Title :
Characteristics of the H-/D- beam extracted from an RF-driven volume source
Author :
Gammel, G. ; Debiak, T. ; Sredniawski, J. ; Leung, K. ; McDonald, D.
Author_Institution :
Grumman Corp., Bethpage, NY, USA
Abstract :
The characteristic of the D/sup -/ beam produced in an RF-driven multicusp volume source are reported as a function of source power and equivalent current. These characteristics are compared to those of H/sup -/ beams from RF-driven sources, and to those of H/sup -/ and D/sup -/ from filament-based sources. At the same equivalent H/sup -/ current, the normalized RMS emittance using the RF antenna was about the same as that using filaments. At the optimum filter field strength, the D/sup -/ current was up to 20-30% higher. Since the optimum filter field strength was higher with RF, the electron-to-D/sup -/ current ration was lower with RF. All these findings favor the use of RF to form a high-brightness negative ion beam.<>
Keywords :
hydrogen ions; ion sources; RF antenna; RF-driven multicusp volume source; filament-based sources; high-brightness negative ion beam; normalized RMS emittance; optimum filter field strength; Argon; Charge measurement; Current measurement; Filters; Geometry; Noise level; Pressure measurement; Radio frequency; Space charge; Xenon;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164857
