in 1999, it has become Fermilab's "particle switchyard" in that it can route protons to any of the experiments installed along the beam lines after accelerating them to 120 GeV. Until 2011, the Main Injector provided protons to the antiproton ring [circumference 6,283.2 m (20,614 ft)] and the Tevatron for further acceleration but now provides the last push before the particles reach the beam line experiments.

Proton improvement plan

Recognizing higher demands of proton beams to support new experiments, Fermilab began to improve their accelerators in 2011. Expected to continue for many years,[28] the project has two phases: Proton Improvement Plan (PIP) and Proton Improvement Plan-II (PIP-II).[29]

PIP (2011–2018)

The overall goals of PIP are to increase the repetition rate of the Booster beam from 7 Hz to 15 Hz and replace old hardware to increase reliability of the operation.[29] Before the start of the PIP project, a replacement of the pre-accelerator injector was underway. The replacement of almost 40 year-old Cockcroft–Walton generators to RFQ started in 2009 and completed in 2012. At the Linac stage, the analog beam position monitor (BPM) modules were replaced with digital boards in 2013. A replacement of Linac vacuum pumps and related hardware is expected to be completed in 2015. A study on the replacement of 201 MHz drift tubes is still ongoing. At the boosting stage, a major component of the PIP is to upgrade the Booster ring to 15 Hz operation. The Booster has 19 radio frequency stations. Originally, the Booster stations were operating without solid-state drive system which was acceptable for 7 Hz but not 15 Hz operation. A demonstration project in 2004 converted one of the stations to solid state drive before the PIP project. As part of the project, the remaining stations were converted to solid state in 2013. Another major part of the PIP project is to refurbish and replace 40 year-old Booster cavities. Many cavities have been refurbished and tested to operate at 15 Hz. The completion of cavity refurbishment is expected in 2015, after which the repetition rate can be gradually increased to 15 Hz operation. A longer term upgrade is to replace the Booster cavities with a new design. The research and development of the new cavities is underway, with replacement expected in 2018.[28]

PIP-II
Prototypes of SRF cavities to be used in the last segment of PIP-II Linac[30]

The goals of PIP-II include a plan to delivery 1.2 MW of proton beam power from the Main Injector to the Deep Underground Neutrino Experiment target at 120 GeV and the power near 1 MW at 60 GeV with a possibility to extend the power to 2 MW in the future. The plan should also support the current 8 GeV experiments including Mu2e, Muon g−2, and other short-baseline neutrino experiments. These require an upgrade to the Linac to inject to the Booster with 800 MeV. The first option considered was to add 400 MeV "afterburner" superconducting Linac at the tail end of the existing 400 MeV. This would have required moving the existing Linac up 50 metres (160 ft). However, there were many technical issues with this approach. Instead, Fermilab is building a new 800 MeV superconducting Linac to inject to the Booster ring.

Construction of the first building for the PIP-II accelerator began in 2020.[4] The new Linac site will be located on top of a small portion of Tevatron near the Booster ring in order to take advantage of existing electrical and water, and cryogenic infrastructure. The PIP-II Linac will have low energy beam transport line (LEBT), radio frequency quadrupole (RFQ), and medium energy beam transport line (MEBT) operated at the room temperature at with a 162.5 MHz and energy increasing from 0.03 MeV. The first segment of Linac will be operated at 162.5 MHz and energy increased up to 11 MeV. The second segment of Linac will be operated at 325 MHz and energy increased up to 177 MeV. The last segment of linac will be operated at 650 MHz and will have the final energy level of 800 MeV.[31]

As of 2022, the estimated PIP-II accelerator start date for the accelerator is 2028.[32] The project was approved for construction in April 2022 with an expected cost to the Department of Energy of $978M and with an additional $330M in contributions from international partners.[33]

Experiments

Discoveries by Fermilab experiments

The following particles were first directly observed at Fermilab:

Fermilab's CDF detector

In 1999, physicists at on the KTeV experiment were also the first to observe direct CP violation in kaon decays.[38]

The DØ experiment and CDF experiment each made important contributions to the observation of the Higgs Boson, announced in 2012.[39]

Evolution of the post-Tevatron experimental program

Fermilab dismantled the CDF (Collider Detector at Fermilab)[40] experiment to make the space available for IARC (Illinois Accelerator Research Center).[41]

Fermilab physicists continue to play a key role in the world-wide collider program. The LHC Physics Center (LPC) at Fermilab is a regional center of the Compact Muon Solenoid Collaboration (the experiment is housed at CERN). The LPC offers a vibrant community of CMS scientists from the US and plays a major role in the CMS detector commissioning, and in the design and development of the detector upgrade.[42] Fermilab is the host laboratory for USCMS,[43] which includes researchers from 50 U.S. universities including 715 students. Fermilab hosts the largest CMS Tier 1 computing center, handling approximately 40% of global CMS Tier 1 computing requests. On February 9, 2022, Fermilab's Patricia McBride (physicist) was elected spokesperson of the CMS collaboration.[44]

During this time-frame, the laboratory also established a new program in research in cutting-edge information science, including the development of quantum teleportation technology[45] for the quantum internet and increasing the lifetime of superconducting resonators[46] for use in quantum computers.

