| Paper |
Title |
Page |
| MOPCH136 |
China Spallation Neutron Source Accelerators: Design, Research, and Development
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366 |
| |
- J. Wei
BNL, Upton, Long Island, New York
- S.X. Fang, S. Fu
IHEP Beijing, Beijing
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The Beijing Spallation Neutron Source (BSNS) is a newly approved high power accelerator project based on a H- linear accelerator and a rapid cycling synchrotron. During the past year, several major revisions were made to the design including the type of the front end, linac frequency, transport layout, ring lattice, and type of ring components. Possible upgrade paths were also laid out: based on an extension of the warm linac, the ring injection energy and the beam current could be raised doubling the beam power on target to reach 200 kW; an extension with a superconducting RF linac of similar length could raise the beam power near 0.5 MW. Based on these considerations, research and development activities are started. In this paper, we discuss the rationale of design revisions and summarize the recent work.
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| MOPCH137 |
An Anti-symmetric Lattice for High Intensity Rapid-cycling Synchrotrons
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369 |
| |
- J. Wei, Y.Y. Lee, S. Tepikian
BNL, Upton, Long Island, New York
- S.X. Fang, Q. Qin, J. Tang, S. Wang
IHEP Beijing, Beijing
- S. Machida, C.R. Prior, G. Rees
CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
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Rapid cycling synchrotrons are used in many high power facilities like spallation neutron sources and proton drivers. In such accelerators, beam collimation plays a crucial role in reducing the uncontrolled beam loss. Furthermore, the injection and extraction section needs to reside in dispersion-free region to avoid couplings; a significant amount of drift space is needed to house the RF accelerating cavities; orbit, tune, and chromatic corrections are needed; long, uninterrupted straights are desired to ease injection tuning and to raise collimation efficiency. Finally, the machine circumference needs to be small to reduce construction costs. In this paper, we present a lattice designed to satisfy these needs. The lattice contains a drift created by a missing dipole near the peak dispersion to facilitate longitudinal collimation. The compact FODO arc allows easy orbit, tune, coupling, and chromatic correction. The doublet straight provides long uninterrupted straights. The four-fold lattice symmetry separates injection, extraction, and collimation to different straights. This lattice is chosen for the Beijing Spallation Neutron Source synchrotron.
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| WEPCH033 |
Single Particle Beam Dynamics Design of CSNS/RCS
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1996 |
| |
- S. Wang, S.X. Fang, Q. Qin, J. Tang
IHEP Beijing, Beijing
- J. Wei
BNL, Upton, Long Island, New York
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Rapid Cycling Synchrotron (RCS) is a key component of Beijing Spallation Neutron Source (BSNS). It accumulates and accelerates protons to design energy of 1.6 GeV and extracts high energy beam to the target. As a high beam density and high beam power machine, low beam loss is also a basic requirement. An optimal lattice design is essential for the cost and the future operation. The lattice design of BSNS is presented, and the related dynamics issues are discussed. The injection/extraction scheme and the beam collimation system design are introduced.
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