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ORNL names associate lab director for neutron sciences

Posted at 7:47 pm April 2, 2024
By Oak Ridge Today Staff Leave a Comment

Jens Dilling (Photo courtesy Oak Ridge National Laboratory)

Jens Dilling has been named associate laboratory director for the Neutron Sciences Directorate at Oak Ridge National Laboratory, effective April 1.

“ORNL pioneered neutron scattering in the 1940s, developing a new technique that enables scientists to explore and create new materials, batteries, and more,” ORNL Director Stephen Streiffer said. “Today, ORNL remains at the forefront of this science, and Jens will play a critical role in ensuring the nation’s leading neutron sources continue to deliver significant scientific impact for the United States and the world.”

Dilling has served as interim associate laboratory director for neutron sciences since August 1. He leads more than 700 employees at the High Flux Isotope Reactor and Spallation Neutron Source—two of the most powerful scientific research facilities in the world—as well as in projects focused on improving the lab’s neutron capabilities.

“Dilling demonstrated strong leadership in his interim role and will continue the (Neutron Sciences Directorate) team’s efforts to expand the scientific impact of the lab’s neutron sources while also growing the neutron user community across the United States,” ORNL said.

Neutron scattering uses beams of neutrons (parts of atoms that have no charge) that pass through samples. Detectors collect information about where (and possibly when) the neutrons are scattered to learn more about the materials. The Spallation Neutron Source uses a particle accelerator to send protons (positively charged parts of atoms) to collide with a heavy metal target to produce the neutrons in a process known as spallation. Meanwhile, at the High Flux Isotope Reactor, neutrons are produced by a nuclear reactor.

ORNL said neutron scattering is used in industries that include automotive, aerospace, steel, defense, industrial materials, energy storage, data storage, and biomedicine. Researchers use the process to find stronger glass for mobile devices, drugs that treat diseases more effectively, aircraft and rocket engines that are more reliable, vehicles with better gas mileage, better armor for the military, and batteries that are safer, charge faster, and last longer.

Dilling is an experimental nuclear physicist with “more than 20 years delivering breakthroughs in fundamental and applied nuclear physics,” the lab said. He started at ORNL in 2021, serving as director of Institutional Strategic Planning. In 2023, he took a joint faculty appointment as a research professor in the Department of Physics at Duke University, a core university of UT-Battelle LLC, the partnership that operates ORNL for the U.S. Department of Energy.

Before ORNL, Dilling worked for two decades at TRIUMF, Canada’s national laboratory for accelerator sciences at the University of British Columbia. He started at TRIUMF in 2001 as a research scientist before moving into various leadership positions, concluding his tenure as the associate laboratory director for physical sciences, a press release said.

Dilling earned his undergraduate and doctoral degrees in physics from the University of Heidelberg in Germany. He is a fellow of the American Physical Society, or APS, and received the APS Francis M. Pipkin Award, the Vogt Medal from the Canadian Association of Physicists, or CAP, and the Rutherford Memorial Medal from the Royal Society of Canada for “breakthrough discoveries in the field of experimental nuclear physics studying the fine details of the interactions of the atomic building blocks, the nucleons.” He is a professional member of APS, the German Physical Society, CAP, the Canadian Society for Mass Spectrometry, and the American Association for the Advancement of Science.

More information will be added as it becomes available.

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Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: High Flux Isotope Reactor, Jens Dilling, neutron scattering, Neutron Sciences Directorate, Oak Ridge National Laboratory, ORNL, Spallation Neutron Source, Stephen Streiffer

SNS on hiatus for upgrade

Posted at 6:48 pm September 25, 2023
By Oak Ridge Today Staff Leave a Comment

Construction is under way for the Proton Power Upgrade at Oak Ridge National Laboratory’s Spallation Neutron Source. (Photo credit: Brett Riffert/ORNL, U.S. Department of Energy)

The Spallation Neutron Source at Oak Ridge National Laboratory—already the world’s most powerful accelerator-based neutron source—will be on a planned hiatus through June 2024 as crews work to upgrade the facility.

