PAC 2005 - List of Authors

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Ivanyushenkov, Y.

Paper	Title	Page
MPPT058	Progress on the Focus Coils for the MICE Channel	3417
	M.A. Green LBNL, Berkeley, California Y. Ivanyushenkov CCLRC/RAL, Chilton, Didcot, Oxon W. Lau, R. Senanayake, S.Q. Yang OXFORDphysics, Oxford, Oxon
	Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC03-76SF00098. This report describes the progress on the magnet part of the absorber focus coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in the level 2 study of a neutrino factory. The MICE absorber focus coil module consists of a pair of superconducting solenoids, mounted on an aluminum mandrel. The coil package that is in its own vacuum vessel surrounds an absorber, which does the ionization cooling of the muons. Either a liquid or solid absorber is within a separate vacuum vessel that is within the warm bore of the superconducting magnet. The superconducting focus coils may either be run in the solenoid mode (with the two coils at the same polarity) or in the flip mode (with the coil at opposite polarity causing the field direction to flip within the magnet bore). The superconducting coils will be cooled using a pair of small 4 K coolers. This report discusses the progress on the MICE focusing magnets, the magnet cooling system and the magnet current supply system.
MPPT059	Progress on the Coupling Coil for the MICE Channel	3468
	M.A. Green, D. Li, S.P. Virostek, M.S. Zisman LBNL, Berkeley, California Y. Ivanyushenkov CCLRC/RAL, Chilton, Didcot, Oxon W. Lau, A. E. White, H. Witte, S.Q. Yang OXFORDphysics, Oxford, Oxon
	Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC03-76SF00098. This report describes the progress on the coupling coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in the level 2 study of a neutrino factory. The MICE RF coupling coil module consists of a superconducting solenoid, mounted around four cells of conventional 201.25 MHz closed RF cavities. This report discusses the progress that has been made on the superconducting coupling coil that is around the center of the RF coupling module. This report also describes the process one would use to cool the coupling coil using a single small 4 K cooler. The coupling magnet power system and quench protections system is also described.
TPPP018	Progress on the MICE Liquid Absorber Cooling and Cryogenic Distribution System	1601
	M.A. Green LBNL, Berkeley, California E. Baynham, T.W. Bradshaw, P. Drumm, Y. Ivanyushenkov CCLRC/RAL, Chilton, Didcot, Oxon M.A.C. Cummings Northern Illinois University, DeKalb, Illinois S. Ishimoto KEK, Ibaraki W. Lau, S.Q. Yang OXFORDphysics, Oxford, Oxon
	Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC03-76SF00098. This report describes the progress made on the design of the liquid hydrogen absorber for the international Muon Ionization Cooling Experiment (MICE). The absorber consists of a 21-liter vessel that contains liquid hydrogen (1.5 kg) or liquid helium (2.63 kg). The cryogen vessel is within the warm bore of the superconducting focusing magnet for the MICE. The purpose of the magnet is to provide a low beam beta region within the absorber. For safety reasons, the vacuum vessel for the hydrogen absorber is separated from the vacuum vessel for the superconducting magnet and the vacuum that surrounds the RF cavities or the detector. The absorber has two 300 mm-diameter thin aluminum windows. The vacuum vessel around the absorber has a pair of thin aluminum windows that separate the absorber vacuum space from adjacent vacuum spaces. Because the muon beam in MICE is of low intensity, there is no beam heating in the absorber. As a result, the absorber can be cooled using a single 4 K cooler. This report describes progress on the MICE liquid absorber and its cryogenic cooling system.
MPPT033	Development of a Superconducting Helical Undulator for a Polarised Positron Source	2295
	Y. Ivanyushenkov, F.S. Carr CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon D.P. Barber DESY, Hamburg E. Baynham, T.W. Bradshaw, J. Rochford CCLRC/RAL, Chilton, Didcot, Oxon J.A. Clarke, O.B. Malyshev, D.J. Scott, B.J.A. Shepherd CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire P. Cooke, J.B. Dainton, T. Greenshaw Liverpool University, Science Faculty, Liverpool G.A. Moortgat-Pick Durham University, Durham
	A method of producing a polarised positron beam from e⁺e^- pair production in a target by circularly polarised ?-radiation is being investigated. Polarised photons are to be generated by the passage of a high energy electron beam (250 GeV as anticipated in the International Linear Collider - ILC) through a helical undulator. For production of 20 MeV photons, an undulator with a period of 14 mm, a bore of approximately 4 mm and magnetic field on axis of 0.75 T is required. First prototypes have been constructed using both superconducting and permanent magnet technologies which are capable of producing the necessary magnetic field configuration in the undulator. This paper details the design, construction techniques and field measurement results of the first superconducting prototype and compares the results with simulation.
RPPT067	A High-Power Target Experiment	3745
	H.G. Kirk, S.A. Kahn, H. Ludewig, R. Palmer, V. Samulyak, N. Simos, T. Tsang BNL, Upton, Long Island, New York J.R.J. Bennett CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon T.W. Bradshaw, P. Drumm, T.R. Edgecock, Y. Ivanyushenkov CCLRC/RAL, Chilton, Didcot, Oxon I. Efthymiopoulos, A. Fabich, H. Haseroth, F. Haug, J. Lettry CERN, Geneva T.A. Gabriel, V.B. Graves, J.R. Haines, P.T. Spampinato ORNL, Oak Ridge, Tennessee Y. Hayato, K. Yoshimura KEK, Ibaraki K.T. McDonald PU, Princeton, New Jersey
	Funding: U.S. Department of Energy. We describe an experiment designed as a proof-of-principle test for a target system capable of converting a 4 MW proton beam into a high-intensity muon beam suitable for incorporation into either a neutrino factory complex or a muon collider. The target system is based on exposing a free mercury jet to an intense proton beam in the presence of a high strength solenoidal field.