Neutron production at ORNL's SNS reaches design power level

November 27, 2018 by Jeremy Rumsey, Oak Ridge National Laboratory
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. Credit: Oak Ridge National Laboratory

The Spallation Neutron Source at the Department of Energy's 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. The achievement marks a new operational milestone for neutron scattering in the US and opens the door to studying significantly smaller materials with greater complexity.

"The operation of SNS at 1.4 megawatts this cycle has been an outstanding ," 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 , 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. Incorporating target vessel modifications such as gas injection of helium bubbles into the target's mercury flow significantly reduced stresses induced by the beam's immense high-energy pulses. In addition, the SNS operations team executed a Target Management Plan developed in 2016 that paves the way for higher powers by operating three targets a year for sustainable reliability.

Constructed in 2006, SNS is a one-of-a-kind pulsed accelerator-based scattering facility that provides powerful state-of-the-art capabilities to thousands of researchers around the world to study energy and materials at the atomic scale.

The facility produces neutrons by launching protons down a linear accelerator and into a liquid mercury target. Upon impact, a "spall" of neutrons is created which are then sent to surrounding high powered instruments. Neutrons scatter off atoms within a sample, revealing fundamental information about how the atoms within the system are behaving and how much distance is between them.

Science discoveries only made possible by neutrons at SNS include unprecedented insights into the exotic behavior of the magnetic Majorana fermion—a promising building block for topological quantum computing; mitigation of air pollution by characterizing a metal organic framework material's ability to remove harmful nitrogen dioxide from the atmosphere; and first-of-a-kind experiments performing real-time in situ measurements on a running gas-powered engine.

Explore further: SNS completes full neutron production cycle at record power level

Related Stories

U.S. neutron source facility sets records

February 13, 2007

U.S. scientists are excited with the accomplishments achieved during the first nine months of operations at the Spallation Neutron Source facility.

Recommended for you

How heavy elements come about in the universe

March 19, 2019

Heavy elements are produced during stellar explosion or on the surfaces of neutron stars through the capture of hydrogen nuclei (protons). This occurs at extremely high temperatures, but at relatively low energies. An international ...

Trembling aspen leaves could save future Mars rovers

March 18, 2019

Researchers at the University of Warwick have been inspired by the unique movement of trembling aspen leaves, to devise an energy harvesting mechanism that could power weather sensors in hostile environments and could even ...

Quantum sensing method measures minuscule magnetic fields

March 15, 2019

A new way of measuring atomic-scale magnetic fields with great precision, not only up and down but sideways as well, has been developed by researchers at MIT. The new tool could be useful in applications as diverse as mapping ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.