Cryocooler Technology for Electron Particle Accelerators

Particle accelerator technology is ubiq uitous in modern discovery science. Accelerators are no longer limited to the more well-known high energy physics applications. They are of vital importance to many diverse fields as far reaching as biology, chemistry, condensed matter physics, medicine, and industrial manufacturing procedures. It has then of the utmost importance to develop better understanding of the physics and engineering principles necessary for advanced particle accelerator design. The Particle B eam Physics L aboratory (PB PL ) at the University of California, L os Angeles (UCL A) is at the forefront of this research. O ne major thrust in accelerator physics in general and PB PL in particular is the application of cryogenic technology to accelerators. The presentation will focus on the use of cryogenic technology in general accelerator R& D research as well as particular developments taking place at UCLA. Discussions will introduce general improvements of figures of merit such as beam brightness ex pected to come from cryogenic operations. In particular, three ex periments utilizing cryocoolers will be presented: two radiofreq uency (RF) resonant cavity tests of normal conducting copper at cryogenic temperatures, at low and high RF power, and one integrated test bed for studies of photoemission at cryogenic temperatures.