H- Ion Source Development for the FNAL 750keV Injector Upgrade
- Fermilab
The new FNAL 750keV injector upgrade for the replacement of the 40 year old Fermi National Laboratory (FNAL) Cockcroft-Walton accelerators with a new ion source and 200MHz Radio Frequency Quadrupole (RFQ), Low Energy Beam Transport (LEBT) and Medium Energy Beam Transport (MEBT) [1], has been built and is now being tested prior to installation during the 2012 shutdown. The new H-' ion source is a round aperture magnetron which was developed at Brookhaven National Lab (BNL) by Jim Alessi[2]. Operational experience from BNL has shown that this type of source is more reliable with a longer lifetime (on the order of 6 to 9 months) due to better power efficiency. With a similar duty factor to BNL, we expect to have a comparable lifetime between source changes. The new source design reliably produces 90mA of H-' beam current at 15Hz rep-rate, 250mus pulse width, and a duty factor of 0.38%A The measured emittances at the end of the LEBT are horizontally H = 0.21I mm- mrad and vertically V = 0.17I mm- mrad. With 35kV extraction the power efficiency is 60mA/kW. The source design, along with data from a test stand and the LEBT, will be presented in this paper.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1764041
- Report Number(s):
- FERMILAB-CONF-12-476-AD; oai:inspirehep.net:1184683
- Journal Information:
- AIP Conf.Proc., Vol. 1515, Issue 1
- Country of Publication:
- United States
- Language:
- English
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