Title :
A volume H- ion source with a toroidal discharge chamber
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
A new volume H- ion source has been designed with the objective of reaching a current of 50 mA in 1-ms pulses, to be eventually used on the new RF quadrupole (RFQ) preinjector at Brookhaven National Laboratory´s Alternating Gradient Synchrotron. Its main feature is a full rotation symmetry, with a toroidal discharge chamber separated from the central extraction region by a conically shaped dipole field. Preliminary studies consisted of measurements of the H- yield and the accompanying electron component as a function of the discharge current, discharge voltage, pressure, and extraction voltage for several geometries of the conical field; effects of the filament heating current were also studied, both for DC and AC cases. It was possible to extract an H- current of 30 mA through an aperture of 1 cm2, with an electron component of about 750 mA
Keywords :
hydrogen ions; ion sources; 1 ms; Alternating Gradient Synchrotron; H- yield; RFQ preinjector; conically shaped dipole field; filament heating current; full rotation symmetry; toroidal discharge chamber; volume H- ion source; Current measurement; Electrons; Fault location; Geometry; Ion sources; Laboratories; Pressure measurement; Radio frequency; Synchrotrons; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73169
