Celona L, Ciavola G, Consoli F, Gammino S, Maimone F, Mascali D, Spädtke P, Tinschert K, Lang R, Mäder J, Robbach J, Barbarino S, Catalano R S
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Via S. Sofia 62, 95123 Catania, Italy.
Rev Sci Instrum. 2008 Feb;79(2 Pt 1):023305. doi: 10.1063/1.2841694.
A set of measurements with the CAPRICE ion source at the GSI test bench has been carried out to investigate its behavior in terms of intensity and shape of the extracted beam when the microwaves generating the plasma sweep in a narrow range of frequency (+/-40 MHz) around the klystron center frequency (14.5 GHz). Remarkable variations have been observed depending on the source and the beamline operating parameters, confirming that a frequency dependent electromagnetic distribution is preserved even in the presence of plasma inside the source. Moreover, these observations confirm that the frequency tuning is a powerful method to optimize the electron cyclotron resonance ion source performances. A description of the experimental setup and of the obtained results is given in the following.
在GSI测试台上使用CAPRICE离子源进行了一组测量，以研究当产生等离子体的微波在速调管中心频率（14.5 GHz）附近的窄频率范围（±40 MHz）内扫描时，其在引出束流的强度和形状方面的表现。根据源和束流线的运行参数观察到了显著变化，证实即使源内部存在等离子体，频率相关的电磁分布仍得以保留。此外，这些观察结果证实频率调谐是优化电子回旋共振离子源性能的有效方法。以下给出了实验装置和所得结果的描述。
