| Paper |
Title |
Page |
| TUPLT171 |
ORBIT Simulations of the SNS Accumulator Ring
|
1530 |
| |
- J.A. Holmes, S.C. Bunch, S.M. Cousineau, V.V. Danilov, S. Henderson, A. Shishlo
ORNL/SNS, Oak Ridge, Tennessee
- M. Plum
LANL, Los Alamos, New Mexico
- Y. Sato
IUCF, Bloomington, Indiana
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| |
As SNS undergoes construction, many detailed questions arise concerning strategies for commissioning and operating the accumulator ring. The ORBIT Code is proving to be an indispensible tool for addressing these questions and for providing guidance to the physicists and decision makers as operation draws near. This paper shows the application of ORBIT to a number of ring issues including exclusion of the HEBT RF cavities during commissioning, the detailed effect of the injection chicane magnets on the beam, the effects and correction of magnet alignment and multipole errors, debunching of the linac 402.5 MHz beam structure, the injection of self consistent uniform beam configurations, and initial electron cloud simulations.
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| WEPLT170 |
Injection Schemes for Self Consistent Space Charge Distributions
|
2224 |
| |
- V.V. Danilov, S.M. Cousineau, S. Henderson, J.A. Holmes, M. Plum
ORNL/SNS, Oak Ridge, Tennessee
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| |
This paper is based on recently found sets of self-consistent 2D and 3D time-dependent space charge distributions. A subset of these distributions can be injection-painted into an accumulator ring, such as Spallation Neutron Source Ring, to produce periodic space charge conditions. The periodic condition guarantees zero space-charge-induced halo growth and beam loss during injection. Practical aspects of such schemes are discussed, and simulations of a few specific cases are presented.
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| THPLT166 |
Development of Injection and Optics Control Applications for the SNS Accumulator Ring
|
2846 |
| |
- S.M. Cousineau, C. Chu, J. Galambos, S. Henderson, T. Pelaia, M. Plum
ORNL/SNS, Oak Ridge, Tennessee
- A.L. Leahman
WSSU, Winston-Salem, North Carolina
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A large suite of physics software applications is being developed to facilitate beam measurement and control in the SNS accumulator ring. Two such applications are an injection control and measurement application, and a ring optics control application. The injection application will handle measurement and control of the linac beam position and angle at the stripper foil, and will be used to measure the twiss parameters of the linac beam at the foil. The optics control application will provide knobs for machine working point, chromaticity, arc phase advance, and harmonic correction. Both applications are written within the standard in-house XAL framework. Presented here are first versions of the applications, along with plans for future development and testing.
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