Spesyvtsev, R.

Paper	Title	Page
TUPPH037	A Transverse Slice Emittance Measurement System Using Quadrupole Scan Technique and Streak Readout at PITZ	326
	R. Spesyvtsev, J. W. Baehr, M. Krasilnikov, J. Roensch DESY Zeuthen, Zeuthen
	The Photo Injector Test facility at DESY, Zeuthen site, (PITZ) has been built to develop and optimize electron beam sources that fulfill the requirements of the European XFEL photo injector. The European XFEL requires a transverse emittance of less than 1~mm~mrad at the photo injector exit. Although the head and tail of the electron bunch contribute to the projected emittance, it is likely that they have very little influence on the self-amplified spontaneous emission (SASE) process in a FEL. Thus it is important to optimize the emittance of the central slices of the bunch. For this purpose, a setup for transverse slice emittance measurements using a quadrupole scan technique with streak camera readout is being developed at PITZ. In this paper, the measurement procedure is discussed including error estimation and current system limitations. Beam dynamics simulations are presented together with simulations of slice emittance measurements.
TUPPH038	First Measurement Results from the Upgraded Low Energy Longgitudinal Phase Space Diagnostics at PITZ	330
	J. Roensch, J. Rossbach Uni HH, Hamburg G. Asova, J. W. Baehr, C. H. Boulware, H.-J. Grabosch, L. Hakobyan, M. Hänel, Ye. Ivanisenko, M. K. Khojoyan, M. Krasilnikov, B. Petrosyan, S. Rimjaem, T. A. Scholz, A. Shapovalov, R. Spesyvtsev, F. Stephan DESY Zeuthen, Zeuthen S. Lederer, D. Lipka DESY, Hamburg R. Richter BESSY GmbH, Berlin K. Rosbach Humboldt University Berlin, Institut für Physik, Berlin
	The Photo Injector Test facility at DESY, Zeuthen site (PITZ) was built to optimize electron sources and to study electron beam characteristics for short wavelength Free-Electron Lasers (FELs). In addition, using a further accelerating ('booster') RF cavity, the so-called emittance compensation mechanism is under investigation at PITZ. Due to the upgrade of the PITZ facility the gap width of the dipole spectrometer downstream the RF gun cavity was too small and had to be modified. A slit was added in front of the spectrometer to improve the momentum resolution. Design considerations are discussed and first measurement results are presented. Furthermore, the bunch length measurements downstream the gun has been adapted to higher energies.
THAAU05	Latest Results at the Upgraded PITZ Facility	481
	C. H. Boulware, G. Asova, J. W. Baehr, H.-J. Grabosch, L. Hakobyan, M. Hänel, Ye. Ivanisenko, S. Khodyachykh, M. K. Khojoyan, S. A. Korepanov, M. Krasilnikov, B. Petrosyan, S. Rimjaem, T. A. Scholz, A. Shapovalov, R. Spesyvtsev, L. Staykov, F. Stephan DESY Zeuthen, Zeuthen W. Ackermann, E. Arevalo TEMF, TU Darmstadt, Darmstadt K. Floettmann, S. Lederer, D. Reschke DESY, Hamburg T. Garvey PSI, Villigen G. Klemz, I. Will MBI, Berlin P. M. Michelato, L. Monaco, C. Pagani, D. Sertore INFN/LASA, Segrate (MI) R. Richter BESSY GmbH, Berlin J. Roensch Uni HH, Hamburg K. Rosbach Humboldt University Berlin, Institut für Physik, Berlin
	The Photo Injector Test facility at DESY, Zeuthen site, (PITZ) develops and optimizes electron sources for high-power, short-wavelength FELs such as FLASH and the European XFEL. PITZ has now restarted operation after a very significant upgrade. A new laser system has been installed which, when fully commissioned, is expected to deliver 20 ps-long pulses with rise and fall times of 2 ps. Also, a new 1.5-cell L-band gun with improved cooling channel design has been installed. A new dry-ice cleaning method was employed during this gun’s preparation, and conditioning results from this gun show significantly decreased dark current compared with the summer 2007 run. We describe the new stage of the facility, report the complete conditioning results from the new electron gun, give an overview of the experimental results from the 2008 run period, and present a description of the additional planned upgrades toward the full operating design of the facility.
	Slides