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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Electro-optic time profile monitors for femtosecond electron bunches at the soft x-ray free-electron laser FLASH
AU - Steffen, B.
AU - Arsov, V.
AU - Berden, G.
AU - Gillespie, W.A.
AU - Jamison, S.P.
AU - MacLeod, A.M.
AU - Van Der Meer, A.F.G.
AU - Phillips, P.J.
AU - Schlarb, H.
AU - Schmidt, B.
AU - Schmüser, P.
PY - 2009/3/17
Y1 - 2009/3/17
N2 - Precise measurements of the temporal profile of ultrashort electron bunches are of high interest for the optimization and operation of ultraviolet and x-ray free-electron lasers. The electro-optic (EO) technique has been applied for a single-shot direct visualization of the time profile of individual electron bunches at FLASH. This paper presents a thorough description of the experimental setup and the results. An absolute calibration of the EO technique has been performed utilizing simultaneous measurements with a transverse-deflecting radio-frequency structure that transforms the longitudinal bunch charge distribution into a transverse streak. EO signals as short as 60 fs (rms) have been observed using a gallium-phosphide (GaP) crystal, which is a new record in the EO detection of single electron bunches and close to the physical limit imposed by the EO material properties. The data are in quantitative agreement with a numerical simulation of the EO detection process.
AB - Precise measurements of the temporal profile of ultrashort electron bunches are of high interest for the optimization and operation of ultraviolet and x-ray free-electron lasers. The electro-optic (EO) technique has been applied for a single-shot direct visualization of the time profile of individual electron bunches at FLASH. This paper presents a thorough description of the experimental setup and the results. An absolute calibration of the EO technique has been performed utilizing simultaneous measurements with a transverse-deflecting radio-frequency structure that transforms the longitudinal bunch charge distribution into a transverse streak. EO signals as short as 60 fs (rms) have been observed using a gallium-phosphide (GaP) crystal, which is a new record in the EO detection of single electron bunches and close to the physical limit imposed by the EO material properties. The data are in quantitative agreement with a numerical simulation of the EO detection process.
U2 - 10.1103/PhysRevSTAB.12.032802
DO - 10.1103/PhysRevSTAB.12.032802
M3 - Journal article
VL - 12
JO - Physical Review Special Topics: Accelerators and Beams
JF - Physical Review Special Topics: Accelerators and Beams
SN - 1098-4402
IS - 3
M1 - 032802
ER -