Influence of the Cathode Material Properties in Reducing the Back-Bombardment Effect in Thermionic RF Gun

DOI 機関リポジトリ (HANDLE) HANDLE オープンアクセス

この論文をさがす

説明

The effect of back-bombardment (BB) electrons is considered one of the main obstacles for extensive use of thermionic RF guns (T-RF). The 10 hexaboride materials named (Ca, Sr, Ba, La, Ce, Pr, Nd, Sm, Eu, and Gd) B6 are investigated in this paper to survey the effect of the cathode material on reducing BB electrons and compare them with LaB₆ (which is widely used as a thermionic cathode). A numerical model was used to conduct this paper. Besides the numerical calculations, an experiment has been performed to determine the work functions of CeB₆ and LaB₆. The results from the numerical calculations revealed that (Ba, Ca, and Nd) B₆ are less affected by BB electrons: 42%, 50%, and 59%, respectively, compared with LaB₆, for low beam current applications. In contrast, for high beam current duties, (Nd, Ce, and Sm) B₆ have minimum influence by BB electrons compared with other hexaborides. The study concluded that BB electrons are strongly affected by the properties of the cathode material, especially thermionic emission and material density. Moreover, the study suggests that it is worthwhile to prepare BaB₆, CaB₆, NdB₆, and SmB₆ as cathode materials, then to subject them to a real experimental test using T-RF gun to compare their performance and BB effect against LaB₆.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1050001338421050624
  • NII論文ID
    120006712290
  • ISSN
    00189383
    15579646
  • DOI
    10.1109/ted.2018.2867932
  • HANDLE
    2433/243257
  • 本文言語コード
    en
  • 資料種別
    journal article
  • データソース種別
    • IRDB
    • CiNii Articles
    • OpenAIRE

問題の指摘

ページトップへ