Neutron focusing system for the Texas Cold Neutron Source

Bernard W. Wehring, Jong Youl Kim, Kenan Ünlü

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A "converging neutron guide" focusing system located at the end of the Texas Cold Neutron Source (TCNS) "curved neutron guide" would increase the neutron flux for neutron capture experiments. Our design for a converging guide is based on using several rectangular truncated cone sections. Each rectangular truncated cone consists of four 20-cm long Si plates coated with NiC-Ti supermirrors. Dimensions of each section were determined by a three-dimensional Monte Carlo optimization calculation. The two slant angles of the truncated cones were varied to optimize the neutron flux at the focal area of the focusing system. Different multielement converging guides were designed and their performance analyzed. From the performance results and financial considerations, we selected a four-section 80-cm long converging guide focusing system for construction and use with the TCNS. The focused cold neutron beam will be used for neutron capture experiment, e.g., prompt gamma activation analysis and neutron depth profiling.

Original languageEnglish (US)
Pages (from-to)137-140
Number of pages4
JournalNuclear Inst. and Methods in Physics Research, A
Issue number1-3
StatePublished - Dec 30 1994

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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