Development of an intense negative hydrogen ion source with an external magnetic filter

• Y. Takeiri

  National Institute for Fusion Science, Nagoya 464-01, Japan

• A. Ando

  National Institute for Fusion Science, Nagoya 464-01, Japan

• O. Kaneko

  National Institute for Fusion Science, Nagoya 464-01, Japan

• Y. Oka

  National Institute for Fusion Science, Nagoya 464-01, Japan

• K. Tsumori

  National Institute for Fusion Science, Nagoya 464-01, Japan

• R. Akiyama

  National Institute for Fusion Science, Nagoya 464-01, Japan

• E. Asano

  National Institute for Fusion Science, Nagoya 464-01, Japan

• T. Kawamoto

  National Institute for Fusion Science, Nagoya 464-01, Japan

• T. Kuroda

  National Institute for Fusion Science, Nagoya 464-01, Japan

• M. Tanaka

  Hitachi Research Laboratory, Hitachi Ltd., Hitachi 316, Japan

• H. Kawakami

  Kokubu Works, Hitachi Ltd., Hitachi 316, Japan

抄録

An intense negative hydrogen ion source has been developed, which has a strong external magnetic filter field in the wide area of 35 cm×62 cm produced by a pair of permanent magnet rows located at 35.4 cm separation. The filter strength is 70 G in the center and the line-integrated filter strength is 850 G cm, which keeps the low electron temperature in the extraction region. Strong cusp magnetic field, 1.8 kG on the chamber surface, is generated for improvement of the plasma confinement. These resulted in the high arc efficiency at the low operational gas pressure. 16.2 A of H− ion current with the energy of 47 keV was obtained at the arc efficiency of 0.1 A/kW at the gas pressure of 3.8 mTorr in the cesium-mode operation. The magnetic field in the extraction gap is also strong, 450 G, for the electron suppression. The ratio of the extraction current to the negative ion current was less than 2.2 at the gas pressure of 3 mTorr. The two-stage acceleration was tested, and 13.6 A of H− ion beam was accelerated to 125 keV.

収録刊行物

• Review of Scientific Instruments

  Review of Scientific Instruments 66 (3), 2541-2546, 1995-03-01

  AIP Publishing

キーワード

• Instrumentation

詳細情報

• CRID: 1362262944501297408
• NII論文ID: 120000775286
• DOI: 10.1063/1.1145655
• ISSN: 10897623
• ISSN: 00346748
• Web Site: https://pubs.aip.org/aip/rsi/article-pdf/66/3/2541/19019458/2541_1_online.pdf
• データソース種別:
  • Crossref
  • CiNii Articles