| Paper |
Title |
Page |
| TUOCAB01 |
A New Code for Orbit Response Matrix Analysis
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804 |
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- L. Yang, S.-Y. Lee
IUCF, Bloomington, Indiana
- X. Huang
SLAC, Menlo Park, California
- B. Podobedov
BNL, Upton, Long Island, New York
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Funding: NSF PHY-0552389, DOE DE-FG02-92ER40747
The Orbit Response Matrix (ORM) has been successfully used extensively in accelerator modeling. However, in many cases, the existing codes can not find a correct model. We develop a new code that solve the convergence and coupling problems. We test our code by carrying out systematic study of accelerator models. Effects measurement errors and the completeness of information will be addressed in this study. Possible inclusion of phase information will be discussed.
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Slides
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| TUPMS007 |
NSLS VUV Ring Lifetime Study
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1203 |
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- L. Yang, S.-Y. Lee
IUCF, Bloomington, Indiana
- S. L. Kramer, B. Podobedov
BNL, Upton, Long Island, New York
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Beam lifetime at VUV ring of National Synchrotron Light Source(NSLS) at BNL is limited by Touschek effect. This effect is affected by momentum acceptance and beam density. The geometry near injection septum, dynamic aperture and the RF acceptance all can limit the over all momentum acceptance. Extensive experiments including coupling, gas scattering, RF acceptance, have been done for understanding the lifetime, and the result is confirmed with theoretical predictions.
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| TUPMS078 |
IBS Effects in a Wiggler Dominated Light Source
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1353 |
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- B. Podobedov
BNL, Upton, Long Island, New York
- L. Yang
IUCF, Bloomington, Indiana
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Intra-beam scattering (IBS) is often thought of as a fundamental limitation to achieving lower emittance and hence higher brightness in modern storage ring light sources. However, as we show in this paper analytically and by simulations using SAD code, this limitation may no longer be relevant in a wiggler dominated 3rd generation light source. Instead, lowering the emittance by increasing the amount of wiggler radiation does not result in significant IBS induced emittance blow-up, as higher beam density (and IBS rates) is compensated by faster radiation damping. We show that under some practical assumptions the relative ratio of the emittance including the IBS effect to the emittance at zero current is emittance independent.
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