适用于日本质子加速器研究中心射频驱动H⁻离子源内部射频天线的预处理程序。

Pre-conditioning procedure suitable for internal-RF-antenna of J-PARC RF-driven H⁻ ion source.

作者信息

Ueno A, Ohkoshi K, Ikegami K, Takagi A, Asano H, Oguri H

机构信息

J-PARC Center, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan.

出版信息

Rev Sci Instrum. 2016 Feb;87(2):02B129. doi: 10.1063/1.4932323.

DOI:10.1063/1.4932323

PMID:26932011

Abstract

The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H(-) 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.

摘要

日本质子加速器研究设施（J-PARC）的铯化射频驱动H(-)离子源已成功运行约1年。凭借世界上亮度最高的束流，成功证明了J-PARC设计的1兆瓦束流功率。尽管在运行中除了一次因误操作导致铯过量而引起的内部射频天线故障外，没有发生其他故障，但在最初的一百天预调试中，许多天线出现了故障。通过使用涂层厚度超过标准值的天线，并在全功率（50千瓦）运行前重复进行15分钟25千瓦射频功率运行和杂质气体抽空几次的预调试程序，天线故障率大幅降低。