On-site program in the 2020s

The on-site program in the 2020s is largely focused on the ``Intensity Frontier of particle physics, especially neutrino physics and rare physics searches using muons. A program exploring nucleon structure is also continuing.

List of recent past, ongoing, and planned experiments running on-site

LBNF/DUNE

Fermilab strives to become the world leader in neutrino physics through the Deep Underground Neutrino Experiment at the Long Baseline Neutrino Facility. Other leaders are CERN, which leads in Accelerator physics with the Large Hadron Collider (LHC), and Japan, which has been approved to build and lead the International Linear Collider (ILC). Fermilab will be the site of LBNF's future beamline, and the Sanford Underground Research Facility (SURF), in Lead, SD, is the site selected to house the massive far detector. The term "baseline" refers to the distance between the neutrino source and the detector. The far detector current design is for four modules of instrumented liquid argon with a fiducial volume of 10 kilotons each.

According to the 2016 Conceptual Design Report, the first two modules were expected to be complete in 2024, with the beam operational in 2026. The final modules were planned to be operational in 2027.[59] In 2022, the cost for two far detector modules and the beam, alone, had risen to $3B. This led to a decision by the Department of Energy Office of Science to phase the experiment.[6] Phase I would consist of two modules, to be completed in 2028-29, and the beamline, to be completed in 2032. The installation of phase II, the remaining two far detector modules, is not yet planned and will be at a cost above the $3B estimate for phase I.[6]

A large prototype detector constructed at CERN took data with a test beam from 2018-2020. The results show that ProtoDUNE performed with greater than 99% efficiency.[60]

LBNF/DUNE program in neutrino physics plans to measure fundamental physical parameters with high precision and to explore physics beyond the Standard Model. The measurements DUNE will make are expected to greatly increase the physics community's understanding of neutrinos and their role in the universe, thereby better elucidating the nature of matter and anti-matter. It will send the world's highest-intensity neutrino beam to a near detector on the Fermilab site and the far detector 800 miles (1300 km) away at SURF.

About other neutrino experiments

The MiniBooNE detector was a 40-foot (12 m) diameter sphere containing 800 tons of mineral oil lined with 1,520 phototube detectors. An estimated 1 million neutrino events were recorded each year. SciBooNE sat in the same neutrino beam as MiniBooNE but had fine-grained tracking capabilities. The NOνA experiment uses, and the MINOS experiment used, Fermilab's NuMI (Neutrinos at the Main Injector) beam, which is an intense beam of neutrinos that travels 455 miles (732 km) through the Earth to the Soudan Mine in Minnesota and the Ash River, Minnesota, site of the NOνA far detector. In 2017, the ICARUS neutrino experiment was moved from CERN to Fermilab.[61][62]

Muon g−2

Muon g−2: (pronounced “gee minus two”) is a particle physics experiment to measure the anomaly of the magnetic moment of a muon to a precision of 0.14 ppm, which will be a sensitive test of the Standard Model.

Muon g−2 building (white and orange) which hosts the magnet

Fermilab is continuing an experiment conducted at Brookhaven National Laboratory to measure the anomalous magnetic dipole moment of the muon.

The magnetic dipole moment (g) of a charged lepton (electron, muon, or tau) is very nearly 2. The difference from 2 (the "anomalous" part) depends on the lepton, and can be computed quite exactly based on the current Standard Model of particle physics. Measurements of the electron are in excellent agreement with this computation. The Brookhaven experiment did this measurement for muons, a much more technically difficult measurement due to their short lifetime, and detected a tantalizing, but not definitive, 3 σ discrepancy between the measured value and the computed one.

The Brookhaven experiment ended in 2001, but 10 years later Fermilab acquired the equipment,[63] and is working to make a more accurate measurement (smaller σ) which will either eliminate the discrepancy or, hopefully, confirm it as an experimentally observable example of physics beyond the Standard Model.

Transportation of the 600 ton magnet to Fermilab

Central to the experiment is a 50 foot-diameter superconducting magnet with an exceptionally uniform magnetic field. This was transported, in one piece, from Brookhaven in Long Island, New York, to Fermilab in the summer of 2013. The move traversed 3,200 miles over 35 days, mostly on a barge down the East Coast and up the Mississippi.

The magnet was refurbished and powered on in September 2015,[64] and has been confirmed to have the same 1300 ppm (0.13%) p-p basic magnetic field uniformity that it had before the move.[65]: 4 

The project worked on shimming the magnet to improve its magnetic field uniformity.[65] This had been done at Brookhaven,[66] but was disturbed by the move and had to be re-done at Fermilab.

