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Proceedings Paper

Parametric beam instability of the electron bunch in a crystal
Author(s): Aleksandr Leonov; Andrei Benediktovitch; Dmitriy Ksenzov; Ilya Feranchuk; Ullrich Pietsch
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Paper Abstract

Effect of the parametric beam instability (PBI) of the relativistic electron beam in a crystal was analyzed theoretically in1 (see also2). This effect is analogous to self-amplification of spontaneous emission (SASE) mechanism for X-ray Free Electron Laser (XFEL) with an undulator. However, in the case of PBI the transversal modulation of the beam is defined by channeling of the electron in a crystal and the longitudinal modulation arises because of the parametric X-ray radiation mechanism. It is shown in the present paper that the current density J in the electron bunch typical for FEL facility is enough for the beam self-modulation within the X-ray range if the crystal thickness is larger than the crystal absorption length L ≥ Labs. This process could be used for generation of the coherent X-ray pulses if the time τd of the crystal destruction affected by the electron bunch is less than its passing time τd < L=c. The value τd (J) is estimated for the case of the FLASH electron bunch propagating through a Si crystal.

Paper Details

Date Published: 3 May 2013
PDF: 7 pages
Proc. SPIE 8778, Advances in X-ray Free-Electron Lasers II: Instrumentation, 877816 (3 May 2013); doi: 10.1117/12.2021262
Show Author Affiliations
Aleksandr Leonov, Belarusian State Univ. (Belarus)
Andrei Benediktovitch, Belarusian State Univ. (Belarus)
Dmitriy Ksenzov, Univ. Siegen (Germany)
Ilya Feranchuk, Belarusian State Univ. (Belarus)
Ullrich Pietsch, Univ. Siegen (Germany)

Published in SPIE Proceedings Vol. 8778:
Advances in X-ray Free-Electron Lasers II: Instrumentation
Thomas Tschentscher; Kai Tiedtke, Editor(s)

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