Much of the work—part of the facility’s Proton Power Upgrade project—will involve building a connector between the accelerator and the planned Second Target Station at SNS, a press release said. When complete, the PPU project will bring the accelerator up to 2.8 megawatts from its current record-breaking 1.7 megawatts of beam power.

Workers will add about 3,000 square feet of concrete tunnel, the “stub,” which will integrate with an existing tunnel. Construction tasks include associated structures, roofing, geomembrane liner, tunnel waterproofing, electrical, fire alarm, ventilation systems, and controls.

“The construction crews have performed all of the excavation work and are transitioning to tunnel base and wall construction,” said ORNL’s Mark Champion, PPU project manager.

[Read more…]

Filed Under: Oak Ridge National Laboratory, ORNL, Slider, U.S. Department of Energy Tagged With: first target station, John Galambos, Mark Champion, neutron source, neutrons, Oak Ridge National Laboratory, ORNL, PPU, proton power upgrade, Second Target Station, SNS, Spallation Neutron Source, stub

ORNL to receive $497 million in Inflation Reduction Act funding 

Posted at 3:50 pm November 12, 2022
By John Huotari Leave a Comment

Oak Ridge National Laboratory will receive $497 million from the Inflation Reduction Act for projects that include nuclear fusion and neutron research, supercomputing, materials science, and radioisotope production. More than half of the money, 52% of it, will be used for U.S. contributions to an international nuclear fusion project.

ORNL’s $497 million is about one-third of the $1.55 billion provided to the U.S. Department of Energy’s Office of Science by the Democrat-led Congress under the IRA. President Joe Biden signed the IRA, which included a range of provisions and passed along party lines, into law in August. It provides money for more than 52 DOE projects already in the works.

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Filed Under: Front Page News, Oak Ridge National Laboratory, Premium Content, Top Stories, U.S. Department of Energy Tagged With: Chuck Fleischmann, DOE, Inflation Reduction Act, ITER, Jennifer Granholm, Large Enriched Germanium Experiment for Neutrinoless Double-Beta Decay, LEGEND, Marsha Blackburn, Materials Plasma eXposure Experiment, materials science, MPEX, neutron research, nuclear fusion, Oak Ridge Leadership Computing Facility, Oak Ridge National Laboratory, Office of Science, ORNL, Radioisotope Processing Facility, radioisotope production, Second Target Station, Spallation Neutron Source, Stable Isotope Production and Research Center, supercomputing, Thomas Zacharia, U.S. Department of Energy, U.S. ITER

Work starts to increase power of SNS proton beam

Posted at 3:18 pm April 28, 2020
By John Huotari Leave a Comment

Construction work has started on a part of a project to double the power of the proton beam in the Spallation Neutron Source at Oak Ridge National Laboratory. It’s the first construction work at SNS since 2006. (Photo courtesy ORNL)

Construction work has started on a part of a project to double the power of the proton beam in the Spallation Neutron Source at Oak Ridge National Laboratory.

It’s the first construction work at the $1.4 billion SNS since 2006.

The current work is limited to what is known as the klystron gallery. It houses radio-frequency systems. They power the structures that are used to accelerate a negatively-charged hydrogen ion beam in the linear accelerator at SNS.

ORNL has previously said the klystron gallery construction could last about one year.

The work is part of a project called the proton power upgrade, or PPU. It will eventually double the power of the SNS proton beam from 1.4 megawatts to 2.8 megawatts. That could be a seven-year project. The potential cost has previously been estimated at $245 million.

[Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, ORNL, Slider, U.S. Department of Energy Tagged With: construction, first target station, klystron gallery, linear accelerator, mercury target, neutrons, Oak Ridge National Laboratory, ORNL, proton beam, proton power upgrade, protons, Second Target Station, SNS, Spallation Neutron Source, tungsten target

Next major decision anticipated for second target station at SNS

Posted at 3:27 pm March 2, 2020
By John Huotari Leave a Comment

SNS-Second-Target-Station
More than 200 scientists from around the world met from Oct. 27 to 29, 2015, at the U.S. Department of Energy’s Oak Ridge National Laboratory to provide input on the scientific instruments that would be installed at a proposed Second Target Station, or STS, pictured above at center right at the Spallation Neutron Source. (File aerial photo and overlay by ORNL)

The next decision about the second target station at the Spallation Neutron Source could be made later this year or in the first quarter of next year, U.S. Energy Secretary Dan Brouillette told a House subcommittee on Thursday. The next decision would include an alternative selection and a cost range.

The $1.4 billion SNS is located on Chestnut Ridge at Oak Ridge National Laboratory. It provides neutrons for research.

The second target station has been part of SNS plans for many years. It’s one of two upgrades being pursued at SNS. The other is a proton power upgrade, which is expected to double the power of SNS’s proton beam from 1.4 megawatts to 2.8 megawatts.

The second target station has a current estimated cost range of $800 million to $1.5 billion. The U.S. Department of Energy said the second target was needed more than a decade ago, in January 2009. The second target station would use a narrow proton beam and a compact, rotating, water-cooled tungsten target. It is expected to fill gaps in materials research that require the combined use of intense, cold (longer wavelength) neutrons and instruments that can help analyze complex materials. It could have up to 22 experimental beamlines.

[Read more…]

Filed Under: Federal, Front Page News, Government, Oak Ridge National Laboratory, Science, Top Stories, U.S. Department of Energy Tagged With: Chuck Fleischmann, Dan Brouillette, DOE, House Energy and Water Development Subcommittee, neutron science, neutrons, proton beam, proton power upgrade, protons, Second Target Station, SNS, SNS target, Spallation Neutron Source, U.S. Department of Energy

SNS adding 20th instrument

Posted at 10:55 pm July 23, 2019
By John Huotari Leave a Comment

An artistic rendering of the VENUS imaging beam line under construction at Oak Ridge National Laboratory’s Spallation Neutron Source. ORNL said VENUS will provide insights into research areas that include nuclear fuels such as uranium, left, additively manufactured materials, biological processes, engineered components, and studies of archeological and natural materials. (Image credit: ORNL/Jill Hemman)

A 20th research instrument is under construction at the Spallation Neutron Source at Oak Ridge National Laboratory.

The new neutron imaging instrument is known as VENUS, or Versatile Neutron Imaging Instrument. It is expected to be completed in 2022 and expected to be ready for scientific use by 2023.

“The beam line will ensure the United States remains competitive with international spallation sources that are already building or currently operate advanced imaging instruments,” ORNL said in an article by Jeremy Rumsey published Tuesday.

The new instrument will allow researchers to study “in real time” the makeup and performance of a wide range of functional materials under varying environments, ORNL said.

“Coupled with SNS, the world’s most powerful pulsed accelerator-based neutron source, VENUS will be the only open research facility platform in the U.S. to provide time-of-flight neutron imaging capabilities to users from academia and industry,” the lab said.

[Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, U.S. Department of Energy Tagged With: Hassina Bilheux, Jeremy Rumsey, neutron imaging, neutron source, neutrons, Oak Ridge National Laboratory, SNS, Spallation Neutron Source, U.S. Department of Energy, VENUS, Versatile Neutron Imaging Instrument

For members: Construction planned for SNS power upgrade

Posted at 12:21 pm July 19, 2019
By John Huotari Leave a Comment

The Spallation Neutron Source at Oak Ridge National Laboratory reached its operational power design level by running a neutron production cycle at 1.4 megawatts, the lab said Tuesday, Nov. 27, 2018. (Photo courtesy ORNL)

Construction is planned in December for a project to upgrade proton power at the Spallation Neutron Source at Oak Ridge National Laboratory.

