The Surface Activation Layer of GaAs Negative Electron Affinity Photocathode Activated by Cs, Li and NF3 [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 14 pages : digital, PDF file
- Additional Creators:
- Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The lifetime of GaAs photocathodes can be greatly improved by introducing Li in the Cs+NF₃ activation process. The surface activation layer of such photocathodes is studied by synchrotron radiation photoemission and is compared with GaAs photocathodes activated without Li. The charge distributions of N, F and Cs experience significant changes when Li is added in the activation. In addition, the presence of Li causes NFₓ molecules to take an orientation with F atoms on top. All these changes induced by Li hold the key for the lifetime improvement of GaAs photocathodes.
- Report Numbers:
- E 1.99:slac-pub-13810
- Other Subject(s):
- Published through SciTech Connect.
Submitted to Applied Physics Letters FT
Kirby, R.E.; Maruyama, T.; Sun, Yun; Pianetta, P.; Mulhollan, G.A.; Bierman, J.C.
- Funding Information:
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