Title :
Design of a compact high current density injector for heavy ion fusion
Author :
Kwan, J.W. ; Henestroza, E. ; Ahle, L. ; Grote, D.P.
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
Abstract :
A compact multiple-beam injector concept is being developed for heavy ion inertial fusion. The design is based on merging high intensity miniature beamlets of a few mA each to form a large beam. In order to minimize emittance growth, the beamlets are kept separated in grids until they are allowed to merge together at 1.2 MeV. With optimized positioning and aiming, the merged beam can quickly match into an electrostatic quadrupole (ESQ) channel. Simulation results have shown that, based on this design, a 1.6 MeV, 0.5 A beam of K+ ions at the end of the injector has a normalized emittance of approximately 1.0 π-mm-mrad which is comparable to that from the previous low current density design. The advantage is a factor of 6 reduction in the combined injector and matching section length
Keywords :
accelerator magnets; electromagnets; ion accelerators; particle beam fusion accelerators; particle beam injection; plasma inertial confinement; 0.5 A; 1.2 MeV; 1.6 MeV; ESQ; K; K+ ions; compact high current density injector; electrostatic quadrupole; emittance growth; heavy ion inertial fusion; high intensity miniature beamlets; multiple-beam injector; normalized emittance; simulation; Brightness; Current density; Electrostatics; Ion beams; Ion sources; Laboratories; Linear particle accelerator; Merging; Physics; Temperature;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987291
