Journal Article

PUBDB-2017-05924

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Statistical properties of a free-electron laser revealed by Hanbury Brown-Twiss interferometry

Gorobtsov, O. Y. ; Mercurio, G.CFEL*Extern*DESY* ; Brenner, G.DESY* ; Lorenz, U.Extern* ; Gerasimova, N.XFEL.EU* ; Kurta, R.XFEL.EU* ; Hieke, F.Extern* ; Skopintsev, P. ; Zaluzhnyy, I. ; Lazarev, S.DESY* ; Dzhigaev, D.DESY* ; Rose, M.DESY* ; Singer, A.Extern* ; Wurth, W.CFEL*Extern*DESY* ; Vartanyants, I. A. (Corresponding author)DESY*

2017
APS Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevA.95.023843  doi:10.3204/PUBDB-2017-05924

Abstract: We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission free-electron laser (FEL) FLASH by means of Hanbury Brown and Twiss interferometry. The experiments were performed at FEL wavelengths of 5.5, 13.4, and 20.8 nm. We determined the second-order intensity correlation function for all wavelengths and different operation conditions of FLASH. In all experiments a high degree of spatial coherence (above 50%) was obtained. Our analysis performed in spatial and spectral domains provided us with the independent measurements of an average pulse duration of the FEL that were below 60 fs. To explain the complicated behavior of the second-order intensity correlation function we developed an advanced theoretical model that includes the presence of multiple beams and external positional jitter of the FEL pulses. By this analysis we determined that in one of the experiments external positional jitter was about 25% of the beam size. We envision that methods developed in our study will be used widely for analysis and diagnostics of FEL radiation.

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Contributing Institute(s):

1. FS-Photon Science (FS-PS)
2. Experimentebetreuung PETRA III (FS-PE)
3. FLASH Photonen-Strahlführungen und Optiken (FS-FLASH-B)
4. European XFEL Projekt Team (Eur.XFEL)
5. FS-FLASH (FS-FLASH)

Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
2. 6G2 - FLASH (POF3-622) (POF3-622)

Experiment(s):

1. FLASH Beamline PG2 (FLASH)

Appears in the scientific report 2017

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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