Cathode R&D for Future Light Sources
This paper reviews the requirements and current status of cathodes for accelerator applications, and proposes a research and development plan for advancing cathode technology. Accelerator cathodes need to have long operational lifetimes and produce electron beams with a very low emittance. The two principal emission processes to be considered are thermionic and photoemission with the photocathodes being further subdivided into metal and semi-conductors. Field emission cathodes are not included in this analysis. The thermal emittance is derived and the formulas used to compare the various cathode materials. To date, there is no cathode which provides all the requirements needed for the proposed future light sources. Therefore a three part research plan is described to develop cathodes for these future light source applications.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 979945
- Report Number(s):
- SLAC-PUB-14002; TRN: US1003414
- Journal Information:
- Submitted to Nuclear Instrumentation and Methods (NIM) A, Journal Name: Submitted to Nuclear Instrumentation and Methods (NIM) A; ISSN 0168-9002
- Country of Publication:
- United States
- Language:
- English
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