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Study on Thermionic RF Electron Gun after Retuning Process

Research paper by N Chaisueb, N Kangrang, J Saisut, C Thongbai, P Wichaisirimongkol S Rimjaem

Indexed on: 21 Dec '18Published on: 17 Dec '18Published in: Journal of physics. Conference series



Abstract

Relativistic femtosecond electron bunches can be produced from the electron accelerator system at the PBP-CMU Electron Linac Laboratory of the Plasma and Beam Physics (PBP) Research Facility, Chiang Mai University (CMU). A thermionic radio-frequency (RF) gun is used as an electron source for this accelerator. The RF gun has a 1.6-cell standing-wave structure with side-coupling cavity. The 2856 MHz RF wave is transmitted from the klystron to the gun through a waveguide system. So far, two RF guns have been used at our laboratory. The first gun was designed and constructed mostly in Thailand. The second one was constructed at the National Synchrotron Radiation Research Center (NSRRC), Taiwan, R.O.C. It was then transported from the NSRRC to our laboratory and was tested after the cavity retuning process. The low-level and high-level RF measurements were conducted. This gun has a resonant frequency of 2855.68 MHz at 26.2°C with a quality factor of 12264. The high-power RF measureme...