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Title: Improvements on the stability and operation of a magnetron H − ion source

Journal Article · · Physical Review Accelerators and Beams
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The magnetron H- ion sources developed in the 1970s currently in operation at Fermilab provide beam to the rest of the accelerator complex. A series of modifications to these sources have been tested in a dedicated offline test stand with the aim of improving different operational issues. The solenoid type gas valve was tested as an alternative to the piezoelectric gas valve in order to avoid its temperature dependence. A new cesium oven was designed and tested in order to avoid glass pieces that were present with the previous oven, improve thermal insulation and fine tune its temperature. A current-regulated arc modulator was developed to run the ion source at a constant arc current, providing very stable beam outputs during operations. In order to reduce beam noise, the addition of small amounts of N2 gas was explored, as well as testing different cathode shapes with increasing plasma volume. This study summarizes the studies and modifications done in the source over the last three years with the aim of improving its stability, reliability and overall performance.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1360994
Alternate ID(s):
OSTI ID: 1346363
Report Number(s):
FERMILAB-PUB-17-009-AD; arXiv:1701.01757; PRABCJ; 050102
Journal Information:
Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Vol. 20 Journal Issue: 5; ISSN 2469-9888
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (4)

A new solid state extractor pulser for the FNAL magnetron ion source journal February 2016
Reduction of beam current noise in the FNAL magnetron ion source
  • Bollinger, D. S.; Karns, P. R.; Tan, C. Y.
  • FOURTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2014), AIP Conference Proceedings https://doi.org/10.1063/1.4916482
conference January 2015
A Direct Extraction H- Ion Source journal June 1977
Performance of the Magnetron H− Source on the BNL 200 MeV Linac
  • Alessi, James G.
  • HIGH INTENSITY AND HIGH BRIGHTNESS HADRON BEAMS: 20th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams ICFA-HB2002, AIP Conference Proceedings https://doi.org/10.1063/1.1522646
conference January 2002

Figures / Tables (23)

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