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Title Studies of CSR and Microbunching at the Jefferson Laboratory ERLs
  • C. Tennant, S.V. Benson, D. Douglas, R. Li
    JLab, Newport News, Virginia, USA
  • C.-Y. Tsai
    SLAC, Menlo Park, California, USA
Abstract One attractive feature of energy recovery linacs (ERLs) is they are source limited. However as beam brightness increases so too do the effects of coherent synchrotron radiation (CSR) and the microbunching instability. The Low Energy Recirculator Facility at Jefferson Laboratory provides a test bed to characterize aspects of CSR's effect on the beam by measuring the energy extraction via CSR as a function of bunch compression. Data was recorded with acceleration occuring on the rising part of the RF waveform while the full compression point was moved along the backleg of the machine and the response of the beam measured. Acceleration was moved to the falling part of the RF waveform and the experiment repeated. Initial start-to-end simulations using a 1D CSR model show good agreement with measurements. The experiment motivated the design of a modified Continuous Electron Beam Accelerator Facility style arc with control of CSR and the microbunching gain. Insights gained from that study informed designs for recirculation arcs in an ERL-driven electron cooler for Jefferson Laboratory's Electron Ion Collider. Progress on the design and outstanding challenges of the cooler are discussed.
Funding Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
Paper download WEIBCC004.PDF [0.990 MB / 6 pages]
Slides download WEIBCC004_TALK.PDF [14.423 MB]
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Conference ERL2017, Geneva, Switzerland
Series ICFA Advanced Beam Dynamics Workshop (59th)
Proceedings Link to full ERL2017 Proccedings
Session WG2.1 ERL Beam Dynamcs
Date 21-Jun-17   10:25–12:05
Main Classification WG2: Optics, Beam Dynamics & Instrumentation
Keywords bunching, emittance, electron, linac, simulation
Publisher JACoW Publishing, Geneva, Switzerland
Editors Suitbert Ramberger (CERN, Geneva, Switzerland); Mick Draper (CERN, Geneva, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN 978-3-95450-190-8
Published May 2018
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