학술논문
High-current, high-duty-factor experiments with the H ion source for the Spallation Neutron Source
Document Type
Conference
Author
Source
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366) Particle accelerator conference Particle Accelerator Conference, 1999. Proceedings of the 1999. 3:1911-1913 vol.3 1999
Subject
Language
Abstract
The ion source for the 1 MW Spallation Neutron Source (SNS) is required to provide 35 mA of H/sup -/ beam current at 6% duty factor (1 ms pulses at 60 Hz) with a normalized rms emittance less than 0.15 /spl pi/ mm mrad. The H/sup -/ beam will be accelerated to 65 keV and matched into a 2.5 MeV RFQ. The ion source is expected to ultimately produce 70 mA of H/sup -/ at 6% duty factor when the SNS is upgraded to 2 MW of power. For this application, a radio-frequency driven, magnetically filtered multicusp source is being developed at Berkeley Lab. The design of this new ion source is directed towards operation at the required high duty factor. Experimental results of the ion source operated in pure volume production mode (without cesium) and in hybrid mode (with cesium released into the source) are compared. An improved cesium dispensing system is presented.