In 2018, the experiment started taking data at Fermilab.[67] In 2021, the laboratory reported that results from initial study involving the particle challenged the Standard Model, with the potential for discovery of new forces and particles.[68][69]

In August 2023, the Fermilab group said they may be getting closer to proving the existence of a new force of nature. They have found more evidence that sub-atomic particles, called muons, are not behaving in the way predicted by the current theory of sub-atomic physics.[70]

Delays, cost overruns, safety failures and management turmoil in the 2010s and 2020s

Starting in the 2010s, delays and cost over-runs led to substantial concerns about mismanagement of the laboratory.

Oversight issues that developed from 2014–2022

In 2014, the Particle Physics Project Prioritization Panel ("P5") recommended[71] three major initiatives for construction on the Fermilab site. Two were particle physics experiments: the Deep Underground Neutrino Experiment and Mu2e. The third was the PIPII accelerator upgrade described above. Also, P5 recommended Fermilab participation in LHC at CERN.

As of 2022, two P5-recommended Fermilab projects had suffered substantial delays:

  • The Deep Underground Neutrino Experiment with the enabling Long Baseline Neutrino Facility was proposed to P5 as a $1B project; the cost estimate in 2021 dollars was more than $3B, with far detector operations beginning 2029 and full operation by 2032.[72]
  • The Mu2e experiment was to produce preliminary results in 2020,[73] but this is now delayed until 2026.[74]

Even smaller experiments, below the cost-level of individual P5 approval, that were proposed at the time of the 2014 P5 suffered considerable delay. The Short-Baseline Near Detector (SBND) that was proposed in 2014 [75] with a $10M cost scale was originally scheduled for data taking in spring 2018,[76] but is now scheduled to begin in autumn 2023.[75]

The Department of Energy raised flags as early as Fiscal Year (FY) 2019. Each year, the US Department of Energy Office of Science reviews and grades the national laboratories in its portfolio on eight performance metrics.[77] Fermilab has received the lowest grades among the national laboratories in FY2019, 2020, 2021 and 2022. A rare C grade was assigned for project management in 2021, reflective of the delays and cost overruns.[78] In an article in the journal Science, James Decker, who was principal deputy director of DOE’s Office of Science from 1973 to 2007, stated that the performance evaluation for 2021 was "one of the most scathing I have seen".[2]

Also, in 2020, the high-energy physics community expressed concern that the cost of major projects at Fermilab have led to diversion of funds from the high-energy physics core research program, harming the health of the field.[79][80] Congress increased the annual HEP budget from less than $800 million by about $250M to more than $1 billion—a 30% increase that went mainly to support large projects at Fermilab.[81]

Oversight issues continuing since 2022

The Fermilab project delays led to substantial change in leadership in 2022.[6] In September, 2021, Nigel Lockyer, Director of Fermilab, resigned.[82] Lockyer was replaced by Lia Merminga, head of the PIP II project.[83] On March 31, 2022, James Siegrist, Associate Director for High Energy Physics in the Department of Energy Office of Science, who had overseen the response to the P5 report, stepped down.[84] In September 2022, it was announced that Deputy Director for Research Joseph Lykken would step down, to be replace by Yale Professor Bonnie Fleming, who previously served as Deputy Chief Research Officer for the neutrino program at Fermilab.[85] Regina (Gina) Rameika joined the DOE’s Office of Science as the Associate Director for the Office of High Energy Physics in his place on November 7, 2022, moving from her role as spokesperson of the DUNE Experiment.[86]

Although these replacements represent a substantial turn-over of the top ranks, the new management was drawn from the 2014-2022 management team and Fermilab has continued to suffer turmoil since this change-over. In particular, new issues arose with regard to safety and access of employees, visitors and contractors.

On May 25, 2023, a contractor fell 23 ft while attempting to secure reinforcing bars on a wall for the new PIP II project site.[87] The contactor was air-lifted to the hospital in an accident considered the worst on site in decades.[88] A DOE-appointed Accident Investigation Board concluded that the incident was preventable and "recommended a long list of managerial and safety controls needed to prevent a recurrence of such an accident."[87] As a result of the accident, the $1B PIP II project that is crucial for the success of the DUNE Experiment has been delayed.[87]

On Sept. 1, 2023, Chief Research Officer Bonnie Fleming announced that the Fermilab accelerator system was temporarily shut down for safety reasons.[89] On Sept. 9, 2022, DOE issued order DOE O 420.2D entitled “Safety of Accelerators”. This document establishes the accelerator-specific safety requirements for DOE-funded accelerators and their operations. Fermilab management had one year to comply with the order, but did not meet the requirements in that timeframe. The Fermilab Main Accelerator will resume running when the DOE O 420.2D implementation is complete, with the earliest estimate being March, 2024.

