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FEL-based coherent electron cooling for high-energy hadron colliders

Description: Cooling intense high-energy hadron beams is a major challenge in modern accelerator physics. Synchrotron radiation is too feeble and two common methods--stochastic and electron cooling--are not efficient in providing significant cooling for high energy, high intensity proton colliders. In this paper they discuss a practical scheme of Coherent Electron Cooling (CeC), which promises short cooling times (below one hour) for intense proton beams in RHIC at 250 GeV or in LHC at 7 TeV. A possibility … more
Date: June 23, 2008
Creator: Litvinenko,V. N. & Derbenev, Y. S.
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Partner: UNT Libraries Government Documents Department
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Helical channel design and technology for cooling of muon beams

Description: Novel magnetic helical channel designs for capture and cooling of bright muon beams are being developed using numerical simulations based on new inventions such as helical solenoid (HS) magnets and hydrogen-pressurized RF (HPRF) cavities. We are close to the factor of a million six-dimensional phase space (6D) reduction needed for muon colliders. Recent experimental and simulation results are presented.
Date: August 1, 2010
Creator: Yonehara, K.; Derbenev, Y. S. & Johnson, R. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of a gas-filled helical muon beam cooling channel

Description: A helical cooling channel (HCC) can quickly reduce the six dimensional phase space of muon beams for muon colliders, neutrino factories, and intense muon sources. The HCC is composed of solenoidal, helical dipole, and helical quadrupole magnetic fields to provide the focusing and dispersion needed for emittance exchange as the beam follows an equilibrium helical orbit through a continuous homogeneous absorber. The beam dynamics of a gas-filled helical muon beam cooling channel is studied by usi… more
Date: June 1, 2006
Creator: Yonehara, K.; Derbenev, Y.; Johnson, R. P. & Roberts, T. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Highly Polarized Ion Sources for Electron Ion Colliders (EIC)

Description: The operation of the RHIC facility at BNL and the Electron Ion Colliders (EIC) under development at Jefferson Laboratory and BNL need high brightness ion beams with the highest polarization. Charge exchange injection into a storage ring or synchrotron and Siberian snakes have the potential to handle the needed polarized beam currents, but first the ion sources must create beams with the highest possible polarization to maximize collider productivity, which is proportional to a high power of the… more
Date: March 1, 2010
Creator: V.G. Dudnikov, R.P. Johnson, Y.S. Derbenev, Y. Zhang
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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VORPAL simulations relevant to coherent electron cooling

Description: Coherent electron cooling (CEC) [1] combines the best features of electron cooling and stochastic cooling, via free-electron laser technology [2], to offer the possibility of cooling high-energy hadron beams with order-of-magnitude shorter cooling times. Many technical difficulties must be resolved via full-scale 3D simulations, before the CEC concept can be validated experimentally. VORPAL is the ideal code for simulating the modulator and kicker regions, where the electron and hadron beams wi… more
Date: June 23, 2008
Creator: Bell, G.; Bruhwiler, D.; Sobol, A.; Ben-Zvi, Ilan; Litvinenko, V. & Derbenev, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An Accumulator/Pre-Booster for the Medium-Energy Electron Ion Collider at Jlab

Description: Future nuclear physics facilities such as the proposed electron ion collider (MEIC) will need to achieve record high luminosities in order to maximize discovery potential. Among the necessary ingredients is the ability to generate, accumulate , accelerate, and store high current ion beams from protons to lead ions. One of the main components of this ion accelerator complex for MEIC chain is the accumulator that also doubles as a pre-booster, which takes 200 MeV protons from a superconducting li… more
Date: April 1, 2011
Creator: Erdelyi, B.; Manikonda, S. L.; Ostroumov, P. N.; Abeyratne, S.; Derbenev, Y. S.; Krafft, G. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Progress on Design Studies of High-Luminosity Ring-Ring Electron-Ion Collider at CEBAF

Description: The conceptual design of a ring-ring electron-ion collider based on CEBAF has been continuously optimized to cover a wide center-of-mass energy region and to achieve high luminosity and polarization to support next generation nuclear science programs. Here, we summarize the recent design improvements and R&D progress on interaction region optics with chromatic aberration compensation, matching and tracking of electron polarization in the Figure-8 ring, beam-beam simulations and ion beam coo… more
Date: May 1, 2009
Creator: Zhang, Y.; Bruell, A.; Chevtsov, P.; Derbenev, Y. S.; Ent, R.; Krafft, G. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Complete Muon Cooling Channel Design and Simulations

Description: Considerable progress has been made in developing promising subsystems for muon beam cooling channels to provide the extraordinary reduction of emittances required for an energy-frontier muon collider. However, it has not yet been demonstrated that the various proposed cooling subsystems can be consolidated into an integrated end-to-end design. Presented here are concepts to address the matching of transverse emittances between subsystems through an extension of the theoretical framework of the… more
Date: May 1, 2012
Creator: Neuffer, D. V.; Ankenbrandt, C. M.; Johnson, R. P.; Yoshikawa, C. Y.; Derbenev, Y. S. & Morozov, V. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ion polarization in the MEIC figure-8 ion collider ring

Description: The nuclear physics program envisaged at the Medium-energy Electron-Ion Collider (MEIC) currently being developed at the Jefferson Lab calls for collisions of 3-11 GeV/c longitudinally polarized electrons and 20-100 GeV/c, in equivalent proton momentum, longitudinally/ transversely polarized protons/ deuterons/ light ions. We present a scheme that provides the required ion polarization arrangement in the MEIC's ion collider ring.
Date: July 1, 2012
Creator: V.S. Morozov, Ya.S. Derbenev, Y. Zhang, P. Chevtsov, A.M. Kondratenko, M.A. Kondratenko, Yu.N. Filatov
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Partner: UNT Libraries Government Documents Department
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Isochronous pion decay channel for enhanced muon capture

Description: Intense muon beams have many potential applications, including neutrino factories and muon colliders. However, muons are produced in tertiary beams into a diffuse phase space. To make useful beams, the muons must be rapidly cooled before they decay. A promising new concept for the collection and cooling of muon beams is being investigated, namely, the use of a nearly Isochronous Helical Transport Channel (IHTC) to facilitate capture of muons into RF bunches. Such a distribution could be cooled … more
Date: June 1, 2008
Creator: Yoshikawa, C.; Ankenbrandt, C.; Neuffer, D.; Popovic, M.; Yonehara, K.; Derbenev, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Progress with FEL-based coherent electron cooling

Description: 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). The possibility of coherent electron cooling, based on high-gain FEL and ERL, was presented at last FEL conference [1]. This scheme promises significant increases in luminosities of modern high-energy h… more
Date: August 24, 2008
Creator: Litvinenko, V.; Ben-Zvi, Ilan; Blaskiewicz, M.; Hao, Y.; Kayran, D.; Pozdeyev, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MEIC Design Progress

Description: No Description Available.
Date: October 7, 2013
Creator: Manikonda, S. L.; Ostroumov, P. N.; Barber, D. P.; Filatov, Y.; Hyde, C.; Sullivan, M. K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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