| Paper |
Title |
Page |
| MOPCH138 |
Choice of Proton Driver Parameters for a Neutrino Factory
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372 |
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- W.-T. Weng, J.S. Berg, R.C. Fernow, J.C. Gallardo, H.G. Kirk, N. Simos
BNL, Upton, Long Island, New York
- S.J. Brooks
CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
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A Neutrino Factory typically comprises the following subsystems: proton driver; target; muon collection and conditioning( bunching, phase rotation, and cooling); muon acceleration; and muon decay ring. It takes great effort to design each subsystem properly, such that it can mesh with all other subsystems to optimize the overall facility performance. This optimization is presently being studied as part of the International Scoping Study of a Future Neutrino Factory and Superbeam Facility. This paper will evaluate the implications of other subsystems on the parameters of a proton driver for a Neutrino Factory. At the desired power of 4 MW, the impacts of the choice of the proton energy, bunch length, bunch intensity, and repetition rate on other subsystems are assessed to identify a proper range of operation for each parameter. A suitable "design phase space" of proton driver parameters is defined. Given possible choices of design parameters for proton driver, we compare the performance of a linac, a synchrotron, and an FFAG accelerator. The relative merits of existing proton driver proposals will also be examined.
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| TUPLS133 |
Material Irradiation Damage Studies for High Power Accelerators
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1816 |
| |
- N. Simos, H.G. Kirk, H. Ludewig, L.F. Mausner, J.G. O Conor
BNL, Upton, Long Island, New York
- S. Makimura, K. Yoshimura
KEK, Ibaraki
- K.T. McDonald
PU, Princeton, New Jersey
- L.P. Trung
Stony Brook University, Stony Brook
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High-performance targets intercepting multi MW proton beams are the key toward intense muon or neutrino beams. To achieve this goal one must push the envelope of the current knowledge on material science and material endurance and survivability to both short and long proton beam exposure. The demand imposed on the targets of high power accelerators and the limitations of most materials in playing such pivotal roles have led to an extensive search and experimentation with new alloys and composites. These new high-performance materials and composites, which at first glance, appear to possess the right combination of properties satisfying target requirements, are explored under accelerator target conditions where both shock and irradiation damage are at play. Results of the on-going, multi-phased experimental effort under way at BNL involving heavy irradiation of candidate materials using 200 MeV protons at the end of the BNL Linac as well as results on post-irradiation analysis assessing irradiation damage are presented.
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| WEPCH065 |
Lattices for High-power Proton Beam Acceleration and Secondary Beam Collection, Cooling, and Deceleration
|
2074 |
| |
- S. Wang
IHEP Beijing, Beijing
- K.A. Brown, C.J. Gardner, Y.Y. Lee, D.I. Lowenstein, S. Peggs, N. Simos, J. Wei
BNL, Upton, Long Island, New York
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Rapid-cycling synchrotrons are used to accelerate high-intensity proton beams to energies of tens of GeV for secondary beam production. After primary beam collision with a target, the secondary beam can be collected, cooled, accelerated or decelerated by ancillary synchrotrons for various applications. In this paper, we first present a lattice for the main synchrotron. This lattice has: a) flexible momentum compaction to avoid transition and to facilitate RF gymnastics b) long straight sections for low-loss injection, extraction, and high-efficiency collimation c) dispersion-free straights to avoid longitudinal-transverse coupling, and d) momentum cleaning at locations of large dispersion with missing dipoles. Then, we present a lattice for a cooler ring for the secondary beam. The momentum compaction across half of this ring is near zero, while for the other half it is normal. Thus, bad mixing is minimized while good mixing is maintained for stochastic beam cooling.
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| THPCH196 |
A Proof-of-Principle Experiment for a High-Power Target System
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3254 |
| |
- H.G. Kirk, V. Samulyak, N. Simos, T. Tsang
BNL, Upton, Long Island, New York
- J.R.J. Bennett
CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
- T.R. Edgecock
CCLRC/RAL, Chilton, Didcot, Oxon
- I. Efthymiopoulos, A. Fabich, H. Haseroth, F. Haug, J. Lettry
CERN, Geneva
- V.B. Graves, P.T. Spampinato
ORNL, Oak Ridge, Tennessee
- K.T. McDonald
PU, Princeton, New Jersey
- H.J. Park
PAL, Pohang, Kyungbuk
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The MERIT experiment, to be run at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoidal magnetic field.
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