The construction could last about one year, and it will be limited to the buildout of what is known as the klystron gallery, ORNL said in June. The klystron gallery houses the radio-frequency systems that power the structures used to accelerate a negatively-charged hydrogen ion beam in the linear accelerator at SNS.


The Spallation Neutron Source at Oak Ridge National Laboratory reached its operational power design level by running a neutron production cycle at 1.4 megawatts, the lab said Tuesday, Nov. 27, 2018. (Photo courtesy ORNL)

 

Construction is planned in December for a project to upgrade proton power at the Spallation Neutron Source at Oak Ridge National Laboratory.

The construction could last about one year, and it will be limited to the buildout of what is known as the klystron gallery, ORNL said in June. The klystron gallery houses the radio-frequency systems that power the structures used to accelerate a negatively-charged hydrogen ion beam in the linear accelerator at SNS.

SNS generates neutrons for scientific research by propelling protons down a linear accelerator. When the protons collide with a liquid mercury target, they create a “spall” of neutrons that are sent down beam lines surrounded by research instruments.

The proton power upgrade will eventually double the power of the SNS proton beam from 1.4 megawatts to 2.8 megawatts. The current total estimated project cost is $245 million.

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If you prefer to send a check, you may do so by mailing one to: Oak Ridge Today P.O. Box 6064 Oak Ridge, TN 37831 Note: Most news stories on Oak Ridge Today are free, brought to you by Oak Ridge Today with help from our advertisers, sponsors, and subscribers. Some are considered premium content. This story is premium content. Premium content can include in-depth, investigative, and exclusive stories.

Filed Under: Front Page News, Oak Ridge National Laboratory, ORNL, Premium Content, Slider, U.S. Department of Energy Tagged With: accelerator beam, construction, DOE, expression of interest, hydrogen ion, klystron gallery, liquid mercury target, Morgan McCorkle, neutron scattering, neutrons, Oak Ridge National Laboratory, ORNL, proton beam, proton power upgrade, protons, Second Target Station, SNS, Spallation Neutron Source, tungsten target, U.S. Department of Energy, UT-Battelle

Four workers received small external doses, SNS outage started early after ‘pressure transient’

Posted at 11:52 pm July 18, 2019
By John Huotari Leave a Comment

An aerial view of the Spallation Neutron Source at Oak Ridge National Laboratory. (Photo by ORNL)

Note: This story was updated at 12 p.m. July 19.

Four workers received small external radiation doses and a planned outage of the Spallation Neutron Source was started a few days early after an unexpected “pressure transient” in March, according to Oak Ridge National Laboratory.

The low radiation dose levels (less than 25 millirem) were well below the regulatory threshold of 5,000 mrem annual exposure, which was established to protect worker safety, ORNL said in June.

The pressure transient occurred in the SNS mercury loop. When radiation was detected, ORNL staff closed off the affected area and reviewed workers’ dosimeters.

“Readings showed four workers received small external doses, none more than 25 millirem,” ORNL said.

For comparison, a chest x-ray produces a radiation dose of about 6 mrem; a mammogram about 13 mrem, and a head and chest CT scan is 1,100 mrem[1].

[Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: dosimetry, mercury loop, Oak Ridge National Laboratory, ORNL, planned outage, pressure transient, radiation, radiation dose, SNS, Spallation Neutron Source, target service bay, U.S. Department of Energy

Neutron production at ORNL’s SNS reaches design power level

Posted at 2:05 pm December 3, 2018
By Oak Ridge Today Staff Leave a Comment

The Spallation Neutron Source at Oak Ridge National Laboratory has reached its operational power design level by running a neutron production cycle at 1.4 megawatts, the lab said Tuesday, Nov. 27, 2018. (Photo courtesy ORNL)

The Spallation Neutron Source at Oak Ridge National Laboratory has reached its operational power design level by running a neutron production cycle at 1.4 megawatts, the lab said Tuesday, Nov. 27, 2018. (Photo courtesy ORNL)

 

The Spallation Neutron Source at Oak Ridge National Laboratory has broken a new record by ending its first neutron production cycle in fiscal year 2019 at its design power level of 1.4 megawatts.

