Abstract
We present detailed simulations and analysis of Zholents’s [A. Zholents, P. Heimann, M. Zolotorev, and J. Byrd, Nucl. Instrum. Methods Phys. Res., Sect. A 425, 385 (1999).] concept for using deflecting cavities in a synchrotron light source storage ring for the purpose of producing short x-ray pulses. In particular, we look at the optimization and performance of such a system for the Advanced Photon Source. We find the concept is practical and that x-ray pulse durations of about 1.5 ps FWHM should be achievable with more than 15% of the original intensity retained. Issues covered include lattice design, emittance degradation, lifetime, photon beam modeling, errors, and optimum choice of rf parameters.
Highlights
This paper presents detailed simulation studies and analyses of x-ray compression using transverse-deflecting rf cavities [1] in the Advanced Photon Source (APS), a 7GeV synchrotron radiation source
Efforts to produce short x-ray pulses in storage rings are fraught with difficulty
We have investigated the feasibility from an accelerator physics standpoint of using transverse-deflecting cavities in the APS in order to allow production of short x-ray pulses
Summary
This paper presents detailed simulation studies and analyses of x-ray compression using transverse-deflecting rf cavities [1] in the Advanced Photon Source (APS), a 7GeV synchrotron radiation source. In the APS, the beam is naturally long (about 20 ps rms) because of the relatively large energy spread (about 0.096% rms) and the limited rf voltage possible with continuous-duty systems. The desire for long Touscheck lifetimes motivates against making the electron bunch too short. Use of an isochronous lattice gives short bunches, but at greatly reduced intensity [3]. An analytical treatment of x-ray compression is given, which provides an indication of how much deflecting voltage will be required. Limitations on the deflecting voltage and frequency related to beam lifetime requirements are covered next. We describe how to model the photon beam and its compres1098-4402=05=8(7)=074001(18)
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