A compact post-acceleration beam chopper for a 4.5 MV Dynamitron pulsed neutron generator

S. Matsuyama, M. Fujisawa, M. Baba, T. Iwasaki, S. Iwasaki, R. Sakamoto, N. Hirakawa, K. Sugiyama

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A post-acceleration beam chopper (PACS) has been installed for a 4.5 MV Dynamitron accelerator to improve the energy resolution of neutron time-of-flight (TOF) experiments by shortening the duration of the ion beam pulses. The PACS sweeps the accelerated ion pulses across a chopping slit and eliminates the tails of the beam pulses. It operates sinusoidally at a frequency of 8 MHz with a maximum voltage of 10 kV peak to peak in synchronization with the accelerated ion pulses. The high voltage generator of the PACS was constructed of commercially available amplifiers and components, which realized easy maintenance and low cost. The PACS proved to be very effective to improve the pulse shape and has been applied for double-differential neutron emission cross section measurements.

Original languageEnglish
Pages (from-to)34-40
Number of pages7
JournalNuclear Inst. and Methods in Physics Research, A
Volume348
Issue number1
DOIs
Publication statusPublished - 1994 Aug 21

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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