Emittance improvement of the electron cyclotron resonance high intensity light ion source proton beam by gas injection in the low energy beam transport
Emittance improvement of the electron cyclotron resonance high intensity light ion source proton beam by gas injection in the low energy beam transport
复制标题
低能束流输运中气体注入提高电子回旋共振高强度轻离子源质子束的发射率
DOI：
10.1063/1.1150448
复制
发表时间：
2000
影响因子：
1.6
通讯作者：
J. Sherman
中科院分区：
文献类型：
--
作者：
P. Beauvais;R. Ferdinand;R. Gobin;J. Lagniel;P. Leroy;L. Celona;G. Ciavola;S. Gammino;B. Pottin;J. Sherman
SILHI是法国C.E.A.研究的ECR高强度轻离子源。萨克雷这是CNRS-IN 2 P3合作开发的高强度质子注入器原型的注入器的来源。在95 keV能量下，束流电流为80 mA，均方根归一化r-r′发射度低于0.3 π mm mrad，质子率优于85%。 最近，已经发现，在低能量束传输的缓冲气体的注射有强烈的影响，测量1米的聚焦螺线管下游的发射度。通过添加几种气体（H2、N2、Ar、Kr），已经观察到高达3倍的改进。 发射度是通过一个r-r′发射度测量装置测量的，该装置配有一个取样孔和一个导线轮廓监测器，两者都在束流中移动。同时，使用四栅极分析仪单元测量空间电荷补偿因子。在这篇文章中，这些实验的所有结果，并进行了讨论。第一个解释的发射率r…
SILHI is the ECR high intensity light ion source studied in France at C.E.A. Saclay. This is the source for the injector of the high intensity proton injector prototype developed by a CNRS-IN2P3 collaboration. 80 mA at 95 keV beams with a rms normalized r–r′ emittance lower than 0.3 π mm mrad and a proton fraction better than 85% are currently produced. Recently, it has been found that the injection in the low energy beam transport of a buffer gas had a strong effect on the emittance measured 1 m downstream of the focusing solenoid. By adding several gases (H2, N2, Ar, Kr), improvements as great as a factor of 3 have been observed. The emittance has been measured by means of an r–r′ emittance measurement unit equipped with a sampling hole and a wire profile monitor, both moving across the beam. Simultaneously, the space charge compensation factor is measured using a four-grid analyzer unit. In this article all results of these experiments are presented and discussed. A first explanation of the emittance r...