Oak Ridge Today

Demarteau to head ORNL Physics Division

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Marcellinus Demarteau

By Dawn Levy

The U.S. Department of Energy’s Oak Ridge National Laboratory has named Marcel Demarteau as Physics Division Director, effective June 17.

“Marcel brings a keen sense of physics research to the Physics Division and will help in shaping its future in the areas of heavy-ion collisions, fundamental symmetries, neutrino physics, nuclear structure and astrophysics, and stable isotope production and research,” said David Dean, associate laboratory director for physical sciences.  

An expert in particle collider physics and a Fellow of the American Physical Society, Demarteau leads research in the structure and evolution of the universe. He chairs several advisory committees through which the particle physics community takes stock of past progress and charts future enterprises.

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Scientists seek new physics using ORNL’s intense neutrino source

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Neutrino Experiment at High Flux Isotope Reactor

The High Flux Isotope Reactor, a U.S. Department of Energy Office of Science User Facility that creates continuous neutron beams, is the site of a new neutrino experiment. Yale-led PROSPECT will probe neutrinos formed as a byproduct of radioactive decay processes. (Image credit: Oak Ridge National Laboratory, DOE/Photographer Genevieve Martin)

 

By Dawn Levy

Soon to be deployed at the U.S. Department of Energy’s Oak Ridge National Laboratory is an experiment to explore new physics associated with neutrinos. The Precision Oscillation and Spectrum Experiment, or PROSPECT, is led by Yale University and includes partners from 14 academic and governmental institutions. The DOE High Energy Physics program will support the experiment at the High Flux Isotope Reactor, or HFIR, a DOE Office of Science User Facility at ORNL. The neutrino, the subject of a 2015 Nobel Prize, remains a poorly understood fundamental particle of the Standard Model of particle physics.

These electrically neutral subatomic particles are made in stars and nuclear reactors as a byproduct of radioactive decay processes. They interact with other matter via the weak force, making their detection difficult. As a result of this elusiveness, neutrinos are the subject of many interesting and challenging detection experiments, including PROSPECT.

“Unique capabilities of ORNL will enable us to broaden the understanding of neutrino properties,” said David Dean, director of ORNL’s Physics Division. “The expansion of neutrino experiments at Oak Ridge National Laboratory is a win for the lab because we have a new scientific focus area, and a win for the scientific community because ORNL has unique neutrino sources that physicists will utilize to explore neutrino science.” [Read more…]

U.S. scientists celebrate the restart of the Large Hadron Collider, which involves ORNL

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Note: Oak Ridge National Laboratory has led an eight-year upgrade of the electromagnetic calorimeter used for LHC’s experiment called ALICE  (for A Large Ion Collider Experiment). This detector measures the energies of high-energy electrons and gamma rays to learn more about the conditions of the early universe. Thomas M. Cormier leads the LHC Heavy Ion Group in ORNL’s Physics Division.

On Sunday, April 5, the world’s most powerful particle accelerator began its second act. After two years of upgrades and repairs, proton beams once again circulated around the Large Hadron Collider, located at the CERN laboratory near Geneva, Switzerland.

With the collider back in action, the more than 1,700 U.S. scientists who work on LHC experiments are prepared to join thousands of their international colleagues to study the highest-energy particle collisions ever achieved in the laboratory.

These collisions—hundreds of millions of them every second—will lead scientists to new and unexplored realms of physics, and could yield extraordinary insights into the nature of the physical universe. [Read more…]

ORNL equipment weighing 1,500 pounds falls on worker’s legs

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A piece of surplus equipment that weighs more than 1,500 pounds tipped over and fell onto the legs of an Oak Ridge National Laboratory worker on March 31, fracturing both legs and breaking his thumb, a spokesman said.

When it tipped over, a few ORNL employees were loading the scattering chamber and cart onto the box truck of a person who had purchased the equipment at an auction, said David Keim, ORNL communications director.

