Fine-tuning to minimize emittances of J-PARC RF-driven H{sup −} ion source
Journal Article
·
· Review of Scientific Instruments
- J-PARC Center, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-1195 (Japan)
The Japan Proton Accelerator Research Complex (J-PARC) cesiated RF-driven H{sup −} ion source has been successfully operated for about one year. By the world’s brightest level beam, the J-PARC design beam power of 1 MW was successfully demonstrated. In order to minimize the transverse emittances, the rod-filter-field (RFF) was optimized by changing the triple-gap-lengths of each of pairing five piece rod-filter-magnets. The larger emittance degradation seems to be caused by impurity-gases than the RFF. The smaller beam-hole-diameter of the extraction electrode caused the more than expected improvements on not only the emittances but also the peak beam intensity.
- OSTI ID:
- 22482950
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 87; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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