| Paper |
Title |
Page |
| TUPS19 |
Simulation Study of Barrier Bucket Accumulation with Stochastic Cooling at the GSI ESR
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136 |
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- T. Katayama, F. Nolden, G. Schreiber, M. Steck
GSI, Darmstadt
- T. Kikuchi
Nagaoka University of Technology, Nagaoka, Niigata
- H. Stockhorst
FZJ, Jülich
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The beam accumulation experiments with use of barrier bucket cavity and stochastic cooling was successfully performed at the ESR, GSI. The two methods of barrier voltage operation, moving barrier and fixed barrier cases were tried, and for some cases the electron cooling was additionally employed as well as the stochastic cooling. In the present paper, the beam accumulation process are simulated with particle tracking method where the cooling force (stochastic and electron cooling), the diffusion force and the barrier voltage force are included as well as the IBS diffusion effects. The simulation results are well in agreement with the experimental results.
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| TUPS20 |
Demonstration of Longitudinal Stacking in the ESR with Barrier Buckets and Stochastic Cooling
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140 |
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- M. Steck, C. Dimopoulou, B. Franzke, O. E. Gorda, T. Katayama, F. Nolden, G. Schreiber
GSI, Darmstadt
- I. N. Meshkov, A. O. Sidorin, G. V. Trubnikov
JINR, Dubna, Moscow Region
- D. Möhl
CERN, Geneva
- R. Stassen, H. Stockhorst
FZJ, Jülich
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Fast longitudinal beam accumulation has been demonstrated in the ESR at GSI with an Ar18+ beam coming from the synchrotron SIS18 at 400 MeV/u. Continuous application of stochastic cooling in all three phase space directions, merges the stack with the new injected bunch. Longitudinal beam compression was achieved by using either short barrier bucket rf pulses or by successive injections onto the unstable fixed point of the rf bucket at h=1. This recent experiment in the ESR provides the proof of principle for the planned longitudinal stacking of pre-cooled antiprotons in the HESR, injected from the CR.
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