Title :
Design and modeling of a 17 GHz photocathode RF gun
Author :
Lin, C.L. ; Chen, S.C. ; Wurtele, J.S. ; Temkin, R. ; Danly, B.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
Abstract :
The performance of a high-frequency (17-GHz), high accelerating gradient (250 MV/m) photocathode RF gun is studied with the particle-in-cell code MAGIC. For the parameter regime of interest, i.e., bunch charge smaller than 1 nC and bunch length shorter than 2 ps, space-charge forces and finite-bunch-length effects are less significant in determining the beam quality than nonlinear RF forces are. The cavity geometry, RF phase for photoemission, cathode size, and current density are being optimized to obtain high-quality beams. Preliminary results are presented.<>
Keywords :
electron guns; electron sources; photocathodes; 17 GHz; beam quality; bunch charge; cavity geometry; finite-bunch-length effects; particle-in-cell code MAGIC; photocathode RF gun; photoemission; space-charge forces; Acceleration; Brightness; Cathodes; Current density; Electric breakdown; Electrons; Laser beams; Photoelectricity; Radio frequency; Shape;
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.1991.164858
