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Title: A 75-keV, 145-mA PROTON INJECTOR


No abstract prepared.

; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
Report Number(s):
TRN: US0302072
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jul 2001
Country of Publication:
United States

Citation Formats

J. D. SHERMAN, T. L. FIGUEROA, and ET AL. A 75-keV, 145-mA PROTON INJECTOR. United States: N. p., 2001. Web.
J. D. SHERMAN, T. L. FIGUEROA, & ET AL. A 75-keV, 145-mA PROTON INJECTOR. United States.
J. D. SHERMAN, T. L. FIGUEROA, and ET AL. 2001. "A 75-keV, 145-mA PROTON INJECTOR". United States. doi:.
title = {A 75-keV, 145-mA PROTON INJECTOR},
author = {J. D. SHERMAN and T. L. FIGUEROA and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2001,
month = 7

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  • A compact proton accelerator for cancer treatment is being developed by using the high-gradient dielectric insulator wall (DWA) technology [1-4]. We are testing all the essential DWA components, including a compact proton source, on the First Article System Test (FAST). The configuration and progress on the injector and FAST will be presented.
  • A new high-current H/sup -/ injector has been installed at LAMPF for the Proton Storage Ring. The injector is equipped with a multicusp surface-production H/sup -/ ion source that was developed at LAMPF. The ion source is capable of long-term operation at 20 mA of H/sup -/ current at 10% duty factor and with normalized beam emittance of 0.08 cm-mrad (95% beam fraction). Details of the development program, the injector design, and initial operating experience are discussed. Included in the discussion is a comparison of intensity and emittance measurements of the same H/sup -/ beam at 100 keV and 750more » keV. 4 references, 6 figures.« less
  • Powerful CW proton linear accelerators (100-mA at 0.5--1.0 GeV) are being proposed for spallation neutron-source applications. A 75-keV, 110-mA dc proton injector using a microwave ion source is being tested for these applications. It has achieved 80-keV, 110-mA hydrogen-ion-beam operation. Video and dc beam-current toroid diagnostics are operational, and an EPICS control system is also operational on the 75-keV injector. A technical base development program has also been carried out on a 50-keV injector obtained from Chalk River Laboratories, and it includes low-energy beam transport studies, ion source lifetime tests, and proton-fraction enhancement studies. Technical base results and the presentmore » status of the 75-keV injector will be presented.« less
  • A 75-keV dc and pulsed-mode proton injector is being developed for beam testing of a 100-mA, 6.7-MeV cw radio frequency quadrupole (RFQ) at Los Alamos. A microwave proton source operating at 2.45 GHz produces 130-mA hydrogen-ion beam currents with > 85% proton fraction, yielding the 110-mA proton current required at the RFQ injection point. Doppler-shift spectroscopy confirms previously measured proton fractions. The discharge may be pulsed by current modulation of the magnetron power supply. A 1-MHz coherent oscillation observed in the extracted ion beam was eliminated by selecting proper magnetron operation. Transport and matching of the proton beam to themore » RFQ is accomplished by a two-solenoid, beam space-charge neutralized low-energy beam transport (LEBT) system. The injector was temporarily reconfigured to operate at 50 keV for injector matching studies into a 1.25 MeV cw RFQ. A maximum current of 100-mA has been accelerated through the RFQ in cw mode.« less