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Title: Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H{sup −} ion source

Abstract

The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H{sup −} ion source has been successfully operated for about 1 yr. By the world brightest level beam, the J-PARC design beam power of 1 MW was successfully demonstrated. Although no internal-RF-antenna failure, except for the once caused by an excess cesium due to a misoperation, occurred in the operation, many antennas failed in pre-conditionings for the first hundred days. The antenna failure rate was drastically decreased by using an antenna with coating thicker than a standard value and the pre-conditioning procedure repeating 15 min 25 kW RF-power operation and impurity-gas evacuation a few times, before the full power (50 kW) operation.

Authors:
; ; ; ;  [1]
  1. J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195 (Japan)
Publication Date:
OSTI Identifier:
22482949
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ANTENNAS; BEAMS; CESIUM; DESIGN; IMPURITIES; ION SOURCES; J-PARC; OPERATION

Citation Formats

Ueno, A., E-mail: akira.ueno@j-parc.jp, Ohkoshi, K., Ikegami, K., Takagi, A., Asano, H., and Oguri, H. Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H{sup −} ion source. United States: N. p., 2016. Web. doi:10.1063/1.4932323.
Ueno, A., E-mail: akira.ueno@j-parc.jp, Ohkoshi, K., Ikegami, K., Takagi, A., Asano, H., & Oguri, H. Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H{sup −} ion source. United States. https://doi.org/10.1063/1.4932323
Ueno, A., E-mail: akira.ueno@j-parc.jp, Ohkoshi, K., Ikegami, K., Takagi, A., Asano, H., and Oguri, H. 2016. "Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H{sup −} ion source". United States. https://doi.org/10.1063/1.4932323.
@article{osti_22482949,
title = {Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H{sup −} ion source},
author = {Ueno, A., E-mail: akira.ueno@j-parc.jp and Ohkoshi, K. and Ikegami, K. and Takagi, A. and Asano, H. and Oguri, H.},
abstractNote = {The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H{sup −} ion source has been successfully operated for about 1 yr. By the world brightest level beam, the J-PARC design beam power of 1 MW was successfully demonstrated. Although no internal-RF-antenna failure, except for the once caused by an excess cesium due to a misoperation, occurred in the operation, many antennas failed in pre-conditionings for the first hundred days. The antenna failure rate was drastically decreased by using an antenna with coating thicker than a standard value and the pre-conditioning procedure repeating 15 min 25 kW RF-power operation and impurity-gas evacuation a few times, before the full power (50 kW) operation.},
doi = {10.1063/1.4932323},
url = {https://www.osti.gov/biblio/22482949}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 2,
volume = 87,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2016},
month = {Mon Feb 15 00:00:00 EST 2016}
}