PAC07 - List of Authors (Kirk, H. G.)

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Kirk, H. G.

Paper	Title	Page
MOPAS094	A High-Power Target Experiment at the CERN PS	646
	H. G. Kirk BNL, Upton, Long Island, New York J. R.J. Bennett STFC/RAL/ASTeC, Chilton, Didcot, Oxon O. Caretta, P. Loveridge STFC/RAL, Chilton, Didcot, Oxon A. J. Carroll, V. B. Graves, P. T. Spampinato ORNL, Oak Ridge, Tennessee I. Efthymiopoulos, A. Fabich, F. Haug, J. Lettry, M. Palm CERN, Geneva K. T. McDonald PU, Princeton, New Jersey N. V. Mokhov, S. I. Striganov Fermilab, Batavia, Illinois
	We test a target concept of a free-flowing mercury stream embedded in a high-field solenoid. The goal is to demonstrate the copious production of secondary pions and tertiary muons in a megawatt class proton beam at the front end of a neutrino factory or muon collider. Key components are described and results of the experimental commissioning phase are given.
TUXKI01	Advances in High Power Targets	676
	H. G. Kirk BNL, Upton, Long Island, New York
	High power targets are one of the major issues for both neutron sources and neutrino factories. The paper will review status of studies worldwide, including those at JPARC and SNS etc. Results from the MERIT liquid-jet Hg target experiment at CERN will also be covered.
	Slides
THPMS022	6 Dimensional Muon Phase Space Cooling by Using Curved Lithium Lenses	3047
	Y. Fukui, D. B. Cline, A. A. Garren UCLA, Los Angeles, California H. G. Kirk BNL, Upton, Long Island, New York
	A curved Lithium lens ring model can provide the emittance exchange mechanism in obtaining the muon 6 dimensional phase space cooling. With straight Lithium lenses in a muon cooling ring, only transverse phase space cooling has been demonstrated. We demonstrate the 6 dimensional phase space cooling with various parameters of a muon cooling ring in tracking simulation.
THPMS068	Systems Testing of a Free Hg Jet System for Use in a High-Power Target Experiment	3136
	V. B. Graves, A. J. Carroll, P. T. Spampinato ORNL, Oak Ridge, Tennessee I. Efthymiopoulos, A. Fabich CERN, Geneva H. G. Kirk, H. Park, T. Tsang BNL, Upton, Long Island, New York K. T. McDonald PU, Princeton, New Jersey P. Titus MIT/PSFC, Cambridge, Massachusetts
	Funding: U. S. Deparment of Energy contract DE-AC05-00OR22725 The design and operational testing of a mercury jet delivery system is presented. The equipment is part of the Mercury Intense Target (MERIT) Experiment, which is a proof-of-principle experiment to be conducted at CERN in the summer of 2007 to determine the feasibility of using an unconstrained jet of mercury as a target in a Neutrino Factory or Muon Collider. The Hg system is capable of producing a 1 cm diameter, 20 m/s jet of Hg inside a high-field solenoid magnet. A high-speed optical diagnostic system allows observation of the interaction of the jet with a 24 GeV proton beam. Performance of the Hg system will be presented, along with results of integrated systems testing without a beam.
THPMS086	Plasma Lens for US Based Super Neutrino Beam at Either FNAL or BNL	3184
	A. Hershcovitch, M. Diwan, J. C. Gallardo, B. M. Johnson, H. G. Kirk, W.-T. Weng BNL, Upton, Long Island, New York E. Garate, A. van Drie University of California IIrvine, Irvine, California S. A. Kahn Muons, Inc, Batavia N. Rostoker UCI, Irvine, California
	Funding: Work supported under Contract No. DE-AC02-98CH1-886 with the US Department of Energy Plasma lens concept is examined as an alternative to focusing horns and solenoids for a neutrino beam facility. The concept is based on a combined high-current lens/target configuration. Current is fed at an electrode located downstream from the beginning of the target where pion capturing is needed. Some of the current flows through the target, while the rest is carried by plasma outside the target. A second plasma lens section, with an additional current feed, follows the target. Plasma of this section is immersed in a solenoidal magnetic field to facilitate its current profile shaping to optimize pion capture. Simulation of the second section alone yielded a 10% higher neutrino production than the horn system. Plasma lenses have additional advantages: larger axial currents, high signal purity: minimal neutrino background in anti-neutrino runs. Lens medium consists of plasma, consequently, particle absorption and scattering is negligible. Withstanding high mechanical and thermal stresses is not an issue. Results of capturing and focusing obtained for various plasma lens configurations will be presented.
THPMS090	A Complete Scheme of Ionization Cooling for a Muon Collider	3193
	R. B. Palmer, J. S. Berg, R. C. Fernow, J. C. Gallardo, H. G. Kirk BNL, Upton, Long Island, New York Y. Alexahin, D. V. Neuffer Fermilab, Batavia, Illinois S. A. Kahn Muons, Inc, Batavia D. J. Summers UMiss, University, Mississippi
	Funding: Work Supported by the United States Department of Energy, Contract No. DE-AC02-98CH10886. We propose a complete scheme for cooling a muon beam for a muon collider. We first outline the parameters required for a multi-TeV muon collider. The cooling scheme starts with the front end of the Study 2a proposed Neutrino Factory. This yields bunch trains of both muon signs. Emittance exchange cooling in upward climbing helical lattices then reduces the longitudinal emittance until it becomes possible to combine the trains into single bunches, one of each sign. Further cooling is now possible in emittance exchange cooling rings. Final cooling to the required parameters is achieved in 50 T solenoids that use high temperature superconductor. Preliminary simulations of each element will be presented.