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| TUIOC01 |
High Energy Electron Cooling for an Electron-ion Collider
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- Y. S. Derbenev
JLAB, Newport News, Virginia
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Realization of high luminoity (up to 1035/cm2.s) polarized beams an Electron-Ion Collider designed for frontiers in Nuclear Physics at Jefferso Laboratory requires use of ERL-based electron beam of about 75 MeV energy range at average current 2-3 A electron beam circulating in a ring during about 100 revolutions. In the presented CW operated beam switching scheme based on use of a low energy pulsed beam-kicker, the average current in ERL does not exceed 30 mA at bunch repetition rate 15 MHz (while 1.5 GHz at 3A in the cooler ring). The cooling scheme is implementing 3 stages (cooling at injection enrgy, cooling after acceleration - takes about 10 min in both cases, and continuous cooling in the collider mode to maintain high luminosity). The synchronization, tolerances, space charge and other issues will be discussed.
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Slides
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| TUCOA01 |
Helical Cooling Channel Developments
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67 |
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- R. P. Johnson, C. Y. Yoshikawa
Muons, Inc, Batavia
- Y. S. Derbenev, V. S. Morozov
JLAB, Newport News, Virginia
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Helical Cooling Channels, based on the same helical dipole Siberian Snake magnets used for spin control in synchrotrons and storage rings, are now proposed for almost all stages of muon beam cooling that are required for high luminosity muon colliders. We review the status of the theory, simulations, and technology development for the capture, phase rotation, 6-D ionization cooling, parametric-resonance ionization cooling, and reverse emittance exchange sections of one of the candidate scenarios for a high-luminosity. high-energy muon collider.
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Slides
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