In view of the many issues facing the laboratory, in January 2023, the DOE announced a process to rebid the contract for the management of the laboratory[90] due to the performance issues.[2] The DOE announcement of the competition explained: "the purpose of this contract competition is to solicit and award a new M&O contract that will result in improved contractor performance and efficiencies at FNAL. DOE expects that this competition will elicit new and innovative approaches for planning the Laboratory’s future."[91] At an informational meeting for potential bidders on March 1, 2023, the presentation slides expanded upon issues under "Major Challenges/Risks" including highlighting the concern: "The Laboratory continues to have challenges in Financial Management and Acquisition Management. Audits repeatedly highlight the same deficiencies and control failures year after year. Any corrective actions implemented have resulted in little to no progress. Significant procurement issues have hindered the laboratory’s ability to successfully deliver efficient and effective business systems/resources to enable the Science Mission. Substantial concerns remain regarding the ability to expend Government funds in an effective, efficient, and compliant manner."[92]

Site

Access

Fermilab was founded in 1967 as an open-access laboratory, and, to this day, does not host classified research. For 50 years, both scientists and the public could easily access the site for research, educational activities, arts programs, and recreation.

In the late 2010s and early 2020s, the management of Fermilab began to introduce severe restrictions on access to the Fermilab site by the public and by scientists. By spring 2023, the restrictions had become so onerous that more than 2500 physicists and visitors to the laboratory signed an “open petition to elected representatives to reopen Fermilab.”[93] The petition stated that: “The access policy changes undermine critical aspects of the scientific process as well as the basic functioning of Fermilab. Hosting research meetings, interviewing prospective employees, collaborating with scientists outside the lab, and enacting our famously impactful education programs have all been hindered.“ With respect to the general public, the petition stated: “Today, the general public is only permitted to access the main road, and with ID requirements that are becoming increasingly stringent, soon its doors will be closed to tourists and even to some immigrants. We can no longer drive or bike around the premises freely. The dog park, Wilson Hall with its exhibits on the top floor, and other areas are no longer generally accessible. Fishing and other activities open to the public have been canceled.” The petition emphatically requested that access policies be reverted to the open laboratory model that governed the laboratory prior to 2020.

In May 2023, Director Lia Merminga posted a response to the petition on the Fermilab website,[94] noting that some areas on site remain open to the public during specific hours with ID access requirements. Merminga's response justifies the new restrictions because the lab "manage[s] a large amount of non-public information"---reasoning that conflicts with the petition that points out that the lab is fully tax-payer funded, does no classified research, and has a government mandate to publish all of its scientific results. Further coverage of the petition and the management response appeared in the magazines Physics Today[95] and Physics World.[96]

All adult visitors entering the site must present a government-issued photo ID compliant with the Real ID Act.[97] Up-to-date specifics about access can be found on the Fermilab website.[98]

Architecture

Interior of Wilson Hall

Fermilab's first director, Robert Wilson, insisted that the site's aesthetic complexion not be marred by a collection of concrete block buildings. The design of the administrative building (Wilson Hall) was inspired by St. Pierre's Cathedral in Beauvais, France,[99] though it was realized in a Brutalist style. Several of the buildings and sculptures within the Fermilab reservation represent various mathematical constructs as part of their structure.

The Archimedean Spiral is the defining shape of several pumping stations as well as the building housing the MINOS experiment. The reflecting pond at Wilson Hall also showcases a 32-foot-tall (9.8 m) hyperbolic obelisk, designed by Wilson. Some of the high-voltage transmission lines carrying power through the laboratory's land are built to echo the Greek letter π. One can also find structural examples of the DNA double-helix spiral and a nod to the geodesic sphere.

Wilson's sculptures on the site include Tractricious, a free-standing arrangement of steel tubes near the Industrial Complex constructed from parts and materials recycled from the Tevatron collider, and the soaring Broken Symmetry, which greets those entering the campus via the Pine Street entrance.[100] Crowning the Ramsey Auditorium is a representation of the Möbius strip with a diameter of more than 8 feet (2.4 m). Also scattered about the access roads and village are a massive hydraulic press and old magnetic containment channels, all painted blue.

Wildlife

In 1967, Wilson brought five American bison to the site, a bull and four cows, and an additional 21 were provided by the Illinois Department of Conservation.[101][102] Some fearful locals believed at first that the bison were introduced in order to serve as an alarm if and when radiation at the laboratory reached dangerous levels, but they were assured by Fermilab that this claim had no merit. Today, the Fermilab bison herd is a popular attraction that draws many visitors[103] and the grounds are also a sanctuary for other local wildlife populations.[104][105] A Christmas Bird Count has occurred at the lab every year since 1976.[106]

Working with the Forest Preserve District of DuPage County, Fermilab has introduced barn owls to selected structures around the grounds.[107]

Tritium on site

During running, particle beams produce tritium, an isotope of hydrogen consisting of a proton and two neutrons that is weakly radioactive with a half-life of 12.3 years. This can bind with oxygen to form tritiated water. Tritium levels measured on site are low compared to federal health and environmental standards. Fermilab monitors tritium leaving the site in surface and sewer water, and provides a useful FAQ sheet for those who want to learn more.[108]

