Speaker
Mr
Georgi Georgiev
(DESY Zeuthen)
Description
There are ongoing beam coupling studies at the Photo Injector Test facility at DESY in Zeuthen (PITZ). Electron beam asymetries have been observed and gun quadrupoles are installed to correct them. A 4-dimensional phase space characterization is required to understand the asymmetries in detail. A novel technique for 4-dimensional transverse beam phase space measurement is developed at PITZ. This method is called Virtual Pepper-Pot (VPP), because key principles of the pepper-pot mask method are applied. The 4D transverse phase space is reconstructed from a pepper-pot like pattern that is generated by crossing each measured horizontal slit beamlet with all measured vertical slit beamlets. All elements of the 4D transverse beam matrix are calculated and applied to obtain the 4D transverse emittance, 4D kinematic beam invariant and coupling factors. Results of the technique for bunches of 0.5 nC charge are presented.
Primary author
Mr
Georgi Georgiev
(DESY Zeuthen)
Co-author
Mikhail Krasilnikov
(DESY Zeuthen)
