Wall-loss distribution of charge breeding ions in an electron cyclotron resonance ion source

S C Jeong; M Oyaizu; N Imai; Y Hirayama; H Ishiyama; H Miyatake; K Niki; M Okada; Y X Watanabe; Y Otokawa; A Osa; S Ichikawa

doi:10.1063/1.3670740

Wall-loss distribution of charge breeding ions in an electron cyclotron resonance ion source

Rev Sci Instrum. 2012 Feb;83(2):02A910. doi: 10.1063/1.3670740.

Authors

S C Jeong¹, M Oyaizu, N Imai, Y Hirayama, H Ishiyama, H Miyatake, K Niki, M Okada, Y X Watanabe, Y Otokawa, A Osa, S Ichikawa

Affiliation

¹ Institute for Particle and Nuclear Physics (IPNS), High Energy Accelerator Research Organization (KEK), Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan. sunchan.jeong@kek.jp

PMID: 22380251
DOI: 10.1063/1.3670740

Abstract

We investigated the ion-loss distribution on the sidewall of an electron cyclotron resonance (ECR) plasma chamber using the 18-GHz ECR charge breeder at the Tokai Radioactive Ion Accelerator Complex (TRIAC). Similarities and differences between the ion-loss distributions (longitudinal and azimuthal) of different ion species (i.e., radioactive (111)In(1+) and (140)Xe(1+) ions that are typical volatile and nonvolatile elements) was qualitatively discussed to understand the element dependence of the charge breeding efficiency. Especially, the similarities represent universal ion loss characteristics in an ECR charge breeder, which are different from the loss patterns of electrons on the ECRIS wall.