At an informational meeting for potential bidders for the management contract, held on March 1, 2023, the presentation slides indicated that although the rate of tritium leaving site is below the required standards, there is sufficient tritium contamination on site to represent a "challenge".[92] In particular, tritium produced in the NuMI beamline that send neutrinos to experiments in Minnesota has been pumped into the industrial water cooling system that is used for equipment across the Fermilab campus. As a result, it is concluded that now "tritium contamination is largely throughout the research complex."[92]

See also

References

  1. ↑ "DOE FY20 Budget Justification". Retrieved 2019-10-20.
  2. 1 2 3 Cho, Adrian (22 March 2023). "Major shake-up coming for Fermilab, the troubled U.S. particle physics center". Science. Retrieved 23 March 2023.
  3. ↑ Brown, Bruce. "Current and Future High Power Operation of Fermilab Main Injector". Researchgate. Retrieved 25 February 2021.
  4. 1 2 Biron, Lauren (22 July 2020). "Two construction projects reach major milestones at Fermilab". Fermilab. United States Government. Retrieved 25 February 2021.
  5. ↑ "HEP Project Status, Mike Procario" (PDF). High Energy Physics Advisory Panel November 1–2, 2021 Agenda.
  6. 1 2 3 4 Adrian Cho (March 29, 2022). "Trying to stay ahead of competition, U.S. pares down troubled $3 billion neutrino experiment". Science, American Association for the Advancement of Science.
  7. ↑ Lewton, Thomas (April 13, 2022). "Troubled U.S. Neutrino Project Faces Uncertain Future–and Fresh Opportunities". Scientific American. Retrieved 13 April 2022.
  8. ↑ National Science Foundation. "The US and LHC Computing". Archived from the original on 2011-01-10. Retrieved 2011-01-11.
  9. ↑ Caine, Paul (1 September 2020). "Argonne, Fermilab at Forefront of 'Transformational' Quantum Research". WTTW. Retrieved 9 March 2021.
  10. ↑ Salles, Andre (18 November 2019). "Fermilab launches new institute for quantum science". Fermilab. United States Government. Retrieved 9 March 2021.
  11. ↑ Biron, Lauren (26 August 2020). "White House Office of Technology Policy, National Science Foundation and Department of Energy announce over $1 billion in awards for artificial intelligence and quantum information science research institutes". Fermilab. United States Government. Retrieved 9 March 2021.
  12. ↑ Fermilab. "Before Weston". Archived from the original on 2010-03-05. Retrieved 2009-11-25.
  13. ↑ Kolb, Adrienne (19 May 2017). "The founding of Fermilab". Cern Courier. Retrieved 25 February 2021.
  14. ↑ "Fermilab director Oddone announces plan to retire next year". The Beacon-News. August 2, 2012. Archived from the original on 4 October 2013. Retrieved 10 July 2013.
  15. ↑ "New Fermilab director named". Crain's Chicago Business. June 21, 2013. Archived from the original on 14 November 2017. Retrieved 10 July 2013.
  16. ↑ "Lia Merminga appointed director of Fermi National Accelerator Laboratory". Fermilab News. April 5, 2022. Retrieved 16 April 2022.
  17. ↑ Shiltsev, Vladimir (2012). "Achievements and Lessons from Tevatron". arXiv:1205.0536 [physics.acc-ph].
  18. ↑ Bandurin, Dmitry; et al. (2015). "Review of physics results from the Tevatron". International Journal of Modern Physics A. 30 (6). arXiv:1409.4861. Bibcode:2015IJMPA..3041001B. doi:10.1142/S0217751X15410018. S2CID 118699490.
  19. ↑ "Animation of Fermilab's Accelerator Complex". YouTube. Fermilab. Archived from the original on 2021-12-11. Retrieved 25 February 2021.
  20. ↑ Carneiro, J.P.; Garcia, F.G.; Ostiguy, J.-F.; Saini, A.; Zwaska, R. (13 Nov 2014). Transmission efficiency measurement at the FNAL 4-rod RFQ (FERMILAB-CONF-14-452-APC) (PDF). 27th International Linear Accelerator Conference (LINAC14). pp. 168–170. arXiv:1411.3614. Bibcode:2014arXiv1411.3614C. ISBN 978-3-95450-142-7. Archived (PDF) from the original on 23 April 2016. Retrieved 12 August 2015.
  21. 1 2 3 "Fermilab Linac Slide Show Description". Fermilab. Archived from the original on 18 April 2016. Retrieved 12 August 2015.
  22. ↑ Kubik, Donna (2005). Fermilab (PDF). Archived (PDF) from the original on 22 April 2016. Retrieved 12 August 2015.
  23. 1 2 "Accelerator". Fermilab. Archived from the original on 4 August 2015. Retrieved 12 August 2015.