Higher power provides more neutrons for researchers who use the facility to study a wide range of materials, an ORNL press release said. The achievement marks a new operational milestone for neutron scattering in the United States and opens the door to studying significantly smaller materials with greater complexity, the press release said.

“The operation of SNS at 1.4 megawatts this cycle has been an outstanding achievement,” said Paul Langan, associate laboratory director for neutron sciences. “It reflects on the maturity of our facility and the high level of technical excellence of our engineering, operational, and scientific staff.”

The power increase was enabled by the combination of extensive improvements to the linear accelerator, including the recent replacement of the radio frequency quadrupole—the first accelerating structure of the accelerator’s frontend assembly, as well as improvements to the liquid mercury target. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: DOE Office of Science, linear accelerator, liquid mercury target, neutron scattering, neutron science, Oak Ridge National Laboratory, ORNL, Paul Langan, power level, pulsed accelerator-based neutron scattering, SNS, Spallation Neutron Source, Thomas Zacharia, U.S. Department of Energy

SNS completes full neutron production cycle at record power level

Posted at 3:31 pm August 9, 2018
By Oak Ridge Today Staff Leave a Comment

As protons (pink) strike the target vessel and pass into the liquid mercury inside, the protons are absorbed, creating neutrons (blue) that are then sent through moderators and beam tubes to research instruments to study the fundamental properties of materials. (Image credit: Jill Hemman/Oak Ridge National Laboratory, U.S. Department of Energy)

As protons (pink) strike the target vessel and pass into the liquid mercury inside, the protons are absorbed, creating neutrons (blue) that are then sent through moderators and beam tubes to research instruments to study the fundamental properties of materials. (Image credit: Jill Hemman/Oak Ridge National Laboratory, U.S. Department of Energy)

 

The Spallation Neutron Source at the U.S. Department of Energy’s Oak Ridge National Laboratory has reached a new milestone by operating a complete neutron production run cycle at 1.3 megawatts, a press release said.

“Achieving the record power level with a remarkable 94 percent accelerator beam availability establishes a new baseline of operation as well as a path to operate reliably at higher powers,” the press release said. “Increased power offers researchers the ability to conduct faster scientific analyses using neutrons on more types of materials.”

SNS, a DOE Office of Science User Facility, began operations in 2006 and is currently the world’s most powerful pulsed accelerator-based neutron scattering facility, used by scientists to reveal fundamental properties and behaviors of energy and materials at the atomic scale. Neutron contributions at SNS have resulted in advances in electronic devices, improved drug delivery, and stronger building materials for transportation infrastructure, the press release said. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, ORNL, Slider, Top Stories, U.S. Department of Energy Tagged With: DOE, liquid mercury target, neutron production, neutron production cycle, neutrons, Oak Ridge National Laboratory, Office of Science, ORNL, pulsed accelerator-based neutron scattering, record power level, SNS, Spallation Neutron Source, U.S. Department of Energy, UT-Battelle

Public can tour parts of ORNL, celebrate 75 years on Lab Day (June 9)

Posted at 4:46 pm April 27, 2018
By Oak Ridge Today Staff Leave a Comment

The public will have a chance to tour parts of Oak Ridge National Laboratory and help celebrate the lab's 75th anniversary on Saturday, June 9, 2018. (Photo by ORNL)

The public will have a chance to tour parts of Oak Ridge National Laboratory and help celebrate the lab’s 75th anniversary on Saturday, June 9, 2018. (Photo by ORNL)

 

The public will have a chance to tour parts of Oak Ridge National Laboratory and help celebrate the lab’s 75th anniversary on Saturday, June 9.

