直线加速器4氢离子源。

Linac4 H⁻ ion sources.

作者信息

Lettry J, Aguglia D, Alessi J, Andersson P, Bertolo S, Briefi S, Butterworth A, Coutron Y, Dallocchio A, David N, Chaudet E, Faircloth D, Fantz U, Fink D A, Garlasche M, Grudiev A, Guida R, Hansen J, Haase M, Hatayama A, Jones A, Koszar I, Lallement J-B, Lombardi A M, Machado C, Mastrostefano C, Mathot S, Mattei S, Moyret P, Nisbet D, Nishida K, O'Neil M, Paoluzzi M, Scrivens R, Shibata T, Steyaert D, Thaus N, Voulgarakis G

机构信息

CERN-ABP, 1211 Geneva 23, Switzerland.

Brookhaven National Laboratory, BNL-CA, Upton, New York 11973, USA.

出版信息

Rev Sci Instrum. 2016 Feb;87(2):02B139. doi: 10.1063/1.4936120.

DOI:10.1063/1.4936120

PMID:26932021

Abstract

CERN's 160 MeV H(-) linear accelerator (Linac4) is a key constituent of the injector chain upgrade of the Large Hadron Collider that is being installed and commissioned. A cesiated surface ion source prototype is being tested and has delivered a beam intensity of 45 mA within an emittance of 0.3 π ⋅ mm ⋅ mrad. The optimum ratio of the co-extracted electron- to ion-current is below 1 and the best production efficiency, defined as the ratio of the beam current to the 2 MHz RF-power transmitted to the plasma, reached 1.1 mA/kW. The H(-) source prototype and the first tests of the new ion source optics, electron-dump, and front end developed to minimize the beam emittance are presented. A temperature regulated magnetron H(-) source developed by the Brookhaven National Laboratory was built at CERN. The first tests of the magnetron operated at 0.8 Hz repetition rate are described.

摘要

欧洲核子研究中心（CERN）的160兆电子伏特负氢离子直线加速器（Linac4）是正在安装和调试的大型强子对撞机注入器链升级的关键组成部分。一个涂铯表面离子源原型正在进行测试，在发射度为0.3π·毫米·毫弧度的情况下，已产生了45毫安的束流强度。共引出电子流与离子流的最佳比率低于1，最佳生产效率（定义为束流与传输到等离子体的2兆赫兹射频功率之比）达到了1.1毫安/千瓦。本文介绍了负氢离子源原型以及为最小化束流发射度而开发的新离子源光学系统、电子Dump和前端的首次测试。由布鲁克海文国家实验室开发的温度调节磁控管负氢离子源在欧洲核子研究中心建造完成。文中描述了以0.8赫兹重复频率运行的磁控管的首次测试情况。