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Generation of Coherent Broadband Photon Pulses with a Cascaded Longitudinal Space-Charge Amplifier
Author(s) -
Agostino Marinelli,
E. Hemsing,
M. Dunning,
Dao Xiang,
Stephen Weathersby,
Finn H. O’Shea,
I. Gadjev,
C. Hast,
J. B. Rosenzweig
Publication year - 2013
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.110.264802
Subject(s) - physics , undulator , optics , amplifier , radiation , laser , space charge , longitudinal mode , electron , amplified spontaneous emission , photon , atomic physics , optoelectronics , cmos , quantum mechanics
The longitudinal space-charge amplifier has been recently proposed by Schneidmiller and Yurkov as an alternative to the free-electron laser instability for the generation of intense broadband radiation pulses [Phys. Rev. ST Accel. Beams 13, 110701 (2010)]. In this Letter, we report on the experimental demonstration of a cascaded longitudinal space-charge amplifier at optical wavelengths. Although seeded by electron beam shot noise, the strong compression of the electron beam along the three amplification stages leads to emission of coherent undulator radiation pulses exhibiting a single spectral spike and a single transverse mode. The on-axis gain is estimated to exceed 4 orders of magnitude with respect to spontaneous emission.

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