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Persistent URL http://purl.org/net/epubs/work/42985
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Record Id 42985
Title The Development of the ISIS H- Surface Plasma Ion Source at RAL
Abstract ISIS H- Penning Surface Plasma Source (SPS) has been a world leading operational H- ion source for 20 years; it routinely produces 35 mA of H- ions during a 200 us pulse at 50 Hz for uninterrupted periods of up to 50 days. This paper details the development of the source that has occurred over the last 5 years. The pulse length has been increased from 200 μs to 1.5 ms and the output current doubled to 70 mA. These developments are required for the new Front End Test Stand (FETS) currently being built at RAL. Extensive three dimensional finite element modeling has allowed the thermal operation of the source to be understood in detail: the temperatures around the discharge region have been calculated and the transient thermal behavior of the pulsed source studied. This has allowed the source duty cycle to be significantly increased.Electromagnetic finite element analysis has allowed the source extraction and beam transport to be investigated. Different extraction geometries have been designed and successfully tested to give higher output currents. An energy analyzer and two emittance measurement systems (slit-slit and pepperpot) have been developed to allow the beam to be fully characterized. Several geometry and infrastructure modifications have been implemented and will be discussed.
Organisation CCLRC , ISIS , ASTeC-AP
Keywords Physics , Engineering , ISIS , Ion Source
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Language English (EN)
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Paper In Conference Proceedings In 18th Meeting of the International Collaboration on Advanced Neutron Sources (ICANS), Dongguan , Guangdong Province, China, 25-29 Apr 2007, (2007). 2007