STATUS-REPORT ON A DC 130 MA, 75 KEV PROTON INJECTOR (INVITED)

A 110 mA, 75 keV de proton injector is being developed at Los Alamos. A microwave proton source is coupled to a two solenoid, space-charge n eutralized, low-energy beam transport (LEBT) system. The ion source pr oduces 110 mA proton current at 75 keV using 600-800 W of 2.45 GHz dis charge power. Typical proton fraction is 85%-90% of the total extracte d ion current, and the rms normalized beam emittance after transport t hrough a prototype 2.1 m LEBT is 0.20 (pi mm mrad). Beam space-charge neutralization is measured to be >98% which enables the solenoid magne tic transport to successfully match the injector beam into a radio-fre quency quadrupole. Beam simulations indicate small emittance growth in the proposed 2.8 m low-energy demonstration accelerator LEBT. The LEB T also contains beam diagnostics, steering, and a beam deflector for v ariable duty factor and accelerator fast protect functions. The inject or beam availability status is also discussed. (C) 1998 American Insti tute of Physics.