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For members: Construction planned for SNS power upgrade

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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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Neutron production at ORNL’s SNS reaches design power level

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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…]

SNS completes full neutron production cycle at record power level

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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…]

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