High-power experiment of a C-band photocathode gun

Abstract

The C-band electron gun is an attractive option for lower emittance with compactness. In this paper, a new C-band photocathode gun has been developed. The electron gun experienced high-power test, and has preliminary reached the designed gradient on the cathode, 150MV/m with a repetition rate of 10Hz and pulse length of 2.5μs. The gun shows the potential for better performance with a higher gradient during high-power operation. Under extreme conditions, the gradient on the cathode is about 180MV/m. These high-power experimental results are the basis of the beam dynamics iteration and beam testing.