TY - CONF
AU - Park, J.-W.
AU - Kim, K.-J.
AU - Lindberg, R.R.
ED - Schaa, Volker R.W.
ED - Decking, Winfried
ED - Sinn, Harald
ED - Geloni, Gianluca
ED - Schreiber, Siegfried
ED - Marx, Michaela
TI - An Investigation of Possible Non-Standard Photon Statistics in a Free-Electron Laser I: Experiment
J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019
CY - Hamburg, Germany
T2 - Free Electron Laser Conference
T3 - 39
LA - english
AB - It was reported that the photon statistics of the seventh coherent spontaneous harmonic radiation of the MARK III FEL was sub-Poissonian [1], which concludes that Fano factor F (the ratio of photon number variance to the average photon number) is less than unity. Whether FEL light exhibits such non-standard behavior is an important issue; if it does, our understanding of the FEL needs to be radically modified. In this paper, we re-examine the analyses of experimental data in Ref. [1]. We find that the observed value of F could be explained within the standard FEL theory if one combines the detector dead time effect with photon clustering arising from the FEL gain. We propose an improved experiment for a more definitive measurement of the FEL photon statistics.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 161
EP - 164
KW - photon
KW - FEL
KW - experiment
KW - cavity
KW - radiation
DA - 2019/11
PY - 2019
SN - ""
SN - 978-3-95450-210-3
DO - doi:10.18429/JACoW-FEL2019-TUP053
UR - http://jacow.org/fel2019/papers/tup053.pdf
ER -
TY - CONF
AU - Park, J.-W.
AU - Kim, K.-J.
AU - Lindberg, R.R.
ED - Schaa, Volker R.W.
ED - Decking, Winfried
ED - Sinn, Harald
ED - Geloni, Gianluca
ED - Schreiber, Siegfried
ED - Marx, Michaela
TI - An Investigation of Possible Non-Standard Photon Statistics in a Free-Electron Laser II: Theory
J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019
CY - Hamburg, Germany
T2 - Free Electron Laser Conference
T3 - 39
LA - english
AB - In this paper we explore whether we can at present find a theoretical basis for non-standard, sub-Poissonian photon statistics in the coherent spontaneous harmonic radiation of an FEL as was claimed to have been measured with the Mark III FEL [1]. We develop a one dimensional quantum FEL oscillator model of the harmonic radiation in the linear gain regime to calculate the photon statistics. According to our study, it seems unlikely that the photon statistics for an FEL oscillator starting from the noise could be sub-Poissonian.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 165
EP - 167
KW - electron
KW - photon
KW - FEL
KW - radiation
KW - laser
DA - 2019/11
PY - 2019
SN - ""
SN - 978-3-95450-210-3
DO - doi:10.18429/JACoW-FEL2019-TUP054
UR - http://jacow.org/fel2019/papers/tup054.pdf
ER -