Demodulation of a positron beam in a bent crystal channel

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:269

Article

Kostyuk, A.¹  Korol, A. V.^1,2  Solov'yov, A. V.¹  Greiner, Walter¹ 

[1] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany

[2] St Petersburg State Maritime Tech Univ, Dept Phys, St Petersburg, Russia

关键词: Channelling;    Crystalline undulator;    Free electron laser;    Diffusion theory;   

DOI  :  10.1016/j.nimb.2011.04.006

来源: Elsevier

【 摘 要 】

The evolution of a modulated positron beam in a planar crystal channel is investigated within the diffusion approach. A detailed description of the formalism is given. A new parameter, the demodulation length, is introduced, representing the quantitative measure of the depth at which the channelling beam preserves its modulation in the crystal. It is demonstrated that there exist crystal channels with the demodulation length sufficiently large for using the crystalline undulator as a coherent source of hard X-rays. This finding is a crucial milestone in developing a new type of lasers radiating in the hard X- and gamma-ray range. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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