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TY - CONF AU - Chaisueb, N. AU - Kangrang, N. AU - Rimjaem, S. AU - Saisut, J. ED - Schaa, Volker RW TI - Characterization and Simulations of Electron Beams Produced From Linac-Based Intense THz Radiation Source J2 - Proc. of IBIC2016, Barcelona, Spain, Sept. 13-18, 2016 C1 - Barcelona, Spain T2 - International Beam Instrumentation Conference T3 - 5 LA - english AB - Electron beams with a maximum energy of 2.5 MeV and a macropulse current of 1 A are produced from a thermionic RF-gun of the linear accelerator system at Chiang Mai University, Thailand. An RF rectangular waveguide and a side coupling cavity of the RF gun introduce asymmetric field distribution inside the gun cavities. To investigate the effect of the asymmetric field distribution on electron beam production and acceleration, measurements and simulations of the electron beam properties were performed. In this study we use well calibrated current transformers, alpha magnet energy slits, and a Michelson interferometer to measure the electron pulse current, the beam energy, and the bunch length, respectively. This paper presents the measurement data of the electron beam properties at various location along the beam transport line and compares the results with the beam dynamic simulations by using the particle tracking program ELEGANT. Moreover, the RF field feature and the cathode power were optimized in order to achieve the high qualities of the electron beam produced from the RF gun. This result implies and correlates to the electron back-bombardment effect inside the gun cavities. PB - JACoW CP - Geneva, Switzerland SP - 131 EP - 134 KW - electron KW - gun KW - linac KW - cathode KW - radiation DA - 2017/02 PY - 2017 SN - 978-3-95450-177-9 DO - 10.18429/JACoW-IBIC2016-MOPG38 UR - http://jacow.org/ibic2016/papers/mopg38.pdf ER -