Characteristics of a thermionic RF gun have been studied by a 3-D simulation code developed using an FDTD (Finite Difference Time Domain) method as a Maxwell's equations solver . The gun is consists of two independent power feeding cavities, so that we call it “independently-tunable-cells (ITC)”-RF gun. The first cell is the cathode cell and the second one is an accelerating cell. The ITC gun can be operated at various modes of different RF-power ratio and phase between two cavities. Simulation study shows a velocity-bunching like effect may be occurred in the gun, so that the short pulse beam from the thermionic RF gun is a better candidate to produce the coherent THz synchrotron radiation. Expected bunch length with a total charge of ~ 20 pC (1 % energy width from the top energy) is around 200 fs (fwhm). Even the beam energy extracted from the gun is varied by which the input powers are changed, almost same shape of the longitudinal phase space can be produced by tuning the phase.
|Number of pages||3|
|Publication status||Published - 2020|
|Event||36th ICFA Advanced Beam Dynamics Workshop on Nano Scale Beams, NANOBEAM 2005 - Kyoto, Japan|
Duration: 2005 Oct 17 → 2005 Oct 21
|Conference||36th ICFA Advanced Beam Dynamics Workshop on Nano Scale Beams, NANOBEAM 2005|
|Period||05/10/17 → 05/10/21|