Neutron Beam-Line Shield Design for the Protein Crystallography Instrument at the Lujan Center

摘要

We have developed a very seuful methodology for calculating absolute total (nuetron plus gamma-ray) dose equivalent rates for use in the design of neutron beam line shields at a spallation neutron source. We have applied this technique to the design of beam line shitelds for several new materials science instruments being built at the Manuel Lujan Jr. Neutron Scattering Center. These instruments have a variety of collimation systems and different beam line shielding issues. We show here some specific beam line shield designs for the Protein Crystallography Instrument.