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| MOPPH026 |
High Gain FEL Amplification of Charge Modulation Caused by a Hadron
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51 |
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- V. Litvinenko, I. Ben-Zvi, Y. Hao, A. Kayran, E. Pozdeyev, G. Wang
BNL, Upton, Long Island, New York
- S. Reiche
UCLA, Los Angeles, California
- O. A. Shevchenko, N. Vinokurov
BINP SB RAS, Novosibirsk
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In scheme of coherent electron cooling*, a modulation of electron beam density induced by a co-propagation hadron is amplified in high gain FEL. The resulting amplified modulation of electron beam, its shape, form and its lethargy determine number of important properties of the coherent electron cooling. In this talk we present both analytical and numerical (using codes RON and Genesis) evaluations of the corresponding Green functions. We also discuss influence of electron beam parameters on the FEL response.
* V. N.Litvinenko, Y. S.Derbenev, Proc. of 29th International FEL Conference, Novosibirsk, Russia, August 27-31, 2007, p.268, http://accelconf.web.cern.ch/accelconf/f07/HTML/AUTHOR. HTM
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| THCAU01 |
Commissioning of Novosibirsk Multi-pass Energy Recovery Linac
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507 |
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- N. Vinokurov, E. N. Dementyev, B. A. Dovzhenko, N. Gavrilov, B. A. Knyazev, E. I. Kolobanov, V. V. Kubarev, G. N. Kulipanov, A. N. Matveenko, L. E. Medvedev, S. V. Miginsky, L. A. Mironenko, V. K. Ovchar, V. M. Popik, T. V. Salikova, M. A. Scheglov, S. S. Serednyakov, O. A. Shevchenko, A. N. Skrinsky, V. G. Tcheskidov, Y. Tokarev, P. Vobly
BINP SB RAS, Novosibirsk
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Novosibirsk energy recovery linac (ERL) facility is planned to use the same RF system and electron gun to run three different FELs. First FEL, installed on the ERL orbit, which lies in the vertical plane is in operation from 2003. It provides average power up to 500 W in the wavelength range 110 – 240 micron and since 2004 works for users. Four orbits in the horizontal plane were added this year. It is planned to have two additional FELs at the second (20 MeV) and fourth (40 MeV) tracks of ERL. The operation mode with one of three FELs may be chosen by switching of some magnets. Recently the two-orbit mode of ERL (for the second FEL operation) was commissioned successfully. The beam passed four times through the accelerating RF cavities and was absorbed in the beam dump. Thus, the first in the world two-orbit ERL is in operation now. Some details of design, status of the facility and plans are discussed.
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| THDAU05 |
Progress with FEL-based Coherent Electron Cooling
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529 |
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- V. Litvinenko, I. Ben-Zvi, M. Blaskiewicz, A. V. Fedotov, Y. Hao, A. Kayran, E. Pozdeyev, D. Trbojevic, G. Wang
BNL, Upton, Long Island, New York
- G. I. Bell, D. L. Bruhwiler, A. V. Sobol
Tech-X, Boulder, Colorado
- Y. S. Derbenev
JLAB, Newport News, Virginia
- S. Reiche
UCLA, Los Angeles, California
- O. A. Shevchenko, N. Vinokurov
BINP SB RAS, Novosibirsk
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Cooling intense high-energy hadron beams remains a major challenge for accelerator physics. Synchrotron radiation is too feeble, while efficiency of two other cooling methods falls rapidly either at high bunch intensities (i.e. stochastic cooling of protons) or at high energies (i.e. e-cooling). Possibility of coherent electron cooling based on high-gain FEL and ERL was presented at last FEL conference*. This scheme promises significant increases in luminosities of modern high-energy hadron and electron-hadron colliders, such as LHC and eRHIC. In this talk we present progress in development of this concept, results of analytical and numerical evaluation of the concept as well our prediction for LHC and RHIC. We also present our plan and design for proof-of-principle experiment at RHIC using existing R&D ERL.
* V. N.Litvinenko, Y. S. Derbenev, Proc. of 29th International FEL Conference, Novosibirsk, Russia, August 27-31, 2007, p.268, http://accelconf.web.cern.ch/accelconf/f07/HTML/AUTHOR. HTM
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Slides
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