Simulation Studies on the Saturated Emission at PITZ

Li, Xiangkun; Boonpornprasert, Prach; Chen, Ye; Good, James; Groß, Matthias; Isaev, Igor; Koschitzki, Christian; Krasilnikov, Mikhail; Lal, Shankar; Lishilin, Osip; Loisch, Gregor; Melkumyan, David; Niemczyk, Raffael; Oppelt, Anne; Qian, Houjun; Shaker, Seyd Hamed; Shu, Guan; Stephan, Frank; Vashchenko, Grygorii

doi:10.18429/JACoW-FEL2019-WEP052

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RIS citation export for WEP052: Simulation Studies on the Saturated Emission at PITZ

TY  - CONF
AU  - Li, X.
AU  - Boonpornprasert, P.
AU  - Chen, Y.
AU  - Good, J.D.
AU  - Groß, M.
AU  - Isaev, I.I.
AU  - Koschitzki, C.
AU  - Krasilnikov, M.
AU  - Lal, S.
AU  - Lishilin, O.
AU  - Loisch, G.
AU  - Melkumyan, D.
AU  - Niemczyk, R.
AU  - Oppelt, A.
AU  - Qian, H.J.
AU  - Shaker, H.
AU  - Shu, G.
AU  - Stephan, F.
AU  - Vashchenko, G.
ED  - Schaa, Volker R.W.
ED  - Decking, Winfried
ED  - Sinn, Harald
ED  - Geloni, Gianluca
ED  - Schreiber, Siegfried
ED  - Marx, Michaela
TI  - Simulation Studies on the Saturated Emission at PITZ
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 report our consideration and simulation on the space charge dominated emission in the L-band photocathode RF gun at the Photo Injector Test facility at DESY in Zeuthen (PITZ). It has been found that the emission curve, which relates the extracted and accelerated bunch charge after the gun to the laser energy, doesn’t agree very well with Astra simulations when the emission is nearly or fully saturated. Previous studies with a core-halo model for a better fit of the experimentally measured laser transverse profile as well as with an improved transient emission model have resulted in a better agreement between experimental data and simulation. A 3D FFT space charge solver including mirror charge and binned energy/momentum has been built, which also allows more emission mechanisms to be included in the future. In this paper, the energy spread during emission was preliminarily analyzed. Experimentally measured emission curves were compared with simulation, showing the effect of the inhomogeneity of the laser on the emission and beam parameters.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 444
EP  - 447
KW  - laser
KW  - space-charge
KW  - gun
KW  - simulation
KW  - cathode
DA  - 2019/11
PY  - 2019
SN  - ""
SN  - 978-3-95450-210-3
DO  - doi:10.18429/JACoW-FEL2019-WEP052
UR  - http://jacow.org/fel2019/papers/wep052.pdf
ER  -