  24. ↑ Lavars, Nick (2021-12-02). "Next-gen particle accelerator magnet ramps up at record speed". New Atlas. Retrieved 2021-12-02.
  25. 1 2 "35 years of H− ions at Fermilab" (PDF). Fermilab. Archived (PDF) from the original on 18 October 2015. Retrieved 12 August 2015.
  26. ↑ May, Michael P.; Fritz, James R.; Jurgens, Thomas G.; Miller, Harold W.; Olson, James; Snee, Daniel (1990). Mechanical construction of the 805 MHz side couple cavities for the Fermilab Linac upgrade (PDF). Linear Accelerator Conference. Proceedings of the 1990 Linear Accelerator Conference. Albuquerque, New Mexico, USA. Archived (PDF) from the original on 7 July 2015. Retrieved 13 August 2015.
  27. ↑ "Wilson Hall & vicinity". Fermilab. Archived from the original on 17 September 2015. Retrieved 12 August 2015.
  28. 1 2 "FNAL – The Proton Improvement Plan (PIP)" (PDF). Proceedings of IPAC2014. 5th International Particle Accelerator Conference. Dresden, Germany. 2014. pp. 3409–3411. ISBN 978-3-95450-132-8. Archived (PDF) from the original on 26 June 2015. Retrieved 15 August 2015.
  29. 1 2 Holmes, Steve (16 December 2013). MegaWatt Proton Beams for Particle Physics at Fermilab (PDF) (Report). Fermilab. Archived from the original (PDF) on 5 September 2015. Retrieved 15 August 2015.
  30. ↑ Awida, M.H.; Foley, M.; Gonin, I.; Grassellino, A.; Grimm, C.; Khabiboulline, T.; Lunin, A.; Rowe, A.; Yakovlev, V. (September 2014). Development of 5 Cell Beta=0.9 650 MHz Cavities for Project X (PDF). 27th Linear Accelerator Conference (LINAC2014). Geneva, Switzerland. pp. 171–173. ISBN 978-3-95450-142-7. Archived (PDF) from the original on 2 July 2015. Retrieved 16 August 2015.
  31. ↑ Proton Improvement Plan II (Report). Fermilab. 12 December 2013. Archived from the original on 22 April 2016. Retrieved 15 August 2015.
  32. ↑ "PIP-II: An international effort breaking new ground in particle physics". Innovation News Network. March 4, 2022.
  33. ↑ Thomas, Will (April 25, 2022). "Fermilab Accelerator Upgrade Moves Into Construction Phase". FYI: American Institute of Physics.
  34. ↑ Johnson, George (March 5, 1995). "Physicists Weigh In: The Quark Is a Porker". New York Times. Retrieved 30 April 2022.
  35. ↑ "Discovery of the bottom quark, Upsilon". history.fnal.gov. Fermilab History and Archives Project. Retrieved 10 July 2021.
  36. ↑ Jackson, Judy (July 20, 2000). "Physicists Find First Direct Evidence for Tau Neutrino at Fermilab". Fermilab News. Retrieved 30 April 2022.
  37. ↑ "Fermilab physicists discover "doubly strange" particle". Fermilab. 9 September 2008. Archived from the original on 5 September 2008.
  38. ↑ O'Boyle, LuAnne (March 1, 1999). "Fermilab Physicists Find New Matter-Antimatter Asymmetry". Fermilab News. Retrieved 30 April 2022.
  39. ↑ Kurt, Reisselmann (July 2, 2012). "Tevatron scientists announce their final results on the Higgs particle". Fermilab News. Retrieved 30 April 2022.
  40. ↑ Ayshford, Emily (30 January 2019). "Retired equipment lives on in new physics experiments". Symmetry. Retrieved 25 February 2021.
  41. ↑ Kroc, Thomas (2017). "Illinois Accelerator Research Center". Physics Procedia. 90: 92. arXiv:1705.00073. Bibcode:2017PhPro..90...92K. doi:10.1016/j.phpro.2017.09.030. S2CID 113419509.
  42. ↑ "LHC Physics Center". lpc.fnal.gov. Retrieved 12 November 2019.
  43. ↑ "USCMS web page".
  44. ↑ "Fermilab's Patty McBride elected next CMS spokesperson". 3 March 2022.
  45. ↑ Valivarthi, Raju; et al. (2020). "Teleportation Systems Toward a Quantum Internet". PRX Quantum. 1 (2): 020317. arXiv:2007.11157. Bibcode:2020PRXQ....1b0317V. doi:10.1103/PRXQuantum.1.020317. S2CID 220686903.
  46. ↑ Romanenko, A; et al. (March 2020). "Three-Dimensional Superconducting Resonators at T < 20 mK with Photon Lifetimes up to τ = 2 s". Physical Review Applied. 13 (3): 034032. arXiv:1810.03703. Bibcode:2020PhRvP..13c4032R. doi:10.1103/PhysRevApplied.13.034032.
  47. ↑ "ANNIE". Fermilab. Fermi National Accelerator Laboratory. Retrieved 2 July 2023.
  48. ↑ "LBNF/DUNE: An international flagship neutrino experiment". Fermilab. Retrieved 7 June 2019.
  49. ↑ "ICARUS". Fermilab. Fermi National Accelerator Laboratory. Retrieved 2 July 2023.
