| Paper |
Title |
Page |
| MOP075 |
Benchmarking of Measurement and Simulation of Transverse RMS-Emittance Growth Along an Alvarez DTL
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251 |
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- L. Groening, W. Barth, W.B. Bayer, G. Clemente, L.A. Dahl, P. Forck, P. Gerhard, I. Hofmann, G.A. Riehl, S. Yaramyshev
GSI, Darmstadt
- D. Jeon
ORNL, Oak Ridge, Tennessee
- D. Uriot
CEA, Gif-sur-Yvette
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Funding: CARE, contract number RII3-CT-2003-506395) European Community INTAS Project Ref. no. 06-1000012-8782
Transverse emittance growth along the Alvarez DTL section is a major concern with respect to the preservation of beam quality of high current beams at the GSI UNILAC. In order to define measures to reduce this growth appropriate tools to simulate the beam dynamics are indispensable. This paper is on benchmarking of three beam dynamics simulation codes, i.e. DYNAMION, PARMILA, and PARTRAN against systematic measurements of beam emittance growth for different machine settings. Experimental set-ups, data reduction, the preparation of the simulations, and the evaluation of the simulations will be described. It was found that the mean value of final horizontal and vertical rms-emittances can be reproduced well by the codes.
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| MOP106 |
Prediction of 4ν=1 Resonance of a High Intensity Linac
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323 |
| |
- D. Jeon
ORNL, Oak Ridge, Tennessee
- G. Franchetti, L. Groening, I. Hofmann
GSI, Darmstadt
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The 4ν=1 resonance of a linac is found when the depressed tune is around 90 deg. It is observed that this fourth order resonance is dominating over the better known envelope instability and practically replacing it. Simulation study shows a clear emittance growth by this resonance and its stopband. Experimental measurement of the stopband of this resonance is proposed and conducted in early 2008 using the UNILAC at GSI. This study will serve as a excellent benchmarking.
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