Development of an electron gun capable of producing low emittance is in the interests of further applications of high brightness electron beam such as Smith-Purcell FEL  for example. A prominent point of this DC gun is that operation high voltage is very low (50 kV). Since a higher beam current of the macropulse is required in general, a cathode should have higher current density, while the smaller size of the cathode is preferred for lower emittance. Consequently we have chosen single crystal LaB6 as the cathode, which can provide higher current with good homogeneity emission. Some numerical calculations have also been performed. There are some good agreement in calculated results between them. Numerical calculations show a normalized rms emittance is expected to be less than 5 π mm mrad. A state-of-the-art electron source will possibly open new scientific opportunities in the many fields.
|Number of pages
|Published - 2006
|28th International Free Electron Laser Conference, FEL 2006 - Berlin, Germany
Duration: 2006 Aug 27 → 2006 Sept 1
|28th International Free Electron Laser Conference, FEL 2006
|06/8/27 → 06/9/1