The event will include family-friendly activities, tours, demonstrations, and talks, a press release said.

The “75 Years of Science: Lab Day at ORNL” special event will give the public an opportunity to visit world-leading scientific facilities such as the Spallation Neutron Source and the Titan supercomputer, see one of the world’s first nuclear reactors, and interact with research staff, the press release said.

“The pioneering research of ORNL scientists and engineers has played a pivotal role in our nation’s history and continues to shape our future,” ORNL Director Thomas Zacharia said. “We look forward to welcoming the community to celebrate with us as we pursue another 75 years of leadership in science.”

Registration is required to attend the June 9 event. Advance registration for U.S citizens and non-U.S. citizens, ages 6 and up, will open Tuesday, May 1, and close Friday, May 11, at https://75thanniversary.ornl.gov/register/. Space is limited, and registration will close earlier than May 11 if all space is allotted. A limited number of day-of registration spots will be available for U.S. citizens only. [Read more…]

Filed Under: Community, Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: 75th anniversary, Graphite Reactor, High Flux Isotope Reactor, Oak Ridge, Oak Ridge Leadership Computing Facility, Oak Ridge National Laboratory, ORNL, Spallation Neutron Source, Titan, tours

ORNL: Neutrons peer into a running engine

Posted at 3:25 pm September 3, 2017
By Oak Ridge Today Staff Leave a Comment

Researchers used neutrons to probe a running engine at Oak Ridge National Laboratory’s Spallation Neutron Source, giving them the opportunity to test an aluminum-cerium alloy under operating conditions. From left, researchers Orlando Rios, Ke An, and Eric Stromme show off a cylinder head made from the new alloy. (Photo by ORNL/U.S. Department of Energy)

Researchers used neutrons to probe a running engine at Oak Ridge National Laboratory’s Spallation Neutron Source, giving them the opportunity to test an aluminum-cerium alloy under operating conditions. From left, researchers Orlando Rios, Ke An, and Lt. Eric Stromme show off a cylinder head made from the new alloy. (Photo by ORNL/U.S. Department of Energy)

 

By Ashley C. Huff, Oak Ridge National Laboratory

In a first-of-a-kind experiment, researchers used neutrons to investigate the performance of a new aluminum alloy in a gasoline-powered engine—while the engine was running.

A team from the U.S. Department of Energy’s Oak Ridge National Laboratory worked with industry partners to perform the test, which looked at whether a high-performance alloy that is promising for automotive applications held up under the heat and stress of an internal combustion engine.

Researchers used neutrons to probe a running engine at ORNL’s Spallation Neutron Source, giving them the opportunity to test an aluminum-cerium alloy under operating conditions.

The feat was a first for the Spallation Neutron Source, said Ke An, lead instrument scientist for the facility’s VULCAN instrument.

“This was the first time an internal combustion engine has been run on our diffractometer, and, as far as we know, on any other,” he said. [Read more…]

Filed Under: Front Page News, Oak Ridge National Laboratory, Top Stories, U.S. Department of Energy Tagged With: Advanced Manufacturing Office, Al-Ce cylinder head, aluminum alloy, aluminum-cerium alloy, Ames National Laboratory, Critical Materials Institute, DOE, DOE Office of Science, Eck Industries, Eric Stromme, Idaho National Laboratory, Ke An, Lawrence Livermore National Laboratory, Manufacturing Demonstration Facility, Michael Kesler, National Transportation Research Center, neutrons, Oak Ridge National Laboratory, Office of Energy Efficiency and Renewable Energy, Office of Science, Orlando Rios, ORNL, Spallation Neutron Source, U.S. Department of Energy, University of Tennessee Bredesen Center, Vehicle Technologies Office, VULCAN instrument, Zachary Sims

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