Neutron focusing using capillary optics

Materials research with neutrons at NIST

“…Experiments are underway to use a chopped neutron beam for PGAA to discriminate against or in favor of capture products with lifetimes in the millisecond range [ 130 ]. Narrow, intense focused neutron beams from capillary optical lenses [ 131 ] are being used for spatially resolved PGAA [ 132 ] and NDP [ 133 ]. Plans are being made to relax the confined geometry for the cold PGAA beam, which will dramatically improve the hydrogen and fast-neutron backgrounds and permit the analysis of large samples.…”

Suitability of polycapillary optics for focusing of monochromatic synchrotron radiation as used in trace level micro-XANES measurements

“…Polycapillary lenses have gained a lot of attention during the last decade for both X-ray and neutron focusing applications. 1,2 With respect to conditioning of hard X-rays, these devices offer an efficient and flexible way of beam formation, either by beam focusing or by production of quasi-parallel beams, through the wave-guiding properties of the glass fiber channels constituting the polycapillary.…”

IPNS upgrade: A feasibility study

“…In the Workshop on Ion Source Issues Relevant to a Pulsed Spallation Neutron Source held on October [24][25][26]1994, at Lawrence Berkeley Laboratory, it was concluded that that extensive ion source R&D is required for all other pulsed source concepts. The IPNS Upgrade plan is to construct a test stand for reliability and serviceability testing of an ion source.…”