Gas injection and fast pressure-rise measurements for the Linac4 H - source
Gas injection and fast pressure-rise measurements for the Linac4 H - source
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Linac4 H 源的气体注入和快速升压测量
DOI：
10.1063/1.4792812
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
C. Schmitzer
中科院分区：
文献类型：
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作者：
E. Mahner;P. Chiggiato;J. Lettry;S. Mattei;M. O’Neil;H. Neupert;C. Pasquino;C. Schmitzer
在大型强子对撞机的时代，欧洲核子研究中心的注入器复合体包括34岁的Linac 2及其主要质子源，目前正在升级一个新的H-线性加速器（Linac 4）。目前正在设计、建造和测试批量生产和铯化的射频驱动H−离子源，最终目标是产生一个具有80 mA束流、45 keV束流能量、500 μs脉冲长度和2 Hz重复频率的H−束流。为了获得等离子体点火瞬间氢气密度的定量信息，对等离子体发生器的动态真空特性进行了实验研究。我们描述了实验装置，并提出了快速的压力上升测量的气体喷射系统的不同参数，如气体种类（H2，He，N2，Ar），压电阀电压脉冲长度（200 - 500 μs），和注射压力（400 - 2800毫巴）。所获得的数据进行了比较与等离子体发生器的电导模型。
In the era of the Large Hadron Collider, the CERN injector complex comprising the 34 years old Linac2 with its primary proton source, is presently upgraded with a new linear accelerator for H− (Linac4). The design, construction, and test of volume production and cesiated RF-driven H− ion sources is presently ongoing with the final goal of producing an H− beam with 80 mA beam current, 45 keV beam energy, 500 μs pulse length, and a repetition rate of 2 Hz. In order to have quantitative information of the hydrogen gas density at the moment of plasma ignition the dynamic vacuum properties of the plasma generator were studied experimentally. We describe the experimental setup and present fast pressure-rise measurements for different parameters of the gas injection system, such as gas species (H2, He, N2, Ar), piezo valve voltage pulse length (200 - 500 μs), and injection pressure (400 - 2800 mbar). The obtained data are compared with a conductance model of the plasma generator.