  50. ↑ "Intensity Frontier | MiniBooNE". Fermilab. Retrieved 7 June 2019.
  51. ↑ "MicroBooNE Collaboration". Fermilab. Retrieved 7 June 2019.
  52. ↑ "MINERvA: Bringing neutrinos into sharp focus". Fermilab. Retrieved 7 June 2019.
  53. ↑ "Mu2e: muon-to-electron-conversion experiment". Mu2e Fermilab. Retrieved 7 June 2019.
  54. ↑ "Muon g-2 Experiment". Muon-g-2 Fermilab. Retrieved 7 June 2019.
  55. ↑ "NOvA Experiment". NOvA Experiment Fermilab. Retrieved 7 June 2019.
  56. ↑ "Argonne Physics Division - E-906/SeaQuest". www.phy.anl.gov. Retrieved 7 June 2019.
  57. ↑ Machado, Pedro (2019). "The Short-Baseline Neutrino Program at Fermilab". Annual Review of Nuclear and Particle Science. 69: 363–387. arXiv:1903.04608. Bibcode:2019ARNPS..69..363M. doi:10.1146/annurev-nucl-101917-020949. S2CID 119088967.
  58. ↑ "SpinQuest". Fermilab. Fermi National Accelerator Laboratory. Retrieved 2 July 2023.
  59. ↑ Acciarri, R.; et al. (2016). "Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 1: The LBNF and DUNE Projects". arXiv:1601.05471 [physics.ins-det].
  60. ↑ Abi, B; et al. (3 December 2020). "First results on ProtoDUNE-SP liquid argon time projection chamber performance from a beam test at the CERN Neutrino Platform". Journal of Instrumentation. 15 (12): P12004. arXiv:2007.06722. Bibcode:2020JInst..15P2004A. doi:10.1088/1748-0221/15/12/P12004.
  61. ↑ "ICARUS neutrino experiment to move to Fermilab". April 22, 2015.
  62. ↑ Steffel, Catherine N. (March 2, 2020). "ICARUS prepares to chase a fourth neutrino". symmetrymagazine.org. Retrieved March 3, 2020.
  63. ↑ Ruppel, Emily (30 September 2011). "Physics Phoenix: Plotting the Journey of Muon g–2". Brookhaven National Laboratory. Archived from the original on 8 December 2015.
  64. ↑ Lord, Steve (26 September 2015). "Fermilab brings super magnet to life after 10 years". Aurora Beacon-News. Archived from the original on 8 December 2015 – via Chicago Tribune.
  65. 1 2 Kiburg, Brendan (26 October 2015). G-2 Report (PDF) (Report). Archived (PDF) from the original on 8 December 2015. Retrieved 2015-12-05.
  66. ↑ Redin, S.I. (1999). "Magnetic Field shimming, Measurement and Control for the BNL Muon (g-2) Experiment" (PDF). Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366). 1999 Particle Accelerator Conference. Vol. 5. New York. pp. 3167–3169. doi:10.1109/PAC.1999.792238. ISBN 0-7803-5573-3. Archived (PDF) from the original on 2015-12-07.
  67. ↑ Martin, Bruno (6 February 2018). "Fermilab's Muon g-2 experiment officially starts up". Fermilab. United States Government. Retrieved 25 February 2021.
  68. ↑ Overbye, Dennis (April 7, 2021). "Finding From Particle Research Could Break Known Laws of Physics - It's not the next Higgs boson — yet. But the best explanation, physicists say, involves forms of matter and energy not currently known to science". The New York Times. Retrieved April 7, 2021.
  69. ↑ Marc, Tracy (April 7, 2021). "First results from Fermilab's Muon g-2 experiment strengthen evidence of new physics". Fermilab. Retrieved April 7, 2021.
  70. ↑ "Scientists at Fermilab close in on fifth force of nature". BBC News. 2023-08-10. Retrieved 2023-08-11.
  71. ↑ Report of the Particle Physics Project Prioritization Panel (PDF), May 2014
  72. ↑ "LBNF/DUNE Status" (PDF).
  73. ↑ "Mu2e: muon-to-electron-conversion experiment". Fermilab. April 21, 2015. Retrieved 30 April 2015.
  74. ↑ Bernstein, Maxwell (March 24, 2022). "Straws, crystals and the quest for new subatomic physics". Fermilab News.
  75. 1 2 Ayshford, Emily (December 2022). "Neutrino Detector On the Move". Fermilab News. Fermi National Accelerator Laboratory. Retrieved 26 December 2022.
  76. ↑ Wilson, Peter (15 December 2015). "SBN Program Coordinator". Director’s Progress Review of the SBN Program, 15 December 2015. Fermilab. Retrieved 26 December 2022.
  77. ↑ "Laboratory Appraisal Process". U.S. Department of Energy Office of Science. 13 December 2022. Retrieved 22 December 2022.
  78. ↑ "Fermi National Accelerator Laboratory FY 2021 Report Card". Laboratory Appraisal Process. Office of Science, Department of Energy. 20 December 2021. Retrieved 26 December 2022.
  79. ↑ "2020 HEPAP COV Report on HEP Program" (PDF). Department of Energy Office of Science.
