Possible Atmospheric-like Neutron Beams at CSNS

TL;DR

CSNS will develop atmospheric-like white neutron beams with broad spectra, offering the most intensive neutron sources in China for chip irradiation and neutron single event effect testing, filling a crucial gap in neutron research infrastructure.

Contribution

First white neutron beam lines in China with high intensity, simulated and compared with existing sources for chip irradiation experiments.

Findings

Neutron spectra are very wide, suitable for chip irradiation.

CSNS neutron beams are the most intensive in recent years.

Estimated fidelity of neutron spectra for experiments.

Abstract

China Spallation Neutron Source (CSNS) will start commissioning in early 2018. The neutron spectra from the tungsten target bombarding by 1.6 GeV proton beam are very wide, namely white neutron spectra. Two white neutron beams schemed by CSNS are simulated by FLUKA. And the beam spectrum and intensity comparisons with other neutron sources in service are made. The fidelity of neutron spectra of these two white-neutron beam lines for chip irradiation experiments are estimated. The CSNS atmospheric-like neutron beams will be the first white neutron beam lines in China and the most intensive ones in a few years suitable to carry out the accelerated test experiments of neutron single event effect in the world.