Paper |
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MOOP08 |
Latest News on High Average RF Power Operation at PITZ |
59 |
MOPRC002 |
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- Y. Renier, G. Asova, P. Boonpornprasert, J.D. Good, M. Groß, H. Huck, I.I. Isaev, D.K. Kalantaryan, M. Krasilnikov, O. Lishilin, G. Loisch, D. Melkumyan, A. Oppelt, T. Rublack, F. Stephan
DESY Zeuthen, Zeuthen, Germany
- G. Asova
INRNE, Sofia, Bulgaria
- M. Bousonville, S. Choroba, S. Lederer
DESY, Hamburg, Germany
- C. Saisa-ard
Chiang Mai University, Chiang Mai, Thailand
- Q.T. Zhao
IMP/CAS, Lanzhou, People's Republic of China
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The Photo Injector Test Facility at DESY in Zeuthen (PITZ) develops, tests and characterizes high brightness electron sources for FLASH and European XFEL. Since these FELs work with superconducting accelerators in pulsed mode, also the corresponding normal-conducting RF gun has to operate with long RF pulses. Generating high beam quality from the photocathode RF gun in addition requires a high accelerating gradient at the cathode. Therefore, the RF gun has to ensure stable and reliable operation at high average RF power, e.g. 6.5 MW peak power in the gun for 650 μs RF pulse length at 10 Hz repetition rate for the European XFEL. Several RF gun setups have been operated towards these goals over the last years. The latest gun setup was brought into the PITZ tunnel on February 10th 2016 and its RF operation started on March 7th. This setup includes RF gun prototype 4.6 with a new cathode contact spring design and an RF input distribution which consists of an in-vacuum coaxial coupler, an in-vacuum T-combiner and 2 RF windows from DESY production. In this contribution we will summarize the experience from the RF conditioning of this setup towards high average RF power and first experience from the operation with photoelectrons.
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Slides MOOP08 [0.563 MB]
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Poster MOOP08 [0.367 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-MOOP08
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MOPLR013 |
Investigations on Electron Beam Imperfections at PITZ |
165 |
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- M. Krasilnikov, P. Boonpornprasert, J.D. Good, M. Groß, H. Huck, I.I. Isaev, D.K. Kalantaryan, O. Lishilin, G. Loisch, D. Melkumyan, A. Oppelt, G. Pathak, Y. Renier, T. Rublack, F. Stephan, G. Vashchenko, Q.T. Zhao
DESY Zeuthen, Zeuthen, Germany
- G. Asova
INRNE, Sofia, Bulgaria
- C. Hernandez-Garcia
JLab, Newport News, Virginia, USA
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Since more than a decade, the photo injector test facility at DESY, Zeuthen site (PITZ), has developed and optimized high brightness electron sources for modern Free Electros Lasers like FLASH and the European XFEL. Despite a very high performance of the photo injector was experimentally demonstrated, several discrepancies between measurements and beam dynamics simulations have been revealed. Although the optimized measured values of the projected transverse emittance are close to those obtained from the beam dynamics simulations, the corresponding experimental machine parameters show certain systematic deviations from the simulated optimized setup. As a source for these deviations, electron beam imperfections were experimentally investigated. This includes studies on bunch charge production, electron beam imaging using the RF gun with its solenoid, and investigations on the transverse asymmetry of the electron beam generated in a rotationally symmetric gun cavity. Experimental studies were supplied with corresponding beam dynamics simulations. The paper reports on results of these studies.
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Poster MOPLR013 [2.140 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR013
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Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
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