Title :
Experimental status of the 2 MeV 17 GHz RF gun at MIT
Author :
Kesar, Amit ; Haimson, J. ; Korbly, S. ; Mastovsky, I. ; Mecklenburg, B. ; Temkin, Richard J.
Author_Institution :
Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA
Abstract :
Summary form only given. High frequency photocathode injectors (RF Guns) are important as sources for ultra-relativistic colliders due to their high brightness electron bunch output. A 3 cell 17 GHz RF Gun designed and built at Haimson Research Corporation (HRC) is being tested at MIT Plasma Science and Fusion Center. A 1 ps, 15 micro-joule laser pulse is injected into the back of the first cell in order to emit the electron bunch. The driving power into the RF Gun is supplied by an HRC 17 GHz relativistic klystron and is coupled into the middle cell by dual RF ports. This cell has a racetrack geometry design in order to achieve a highly symmetrized TM/sub 01/ pi-mode operation which is necessary for reducing the emittance. The diagnostic setup consists of a slit array, YAG screen and a CCD camera for beam imaging and emittance measurement, and deflecting coils and a Faraday Cup for energy and bunch charge measurement, respectively. The RF Gun is currently processed to input power of 1 MW for 70 ns. Our goal is to drive it up to 3 MW and 100 ns pulses to produce a peak axial electric field of 200 MV/m in its cells and provide a 2 MeV energy gain. An update on the experimental results will be presented.
Keywords :
charge measurement; electron sources; particle beam bunching; particle beam diagnostics; particle beam injection; photocathodes; plasma diagnostics; plasma guns; plasma sources; 1 MW; 1 ps; 100 ns; 15 muJ; 17 GHz; 2 MeV; 3 MW; 70 ns; CCD camera; Faraday cup; RF gun; TM/sub 01/ pi-mode operation; YAG screen; beam imaging; bunch charge measurement; deflecting coils; driving power; emittance measurement; high brightness electron bunch; high frequency photocathode injectors; laser pulse; racetrack geometry design; relativistic klystron; slit array; ultrarelativistic colliders; Brightness; Cathodes; Charge measurement; Electron guns; Laser fusion; Laser theory; Nuclear and plasma sciences; Optical pulses; Radio frequency; Testing;
Conference_Titel :
Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-8334-6
DOI :
10.1109/PLASMA.2004.1339949