Title :
Time dependent beam focusing at the DARHT-II injector diode
Author :
Eylon, S. ; Henestroza, E. ; Fawley, W. ; Yu, S.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
Abstract :
The injector for the second axis of the Dual-Axis Radiographic Hydrotest Facility (DARHT) is being designed and constructed at LBNL. The injector consists of a single gap diode extracting 2 μs, 2 kA, 3.2 MeV electron beam from a 6.5 inches diameter thermionic dispenser cathode. The injector is powered through a ceramic column by a Marx generator. We also investigated the possibility of extracting a beam current of 4 kA. The focusing system for the electron beam consists of a Pierce electrostatic focusing electrode at the cathode and three solenoidal focusing magnets positioned between the anode and induction accelerator input
Keywords :
accelerator magnets; collective accelerators; electromagnets; electron accelerators; electron beam focusing; electrostatic devices; particle beam extraction; particle beam injection; pulse generators; radiography; test facilities; thermionic electron emission; 2 kA; 2 mus; 3.2 MeV; 4 kA; 6.5 in; DARHT-II injector diode; Dual-Axis Radiographic Hydrotest Facility; Marx generator; Pierce electrostatic focusing electrode; ceramic column; electron beam; linear induction accelerator; single gap diode extraction; solenoidal focusing magnets; thermionic dispenser cathode; time dependent beam focusing; Cathodes; Ceramics; Diodes; Electrodes; Electron beams; Electrostatics; Induction generators; Magnets; Power generation; Radiography;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.794319
