Title :
Production of high brightness electron beams with a 17 GHz RF gun
Author :
Brown, W.J. ; Korbly, S.E. ; Kreischer, K.E. ; Mastovsky, I. ; Temkin, R.J.
Author_Institution :
Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA
Abstract :
We report on beam measurement results from the MIT 17 GHz RF gun experiment. Tests of a 1.5 cell RF gun have been completed, with bunch charges up to 0.1 nC and beam energies up to 1 MeV produced. The normalized rms emittance of the beam after 35 cm of transport from the gun has been measured to be about 3 πmm mrad for a 50 pC bunch. This agrees with PARMELA simulations at these beam energies, and can be shown to correspond to a beam brightness of about 80 A/(πmm mrad)2 at the gun exit. Results of a 2.4 cell 17 GHz RF gun are also reported. This gun has been built and cold tested and high power RF conditioning has begun. The gun is designed to produce a 2 MeV beam with peak accelerating gradients of 200 MV/m. After emittance compensation, simulations predict a 0.1 nC bunch with a normalized emittance of 0.5 πmm mrad can be produced, corresponding to a beam brightness of 800 A/(πmm mrad)2
Keywords :
electron guns; electron sources; particle beam diagnostics; 1 MeV; 17 GHz; 2 MeV; PARMELA; RF gun; beam brightness; emittance compensation; high brightness electron beams; normalized rms emittance; Acceleration; Brightness; Cathodes; Electron beams; Optical pulse generation; Particle beams; Production; Pulse amplifiers; Radio frequency; Testing;
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.2001.987339
