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Proceedings Paper

Reflectron design for femtosecond electron guns
Author(s): Peter M. Weber; Scott D. Carpenter; Tamas Lucza
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Paper Abstract

We apply the reflectron principle to design an electron gun capable of delivering femtosecond duration electron pulses. The gun is based on photoemission and uses a high repetition rate femtosecond laser system. We show that even at low laser power electrons are generated in a multiphoton process, generating an electron beam with a significant energy spread. The temporal broadening resulting from this distribution can be partially compensated by a reflective electron mirror. Our reflectron features a gridless mirror that focuses the electron pulses in space and time. Computer simulations highlight the important design parameters and demonstrate that pulse durations of hundreds of femtoseconds are achievable, even in cases of broad kinetic energy distributions. The reflectron is very accommodating toward space charge effects, making it an attractive choice in applications requiring high electron densities.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Proc. SPIE 2521, Time-Resolved Electron and X-Ray Diffraction, (1 September 1995); doi: 10.1117/12.218364
Show Author Affiliations
Peter M. Weber, Brown Univ. (United States)
Scott D. Carpenter, Brown Univ. (United States)
Tamas Lucza, JATE Univ. (Hungary)

Published in SPIE Proceedings Vol. 2521:
Time-Resolved Electron and X-Ray Diffraction
Peter M. Rentzepis, Editor(s)

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