FROBI1
JLAB, Newport News, Virginia, USA
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FROBI1 |
Electron Beam Diagnostics For High Current FEL Drivers | |
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| The application of high current SRF CW accelerators to drive FELs provides dramatic increase in the average photon beam brightness compared to FELs driven by pulsed NC accelerators. At the same time, use of energy recovery allows significant reductions in the required RF power. The JLab IR-Demo and IR-Upgrade demonstrated it in the IR wavelength range. Currently the options to extend this approach to soft X-ray region are under consideration [1]. As high current ERLs give the advantages of running high current and maintaining the linac beam quality they also present the challenges of measuring and understanding the beam dynamics of non-equilibrium beams combined with the requirement to keep average beam losses below the 10-7 level. Operation of the IR-Upgrade provides demonstration of these challenges. In this talk we share our experience with the machine operation and beam measurements and present our outlook at the possible strategies for beam measurements and tuning in such machines. We argue that the solution to this problem might be to have diagnostics and machine models to measure and understand the phase space distribution with dynamic range of 106 or larger. | ||
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Slides FROBI1 [11.279 MB] | |