| Paper |
Title |
Page |
| TUCOB01 |
Stochastic Cooling Project at the Experimental Storage Ring, CSRe at IMP
|
64 |
| |
- J. X. Wu, J. W. Xia, Y. Zhang
IMP, Lanzhou
- F. Caspers
CERN, Geneva
- T. Katayama, F. Nolden
GSI, Darmstadt
|
|
| |
Stochastic cooling at the experimental Cooler Storage Ring, CSRe at the Institute of Modern Physics (IMP) in China, will be used mainly for the experiments with radioactive fragment beams. Those RI beams arrive from the fragment separator with the emittance of 20-50 mm. mrad and the momentum spread Dp/p of ± 0.5~1.0 %. The equipped electron cooler is not able to cool down this hot beam within enough short period. Stochastic cooling is effective for these RI beams to reduce the emittance to less than 5 mm.mrad and Dp/p of 5·10-4 within 2-20 sec. After the stochastic pre-cooling, the electron cooling will further cool down the emittance and Dp/p within several seconds. The paper gives the design of the stochastic cooling system and the simulation results. The new developed forward traveling wave structure is presented as well as the measured results of test model.
|
|
|
Slides
|
|
| TUPS16 |
An Improved Forward Travelling Wave Structure Design for Stochastic Cooling at Experimental Cooler Storage Ring (CSRe) at the Institute of Modern Physics (IMP) in China
|
132 |
| |
- Y. Zhang, J. X. Wu
IMP, Lanzhou
- F. Caspers, L. Thorndahl
CERN, Geneva
- T. Katayama, F. Nolden
GSI, Darmstadt
|
|
| |
An improved forward travelling wave (TW) structure as the pick-up/kicker is designed for the stochastic cooling to match the field wave’s (phase) velocity to that of the beam. The theoretical analysis is performed together with the simulations of the propagation characteristics. Using CST Microwave Studio (CST MWS), the simulated results, including phase velocity, characteristics impedance, and distributions of the longitudinal fields, are implemented and compared with the experimented results. The improved forward TW structure can be satisfied the requirements of stochastic cooling project at CSRe, which the phase velocity is closed to 0.70 (matching the desired beam energy of 400 MeV/u) and the characteristics impedance is 17 ohm.
|
|