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| TUOBAB01 |
Beam Dynamics of the 250 MeV Injector Test Facility
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785 |
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- A. Adelmann
- R. J. Bakker, C. Kraus, K. L. Li, B. S.C. Oswald, M. Pedrozzi, J.-Y. Raguin, T. Schietinger, F. Stulle, A. F. Wrulich
PSI, Villigen
- J. Qiang
LBNL, Berkeley, California
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The PSI-FEL/LEG project aims for the development of a pulsed high-brightness, high-current electron source which is one of the cornerstones for a cost-efficient high-power laser-like X-ray light-source. Creating an ultra low emittance beam is a great challenge, transporting i.e. accelerating and compressing is equally difficult. We present a 3D start-to-end simulation of our planned 250 MeV injector test facility. The injector consists of a 2 cell standing wave l-band cavity followed by a ballistic bunching section. The following L-band and S-band structures accelerate the electron beam up to the final energy of 250 MeV. An X-band RF structure prepares the beam for the following bunch compressor in which the target current of 350 ampere is reached. The target value of the slice emittance is 0.10 [mm mrad] therefore precise beam dynamics simulations are needed. For the 3D simulations we use IMPACT-T, a time domain parallel particle tracking code in which the self fields are treated using electrostatic approximation . We discuss various issues such as projected and slice emittance preservation and shade light on some of the differences between an envelope and the 3D model.
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Slides
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| TUOBAB02 |
Experimental Characterization of the Transverse Phase Space of a 60-MeV Electron Beam through a Compressor Chicane
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788 |
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- F. Zhou
- R. B. Agustsson, G. Andonian, D. B. Cline, A. Y. Murokh, J. B. Rosenzweig
UCLA, Los Angeles, California
- A. C. Kabel
SLAC, Menlo Park, California
- V. Yakimenko
BNL, Upton, Long Island, New York
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Funding: U. S. DOE of Sciences
Space charge and coherent synchrotron radiation may deteriorate electron beam quality when the beam passes through a magnetic bunch compressor. This paper presents the transverse phase-space tomographic measurements for a compressed beam at 60 MeV, around which energy the first stage of magnetic bunch compression takes place in most advanced linacs. Transverse phase-space bifurcation of a compressed beam is observed at that energy, but the degree of the space charge-induced bifurcation is appreciably lower than the one observed at 12 MeV. The Trafic4 simulation confirms the observation.
The paper was published at PRST-AB, November 2006
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Slides
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