A simple method for measuring transition efficiencies of weak-field radio frequency transition units for polarized atomic hydrogen sources

Hidehiko Arima, Mitsuhiro Takada, Yoshito Shimosaki, Keisuke Maehata, Kenji Ishibashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A weak magnetic field radio frequency transition unit (RFT) was developed and installed in a compact atomic-beam type polarized ion source. A simple experimental method was devised to determine the transition efficiency of the RFT without ionizing and/or accelerating of the atomic beam. This method is based on the switching operation of the RFT generating the difference in the atomic beam intensity. The measurement of the atomic beam intensity and the calculation of the acceptance for each state of the atom in the atomic beam system allow us to determine the transition efficiency of the RFT. The experimental transition efficiency of the RFT for hydrogen atoms was 0.88. For studying the validity of this method, the transition efficiency was calculated by solving a time-dependent Schrodinger equation by considering the actual magnetic field distribution in the RFT. The calculation results reproduced the experimental data within about 10% error.

Original languageEnglish
Pages (from-to)646-652
Number of pages7
Journaljournal of nuclear science and technology
Volume36
Issue number8
DOIs
Publication statusPublished - Aug 1999

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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