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A Single Shot, Sub-picosecond Beam Bunch Characterization with Electro-optic Techniques

Y. K. Semertzidis, R. Burns, V. Castillo, R. Larsen, D. M. Lazarus, D. Nikas, C. Ozben, T. Srinivasan-Rao, A. Stillman, T. Tsang, L. Kowalski

physics.acc-pharXiv:physics/0110052

Abstract

In the past decade, the bunch lengths of electrons in accelerators have decreased dramatically to the range of a few picoseconds Uesaka94,Trotz97. Measurement of the length as well as the longitudinal profile of these short bunches have been a topic of research in a number of institutions Uesaka97,Liu97,Hutchins00. One of the techniques uses the electric field induced by the passage of electrons in the vicinity of a birefringent crystal to change its optical characteristics. Well-established electro-optic techniques can then be used to measure the temporal characteristics of the electron bunch. In this paper we present a novel, non-invasive, single-shot approach to improve the resolution to tens of femtoseconds so that sub-millimeter bunch length can be measured.

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