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| PLT11 |
CW Superconducting RF for Future Linac-Based Light Sources
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- J. Knobloch
BESSY GmbH, Berlin
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Superconducting RF has become a mature technology and has found many applications in both storage-rings and linacs, primarily in the particle and nuclear physics domain. In the last few years, an increasing number of new CW linac-based light sources have been proposed, which operate in the ERL and/or FEL mode. These include proposals such as the 4GLS, the Cornell ERL, the BESSY FEL and the KEK-ERL. Many such machines are based on TESLA technology to be used in the pulsed XFEL at DESY. Modified CEBAF technology is also being applied to machines such as the JLAB FEL. However, there are numerous issues that must be addressed to efficiently operate this technology CW and with high beam currents. An overview of a number of these issues is provided, with a more detailed discussion of a subset to illustrate the challenges that lie ahead.
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| WG223 |
Limits on the Bandwidth for SRF Cavities for ERL linacs
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- J. Knobloch
BESSY GmbH, Berlin
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The effective beam loading in energy recovery linacs is very close to zero. Theoretically, therefore, the optimal input loading of the cavities should be small for reflectionless operation, resulting in bandwidths on the order of 1 Hz or less. In practice, though, such operation is not possible because of issues such as microphonic detuning, rf-field stability and variations in beam loading. An overview of these issues and the state-of-the-art is presented, and the resulting constraints on the bandwidth will be discussed.
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Slides
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