A compact electron cyclotron resonance negative hydrogen ion source for evaluation of plasma electrode materials

Takayuki Eguchi; Mamiko Sasao; Yuji Shimabukuro; Fumiya Ikemoto; Masashi Kisaki; Haruhisa Nakano; Katsuyoshi Tsumori; Motoi Wada

doi:10.1063/1.5128610

A compact electron cyclotron resonance negative hydrogen ion source for evaluation of plasma electrode materials

Rev Sci Instrum. 2020 Jan 1;91(1):013508. doi: 10.1063/1.5128610.

Authors

Takayuki Eguchi¹, Mamiko Sasao², Yuji Shimabukuro¹, Fumiya Ikemoto¹, Masashi Kisaki³, Haruhisa Nakano³, Katsuyoshi Tsumori³, Motoi Wada¹

Affiliations

¹ Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
² Office of R&D Promotion, Doshisha University, Kamigyoku, Kyoto 602-8580, Japan.
³ National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292, Japan.

PMID: 32012543
DOI: 10.1063/1.5128610

Abstract

A compact ion source that produces hydrogen plasma with an electron cyclotron resonance (ECR) configuration combined with a 2-stage extraction system with a single aperture of 6 mm diameter has been designed and built to study the performance of different materials as the plasma electrode (PE) of a negative hydrogen ion source. The source has the capability to electrically bias the PE with respect to the ECR plasma. The first experiment with low ECR power input (less than 40 W) was carried out. The PE of the C12A7 electride showed the largest H^- current among aluminum, molybdenum, and the C12A7 electride.