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  Transient-gain photoionization x-ray laser

Weninger, C., & Rohringer, N. (2014). Transient-gain photoionization x-ray laser. Physical Review A, 90(6): 063828. doi:10.1103/PhysRevA.90.063828.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-E290-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-E291-3
Genre: Journal Article

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PhysRevA.90.063828.pdf (Publisher version), 3MB
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http://dx.doi.org/10.1103/PhysRevA.90.063828 (Publisher version)
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 Creators:
Weninger, Clemens1, 2, 3, Author              
Rohringer, Nina1, 2, Author              
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2Center for Free Electron Laser Science, 22607 Hamburg, Germany, ou_persistent22              
3International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              

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Free keywords: PACS numbers: 42.55.Vc, 32.30.Rj, 42.65.Dr, 78.70.Ck
 Abstract: We present a generalized theory based on one-dimensional Maxwell-Bloch equations to study the amplification process of an inner-shell photoionization-pumped atomic x-ray laser. Focusing an x-ray free-electron laser beam in an elongated neon-gas target results in a strong exponential amplification of Kα fluorescence, as recently demonstrated [N. Rohringer et al., Nature (London) 481, 488 (2012); C. Weninger et al., Phys. Rev. Lett. 111, 233902 (2013)]. Here, we present an in-depth theoretical study of the amplification process that goes beyond the previous theory based on a rate-equation approach. We study the evolution of the pulse characteristics during the amplification process for transform-limited Gaussian and broadband self-amplified spontaneous-emission pump pulses. We discuss the impact of the gain-dependent group velocity on the emitted x-ray radiation and the resulting gain-guiding effects. A thorough analysis of the spectral and temporal properties of the emitted radiation is presented, including higher-order field-correlation functions, to characterize the ensemble of emitted x-ray pulses.

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Language(s): eng - English
 Dates: 2014-10-142014-12-222014-12
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevA.90.063828
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Title: Physical Review A
Source Genre: Journal
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Pages: - Volume / Issue: 90 (6) Sequence Number: 063828 Start / End Page: - Identifier: ISSN: 1050-2947