CERN Accelerating science

Article
Title	High Power RF Conditioning and Measurement of Longitudinal Emittance at PITZ
Author(s)	Bähr, Jürgen ; Grabosch, Hans Jürgen ; HuiHan, Jang ; Krasilnikov, Mikhail ; Lipka, Dirk ; Miltchev, Velizar ; Oppelt, Anne ; Petrosyan, Bagrat ; Pose, Dietrich ; Riemann, S ; Staykov, Lazar ; Stephan, Frank
Affiliation	(DESY Zeuthen, Zeuthen BESSY GmbH, BerlinDESY Zeuthen, Zeuthen; INRNE, SofiaDESY Zeuthen, Zeuthen; YerPhI, YerevanDESY, HamburgINFN/LASA, Segrate (MI))
Publication	2004
In:	26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. TUPOS03
Subject category	Accelerators and Storage Rings
Abstract	In 2003 the PITZ RF-gun at DESY Zeuthen has been fully characterized. After RF conditioning 3.2MW input power at 10Hz and a RF-pulse length of 0.9ms has been reached. This correponds to a gradient of 42MV/m at the cathode. The goal is to increase the accelerating gradient of the gun and the duty cycle significantly. The motivation is based on the expectation of a remarkable increase in beam quality at higher gradients. A high duty cycle is of advantage for FEL users. The conditioning procedure was started in spring 2004. The paper will report about procedure and results of this program. The preparation of an experimental setup for the measurement of the complete longitudinal phase space at about 5 MeV using a streak camera will be finished in summer 2004. Cherenkov light created by Silica aerogel radiators in the dispersive arm of PITZ is transmitted to a streak camera by an optical transmission line. The light distribution of the momentum spectrum is projected onto the entrance slit of the streak camera. The setup and first results will be presented.