Radiation guiding in channeling beam x-ray laser by Bragg reflection coupling

Journal Article · Fri Dec 15 00:00:00 EST 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.7097· OSTI ID:7020209

Strauss, M; Rostoker, N ^[1]

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1. Department of Physics, University of California, Irvine, California 92717 (US)

The effects of radiation guiding on an electron-beam channeling x-ray laser are investigated. An essential feature of this laser is distributed feedback induced by Bragg reflections. Using the Maxwell-Bloch scheme including the transverse Laplacian it is shown that reflection guiding and absorption guiding can avoid the diffraction of the amplified radiation out of the amplification medium for a beam radius in the range of 100--1000 A. This opens the possibility of considering a channeling x-ray laser with high current density (10{sup 5} A/cm{sup 2}), low emittance, but with very small total current (10 {mu}A), similar to the beam used in scanning electron microscopy. On the other hand, gain guiding can avoid radiation diffraction in such small beam systems, but only with a further increase in the requirements on the beam current density. It is noted that planar superlattice crystals with a periodic structure of the order of 100 A transverse to the beam propagation can be useful for radiation guiding.

• OSTI ID: 7020209
• Journal Information: Physical Review (Section) A: General Physics; (USA), Vol. 40:12; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
X-RAY LASERS
FEASIBILITY STUDIES
BEAM EMITTANCE
BRAGG REFLECTION
CRYSTALS
CURRENT DENSITY
DIFFRACTION
ELECTRON CHANNELING
FEEDBACK
GAIN
RELATIVISTIC RANGE
AMPLIFICATION
CHANNELING
COHERENT SCATTERING
ENERGY RANGE
LASERS
REFLECTION
SCATTERING
426002* - Engineering- Lasers & Masers- (1990-)