Title :
Testing of a high current DC ESQ accelerator
Author :
Kwan, J.W. ; Ackerman, G.D. ; Anderson, O.A. ; Chan, C.F. ; Cooper, W.S. ; deVries, G.J. ; Kunkel, W.B. ; Soroka, L. ; Steele, W.F. ; Wells, R.P.
Author_Institution :
Lawrence Berkeley Lab., California Univ., CA, USA
Abstract :
A high current DC electrostatic quadrupole (ESQ) accelerator is being developed for negative-ion-based neutral beam heating and current drive on the next generation tokamak. Beam energy and current will eventually be in the megaelectronvolt and multiampere range. This constant-current variable-voltage (CCVV) accelerator uses a series of identical ESQ modules. The authors have successfully tested a prototype CCVV accelerator up to 200 keV with a 100-mA He/sup +/ beam (with space charge equivalence of 140 mA of D/sup -/) for a pulse length of 1 s. Testing was also done with a 42-mA H/sup -/ beam (H/sup -/ beam current was limited by source performance). There was almost no beam loss in the ESQ accelerator.<>
Keywords :
electrostatic accelerators; proton accelerators; CCVV; H/sup -/ beam; He/sup +/ beam; constant-current variable-voltage; current drive; high current DC ESQ accelerator; high current DC electrostatic quadrupole; megaelectronvolt; multiampere range; negative-ion-based neutral beam heating; next generation tokamak; pulse length; space charge; Acceleration; Electrostatics; Heating; Helium; Life estimation; Particle beams; Prototypes; Space charge; Testing; Tokamaks;
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.1991.164834