  80. ↑ Will Thomas (December 16, 2020). "Particle Physicists Feel Squeeze From Major Projects". FYI, American Institute of Physics.
  81. ↑ William Thomas (November 21, 2021). "US high-energy physics faces compounding budget tensions". Physics Today. 2021 (2): 1119a. Bibcode:2021PhT..2021b1119.. doi:10.1063/PT.6.2.20211119a. S2CID 244441879.
  82. ↑ "Nigel Lockyer to step down as Fermilab director". Fermilab News. 10 September 2021.
  83. ↑ "Lia Merminga appointed director of Fermi National Accelerator Laboratory". Fermilab News. 5 April 2022.
  84. ↑ Will Thomas (7 February 2022). "DOE High Energy Physics Program Head to Retire". FYI, American Institute of Physics.
  85. ↑ "Groundbreaking particle physicist named Fermilab chief research officer and deputy director, UChicago professor". University of Chicago. Physical Sciences. 7 September 2022. Retrieved 19 September 2023.
  86. ↑ Berhe, Asmeret Asefaw. "SC's New Associate Director for High Energy Physics". Office of Science. Department of Energy. Retrieved 26 December 2022.
  87. 1 2 3 Channick, Robert (14 September 2023). "Fermilab's $1 billion accelerator project remains on hold during investigation into May accident that injured a construction worker". Tribune Publishing. Chicago Tribune. Retrieved 19 September 2023.
  88. ↑ Jones, Megan (25 May 2023). "Injured worker flown to trauma center after fall at Fermilab construction site". Chicago Tribune. Aurora Beacon News. Retrieved 28 May 2023.
  89. ↑ "9:30 Current Program Overview", DOE O 420.2D Implementation Assist Visit, Environment, Safety and Health Dept., Fermilab, 2023-09-26, retrieved 2023-10-22
  90. ↑ "Department of Energy Issues Request for Information and Launches New Website for the Fermi National Accelerator Laboratory Management and Operating Contract Competition". Department of Energy Office of Science. Retrieved 23 March 2023.
  91. ↑ "M&O Contract Competitions". Office of Acquisition Management. Department of Energy Office of Science. 6 December 2022. Retrieved 25 March 2023.
  92. 1 2 3 "Informational Meeting". Office of Acquisitions Management. Department of Energy Office of Science. 7 March 2023. Retrieved 25 March 2023.
  93. ↑ "Petition to Reopen Fermilab". Reopen Fermilab. Physicists and visitors to Fermilab. Archived from the original on 2023-07-05. Retrieved 28 April 2023.
  94. ↑ Merminga, Lia. "From Director Lia Merminga: Accessing Fermilab's Batavia site". Fermilab News. Fermi National Accelerator Laboratory. Retrieved 16 May 2023.
  95. ↑ Feder, Toni (25 May 2023). "Scientists and the public petition to roll back Fermilab access restrictions". Physics Today. American Institute of Physics. 2023 (5): 0525a. doi:10.1063/PT.6.2.20230525a. Retrieved 28 May 2023.
  96. ↑ Gwynne, Peter (19 June 2023). "Fermilab faces protest over visitor restrictions". IOP Publishing. Physics World. Retrieved 22 June 2023.
  97. ↑ Marc, Tracy (March 28, 2022). "Fermilab site reopens to the public, welcomes visitors". Fermilab News.
  98. ↑ "Visit Fermilab". Fermilab. Retrieved 13 April 2022.
  99. ↑ "Fermilab History and Archives Project". Archived from the original on 2017-01-18.
  100. ↑ "The Fermilab Campus". About Fermilab. 1 December 2005. Archived from the original on 3 April 2007. Retrieved 27 February 2007.
  101. ↑ Shivni, Rashmi (January 27, 2016). "The genetic purity and diversity of the Fermilab bison herd". Fermilab News. Retrieved 2020-11-22.
  102. ↑ Sharos, David (April 22, 2019). "Baby bison born at Fermilab". The Beacon-News. Retrieved 2020-11-22 – via Chicago Tribune.
  103. ↑ "Safety and the Environment at Fermilab". Fermilab. 30 December 2005. Archived from the original on 2006-09-26. Retrieved 2006-01-06.
  104. ↑ "Ecology/Nature - Wildlife". Fermi National Accelerator Laboratory. 24 August 2001. Archived from the original on 2003-03-01. Retrieved 2011-10-26.
  105. ↑ "Nature and Ecology". Fermilab. Archived from the original on 2018-07-01. Retrieved 2018-09-09.
  106. ↑ "Fermilab Christmas Bird Count". Fermilab. Retrieved 22 February 2019.
  107. ↑ "Birds Find Haven at Fermilab". Fermilab | History and Archives | Site and Natural History. July 6, 1978. Retrieved 2021-04-27.
  108. ↑ "Tritium at Fermilab". Fermilab. Retrieved 13 April 2022.
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