1 / 16

Toward a Test Facility for an ERL Circulator Ring Based e-Cooler

Toward a Test Facility for an ERL Circulator Ring Based e-Cooler. MEIC Electron Cooler Test Facility Planning Retreat January 31, 2012. Charge of the Retreat. Examine the feasibility of utilizing JLab FEL Facility for a test bad of ERL-Circulator-Ring e-cooler

kelda
Télécharger la présentation

Toward a Test Facility for an ERL Circulator Ring Based e-Cooler

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Toward a Test Facility for an ERL Circulator Ring Based e-Cooler MEIC Electron Cooler Test Facility Planning Retreat January 31, 2012

  2. Charge of the Retreat • Examine the feasibility of utilizing JLab FEL Facility for a test bad of ERL-Circulator-Ring e-cooler • Determine the goals of this test facility • Formulate plausible test scenarios • Determine the required pre-R&D • Draft a plan for this test facility

  3. What We Want to Test/Demonstrate/Study? • Production of high current/bunch intensity, high repetition beam • Energy recovery of a high current electron beam after its extended stay in a circulator ring; • Operation of a circulator ring including injection and ejection of the beam bunches, and advanced filling schemes; • Quality of the beam bunch during a large number of circulations in a ring • Collective beam effects (space charge, CSR)

  4. e-Cooler Test Facility Cooling channel solenoid lattice Diagnostic element Fast kicker Fast kicker

  5. Scaling Down Parameters: How Much? For a convincing demonstration • Beam current in circulator ring: 1.5 A  15 mA ? • Charge per bunch: 2 nC  0.4 nC ? • ERL beam current: 15 mA  15 mA ? • Fast kicker: 1.33 ns (750 MHz)  20 ns (50 MHz) ? • Turns of circulation: 10 to 30 turns ?

  6. Beam Parameters

  7. Test Scenarios • Test high bunch charge injector (DC gun? SRF gun?) • Test high current ERL without/with circulator ring? • Test kicker/filling scheme of a circulator ring? • Test beam stability/collective effects in circulator ring?

  8. Additional Hardware & pre-R&D • Magnetic lattice for the circulator ring • Fast kickers • Beam diagnostic instruments • High bunch intensity electron source • ERL for high bunch intensity beam (?) • (not very fast) kicker • Design and simulation

  9. Timeline • Total time: 2 years (?) • Design/simulation/pre-R&D: 1.5 year • commissioning: 2 months • Running experiments: 4 months

  10. High Brightness SRF Photo Injector Gun

  11. A Polarized Ring-Ring MEIC at JLab Pre-booster (up to 3 GeV) Ionsource Large booster to collider ring transfer beamline Large booster (warm) (up to 20 GeV/c) SRF linac Ion collider ring (cold) • (up to 100 GeV/c) Three Figure-8 rings stacked vertically Medium energy IP with horizontal crab crossing Electron ring (3 to 11 GeV) Injector 12 GeV CEBAF Future energy/luminosity upgrade possible (250 GeV proton, 100 GeV/u ion, 1035 cm-2s-1)

  12. Optimized Location of Cooling Channel 20 m Solenoid (15 m) injector SRF Short circulating beam-line Center of Figure-8 dumper • Eliminating a long circulating beam-line could • cut cooling time by half, or • reduce the cooling electron current by half, or • reduce the number of circulating by half

  13. Cooling in Ion Collider Ring • Initial cooling after ions injected into the collider ring for reduction of longitudinal emittance before acceleration • After boost & re-bunching, cooling for reaching design values of beam parameters • Continuous cooling during collision for suppressing IBS, maintaining luminosity lifetime BetaCool Simulations In collision mode of MEIC, 60 GeV proton emittance IBS growth time

  14. Monitoring Bunch Evolution in Circulator Ring Cooling channel solenoid lattice Kicking bunches out after n-th turn Fast kicker Fast kicker Diagnostic element Diagnostic element

More Related