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An H- surface plasma source for the ESS storage ring
Journal of Instrumentation ( IF 1.3 ) Pub Date : 2024-03-06 , DOI: 10.1088/1748-0221/19/03/c03020
V. Dudnikov

For H- charge exchange (stripping) injection to European Spallation Source (ESS) storage ring it is necessary to have H- ion source with a current of ∼90 mA, pulses duration 3 ms, and repetition of 14 Hz (duty factor ∼4%) extendable to repetition up to 28 Hz (df ∼8%). Magnetron surface plasma H- source (SPS) with cesiation and active cathode and anode cooling is one of the possible solutions. Brookhaven National Laboratory (BNL) magnetron SPS can produce H- beam current of ∼100 mA at ∼2 kW discharge power and can operate up to a duty factor of ∼1% (average power ∼14 W) without the active cooling. With active cathode and anode cooling it is possible to increase average discharge power up to 140 W(df 8%).For the delivery of the beam to Radio Frequency Quadrupole (RFQ) it is possible to use a short electrostatic Low Energy Beam Transport (LEBT) as in Spallation Neutron Source (SNS).

中文翻译:

用于 ESS 存储环的 H 表面等离子体源

对于将 H -电荷交换(剥离)注入欧洲散裂源 (ESS) 存储环,需要使用电流为 ∼90 mA、脉冲持续时间为 3 ms、重复频率为 14 Hz(占空因数 ∼4)的 H - 离子。 %)可扩展到高达 28 Hz 的重复频率(df ∼8%)。具有铯化作用和活性阴极和阳极冷却的磁控管表面等离子体氢(SPS)是可能的解决方案之一。布鲁克海文国家实验室 (BNL) 磁控管 SPS 可以在 ~2 kW 放电功率下产生 ~100 mA 的 H电流,并且可以在不主动冷却的情况下运行高达 ~1% 的占空因数(平均功率 ~14 W)。通过主动阴极和阳极冷却,可以将平均放电功率提高至 140 W(df 8%)。为了将光束传输到射频四极杆 (RFQ),可以使用短静电低能量光束传输 ( LEBT)如散裂中子源(SNS)。
更新日期:2024-03-06
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