Impurities Reduction Conditionings to Recover Best Beam Quality of J-PARC Cesiated RF-Driven H- Ion Source with New Parts Exposed to Plasma

• Published in: Journal of physics. Conference series Vol. 2244; no. 1; pp. 12029 - 12033
• Main Authors: Ueno, Akira, Ohkoshi, Kiyonori, Ikegami, Kiyoshi, Oguri, Hidetomo
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2022
• Subjects: Impurities; Ion sources; Physics; Plasma; Proton accelerators; Temperature control

Abstract For the J-PARC operations, only three plasma chambers (PCHs) of #7, #8 and #9PCHs among ten PCHs have been used since the transverse emittances of the beam produced with them are more superior than those with others for unknown reasons. However, the #7PCH beam emittances were enlarged by 16...