Title :
Photoelectron production in an X-band RF gun for free electron laser and nonlinear electron-photon scattering experiments
Author :
Hartemann, F.V. ; Le Sage, G.P. ; Bennett, C.V. ; Landahl, E.C. ; Luhmann, N.C., Jr
Author_Institution :
Dept. of Appl. Sci., California Univ., Davis, CA, USA
Abstract :
Summary form only given. A high brightness and short pulse electron source is under development for use in a free electron laser and in electron-photon scattering experiments. Accelerated photoelectrons have been produced from a 1.5 cell 8.5 GHz RF gun using an amplified 100 fs ultra-violet laser pulse. Ongoing improvements in the laser and RF system should result in achieving desired system performance: 5 MeV electrons in 1.5 ps, 1 nC bunches with a normalized RMS emittance of 2.5 mm-mrad. Electron bunches would be delivered in bursts of 100 pulses at 2.4 GHz every 10 Hz to drive a chirped pulse free electron laser. Such a microwave source, based on coherent emission of synchrotron radiation, could achieve power levels of 2.2 MW in a 15 ps FWHM pulse with a bandwidth extending from 125 to 225 GHz. The photoinjector will also provide an ideal source of relativistic electrons for investigating basic interactions: nonlinear Compton scattering, Kapitza-Dirac scattering and pondermotive scattering (laser acceleration).
Keywords :
electron guns; electron sources; free electron lasers; photon-electron interactions; synchrotron radiation; 1.5 ps; 100 fs; 125 to 225 GHz; 15 ps; 2.2 MW; 2.4 GHz; 5 MeV; 8.5 GHz; Kapitza-Dirac scattering; RF gun; X-band RF gun; accelerated photoelectrons; bandwidth; chirped pulse free electron laser; coherent emission; electron bunches; electron-photon scattering experiments; free electron laser; high brightness electron source; laser acceleration; microwave source; nonlinear Compton scattering; nonlinear electron-photon scattering experiments; normalized RMS emittance; photoelectron production; pondermotive scattering; relativistic electrons; short pulse electron source; synchrotron radiation; system performance; ultra-violet laser pulse; Acceleration; Brightness; Electron sources; Free electron lasers; Optical pulses; Production; Pulse amplifiers; Radio frequency; Scattering; System performance;
Conference_Titel :
Plasma Science, 1998. 25th Anniversary. IEEE Conference Record - Abstracts. 1998 IEEE International on
Conference_Location :
Raleigh, NC, USA
Print_ISBN :
0-7803-4792-7
DOI :
10.1109/PLASMA.1998.677776
