Status report on a dc 130 mA, 75 keV proton injector (invited)
- 1 February 1998
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 69 (2) , 1003-1008
- https://doi.org/10.1063/1.1148706
Abstract
A 110 mA, 75 keV dc proton injector is being developed at Los Alamos. A microwave proton source is coupled to a two solenoid, space-charge neutralized, low-energy beam transport (LEBT) system. The ion source produces 110 mA proton current at 75 keV using 600–800 W of 2.45 GHz discharge power. Typical proton fraction is 85%–90% of the total extracted ion current, and the rms normalized beam emittance after transport through a prototype 2.1 m LEBT is 0.20 (πmm mrad). Beam space-charge neutralization is measured to be >98% which enables the solenoid magnetic transport to successfully match the injector beam into a radio-frequency quadrupole. Beam simulations indicate small emittance growth in the proposed 2.8 m low-energy demonstration accelerator LEBT. The LEBT also contains beam diagnostics, steering, and a beam deflector for variable duty factor and accelerator fast protect functions. The injector beam availability status is also discussed.Keywords
This publication has 11 references indexed in Scilit:
- Physics of ion beam plasma and problems of intensive ion beam transportation (invited)a)Review of Scientific Instruments, 1996
- Production of high-brightness continuous wave proton beams with very high proton fractionsa)Review of Scientific Instruments, 1996
- Microwave proton source development for a high-current linac injector (invited)a)Review of Scientific Instruments, 1996
- An advanced high-current low-emittance dc microwave proton sourceNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1993
- The PSI 870 keV high intensity Cockcroft–Walton preinjectorReview of Scientific Instruments, 1992
- High-current negative-ion beam transportAIP Conference Proceedings, 1992
- A high-current low-emittance dc ECR proton sourceNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991
- Factors determining dissociation fractions in atomic beams generated by ‘‘straight-through’’ microwave discharge sourcesReview of Scientific Instruments, 1988
- Dependence of emittance degradation on beam angular momentum for charge exchange in solenoidsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1987
- Model of positive ion sources for neutral beam injectionJournal of Applied Physics, 1983