Results from the second X-band RF gun

Abstract

A collaborative research effort between the Synchrotron Radiation Research Center (SRRC) and the UC Davis (UCD) is being put to improve the design and performance of the X-band (8548 MHz) rf gun. The fabrication and cold test will be performed at SRRC. The high power test will be conducted at UC Davis. The cold test results are presented.

Low emittance electron beam formation with a 17 GHz RF gun

“…This implies that a quadratic increase in the beam brightness with RF frequency can, in principle, be obtained. These favorable scaling laws coupled with the need for higher brightness beams have fueled an increasing interest in recent years in the use of high frequency RF guns, ranging from 8 GHz [4] to 17 GHz [5] and all the way up to 91 GHz [6]. However, the amount of experimental data from RF gun experiments operating above the SLAC frequency of 2.856 GHz has remained limited, making it difficult to verify that the ideal scaling laws, which rely on a number of assumptions such as proportionally higher accelerating gradients and emittance compensating magnetic fields, subpicosecond RF to laser timing stability, and tighter machine tolerances on manufactured parts, can be achieved in practice.…”