Photoinjector beam quality improvement by shaping the wavefront of a drive laserwith oblique incidence
- Received Date: 2011-08-31
- Accepted Date: 2011-09-22
- Available Online: 2012-06-05
Abstract: To increase the quantum efficiency (QE) of a copper photocathode and reduce the thermal emittance of an electron beam, a drive laser with oblique incidence was adopted in a BNL type photocathode rf gun. The disadvantageous effects on the beam quality caused by oblique incidence were analyzed qualitatively. A simple way to solve the problems through wavefront shaping was introduced and the beam quality was improved.