Coherent light generators – Free electron laser
Patent
1997-08-20
1999-03-30
Scott, Jr., Leon
Coherent light generators
Free electron laser
372 9, H01S 300
Patent
active
058897976
ABSTRACT:
A method is provided for directly determining the length of sub-picosecond electron bunches. A metallic grating is formed with a groove spacing greater than a length expected for the electron bunches. The electron bunches are passed over the metallic grating to generate coherent and incoherent Smith-Purcell radiation. The angular distribution of the coherent Smith-Purcell radiation is then mapped to directly deduce the length of the electron bunches.
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patent: 4596967 (1986-06-01), Ekdahl
patent: 4727550 (1988-02-01), Chang et al.
Ishi et al; "Observation of coherent Smith-Purcell radiation for short bunched electrons";Physical Review E,vol. 5t1, No. 6; Jun. 1995.
K. Ishi, Y. Shibata, T. Takahashi, S. Hasebe, M. Ikezawa, K. Takami, T. Matsuyama, K. Kobayshi, and Y. Fujita, "Observation of Coherent Smith-Purcell Radiation From Short-Bunched Electrons", Physical Review E, vol. 51, No. 61, pp. R5212-R5215, Jun. 1995.
G. Doucas, J. H. Mulvey, M. Omori, J. Walsh, and M. F. Kimmitt, "First Observation of Smith-Purcell Radiation from Relativistic Electrons", Physical Review Letters, vol. 69, No. 12, pp. 1761-1764, Sep. 21, 1992.
Jr. Leon Scott
The Regents of the University of California
Wilson Ray G.
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