Measuring short electron bunch lengths using coherent smith-purc

Coherent light generators – Free electron laser

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372 9, H01S 300

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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.

REFERENCES:
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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.

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