A few metal arms that protrude from the scattering chamber might have hit the floor of the truck and created some space between the “deceptively heavy” piece of equipment and the worker’s legs, preventing even more serious injuries, Keim said. Also, the chamber and cart might have hit other equipment already loaded into the back of the truck, also helping to prevent more serious injuries. [Read more…]

ORNL researchers, UT-ORNL Governor’s Chair elected APS fellows

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ORNL APS Fellows

From left, Oak Ridge National Laboratory researchers Michael S. Smith and Viatcheslav V. Danilov and University of Tennessee-ORNL Governor’s Chair Steven Zinkle have been elected fellows of the American Physical Society. (Submitted photo)

Two researchers from Oak Ridge National Laboratory and a University of Tennessee-ORNL Governor’s Chair professor have been elected fellows of the American Physical Society.

The ORNL researchers are Viatcheslav V. Danilov of the Research Accelerator Division and Michael Scott Smith of the Physics Division. Steven J. Zinkle, formerly of ORNL and now a UT-ORNL Governor’s Chair, was recognized for his work during a 28-year career at the national laboratory.

Danilov was recognized by his APS peers “for fundamental and creative solutions to a wide range of accelerator physics issues, including laser stripping ring injection, integrable beam dynamics, space charge and instabilities.” [Read more…]

Nazarewicz, Sumpter, Wullschleger named UT-Battelle Corporate Fellows

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UT-Battelle Corporate Fellows

From left are Witold Nazarewicz, Bobby Sumpter, and Stan Wullschleger. (Photo courtesy Oak Ridge National Laboratory)

Witold Nazarewicz, Bobby Sumpter, and Stan Wullschleger of the U.S. Department of Energy’s Oak Ridge National Laboratory have been selected as 2013 UT-Battelle Corporate Fellows.

The rank of corporate fellow—among the lab’s highest honors—recognizes the researchers’ significant accomplishments and continuing leadership in their scientific, engineering, and technological fields. The addition of Nazarewicz, Sumpter and Wullschleger brings the number of active corporate fellows at ORNL to 33 researchers. [Read more…]

Research effort deep under ground could sort out cosmic-scale mysteries

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Majorana Demo

The Majorana Demonstrator is being assembled and stored 4,850 feet beneath the earth’s surface in enriched copper to limit the amount of background interference from cosmic rays and radioactive isotopes. (Submitted image)

The Oak Ridge National Laboratory has begun delivery of germanium-76 detectors to an underground laboratory in South Dakota in a team research effort that might explain the puzzling imbalance between matter and antimatter generated by the Big Bang.

“It might explain why we’re here at all,” said David Radford, who oversees specific ORNL activities in the Majorana Demonstrator research effort. “It could help explain why the matter that we are made of exists.”

Radford, a researcher in ORNL’s Physics Division and an expert in germanium detectors, has been delivering germanium-76 to Sanford Underground Research Laboratory in Lead, S.D., for the project. After navigating a Valentine’s Day blizzard on the first two-day drive from Oak Ridge, Radford made a second delivery in March. [Read more…]

Two ORNL researchers, two joint faculty receive DOE early career awards

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DOE Early Career Awards

Pictured from top left, clockwise, are Valentino Cooper, Gaute Hagen, Matthias Schindler, and Jason Hayward. They are 2013 awardees in the U.S. Department of Energy’s Early Career Research Program. (Submitted photo)

Materials science and physics research led by early career Oak Ridge National Laboratory scientists received a boost this week from the U.S. Department of Energy’s Office of Science Early Career Research Program.

The program, now in its fourth year, is designed to bolster the nation’s scientific workforce by providing support to exceptional researchers during crucial early career years when many scientists do their most formative work. This year’s 61 awardees were selected from a pool of 770 university- and national laboratory-based applicants.

“This highly competitive program is a well-deserved recognition for early-career scientists who are launching their own research programs,” ORNL Director Thom Mason said. “We are delighted that four of this year’s awards are going to researchers associated with ORNL.” [Read more…]

New leader named to UT-ORNL Supercomputer Center

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Tony Mezzacappa

Tony Mezzacappa

Tony Mezzacappa, a leader in the field of astrophysics and supernova science, has been named director of the Joint Institute for Computational Sciences at the University of Tennessee and Oak Ridge National Laboratory.

Mezzacappa is a world leader in computational astrophysics and a pioneer in the field of supernova science. He is a UT-Battelle Corporate Fellow and group leader for theoretical physics in the Physics Division at ORNL.

He is also a joint professor in the UT Department of Physics and Astronomy. With this new position, Mezzacappa will become the department’s Newton W. and Wilma C. Thomas Endowed Chair in Theoretical and Computational Astrophysics.

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