Coherent radiation recoil effect for the optical diffraction radiation beam size monitor at SLAC FFTB
| Parent link: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Vol. 227, iss. 1-2.— 2005.— [P. 170-174] |
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| Other Authors: | , , , , , , , , , , , , |
| Summary: | Title screen A short electron bunch with length σ passing through a slit in the diffraction radiation (DR) target generates radiation with a broad spectrum. Optical part of the spectrum (incoherent radiation) may be used for beam size measurements, but in the wavelength range λ ⩾ σ radiation becomes coherent. The coherent DR spectrum per each electron in a bunch is equal to single electron spectrum times by the number of electrons in a bunch Ne and bunch form factor. For SLAC FFTB conditions (Ne ∼ 1010, σ = 0.7 mm, outer target size R ∼ 10 mm, slit width h ∼ 0.1 mm) we approximated coherent DR (CDR) spectrum by coherent transition radiation (TR) one because in the wavelength region λ ∼ σ ≫ h TR and DR spectra coincide with high accuracy. Changing the DR target by a TR target with projection on the plane perpendicular to electron beam as a circle with radius R ⩽ 20 mm we calculated CDR spectra using simple model.Knowing the CDR spectrum we estimated the energy CDR emitting by each electron in the perpendicular direction (due to target inclination angle 45°). It means an electron receives the radiation recoil in this direction. In other words, electron has a transverse kick about 1 μrad that may be considered as permissible Режим доступа: по договору с организацией-держателем ресурса |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0168583X04008225 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=636349 |