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MOXAUD01 |
Performance of the 2 MeV Electron Cooler at COSY | |
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| The 2 MeV electron cooler is operated in the COSY ring since 2013. So far electron beam energy up to 1.5 MeV was demonstrated. Dedicated electron cooling studies with proton beams up to 1.66 GeV kinetic energy and electron beam current up to 0.9 A were carried out. A reduction of proton beam emittance by one order of magnitude within a few hundred seconds was observed. Overview of HV and electron beam commissioning activities is presented. Electron cooling results are discussed. | ||
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Slides MOXAUD01 [4.097 MB] | |
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| MOXAUD02 | Experimental Observation of Longitudinal Electron Cooling of DC and Bunched Proton Beam at 2425 MeV/c at COSY | 10 |
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| The 2 MeV electron cooling system for COSY-Julich started operation in 2013 years. The cooling process was observed in the wide energy range of the electron beam from 100 keV to 908 keV. Vertical, horizontal and longitudinal cooling was tested at bunched and continuous beams. The cooler was operated with electron current up to 0.9 A. This report deals with the description of the experimental observation of longitudinal electron cooling of DC and bunched proton beam at 2425 MeV/c at COSY. | ||
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Slides MOXAUD02 [10.860 MB] | |
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| MOYAUD02 | Stochastic Cooling of Heavy Ions in the HESR | 15 |
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| Due to the modularized start version (MSV) of the FAIR project with the postponed NESR, the HESR (High Energy Storage Ring) became very attractive for experiments with heavy ions. Although the HESR is optimized for the storage of antiprotons it is also well suited for heavy-ion beams with slightly changes in the optics. Within the MSV only stochastic cooling and no e-cooling will be available, but even the main 2-4 GHz stochastic cooling system will be capable to fulfill the beam requirements for heavy ions. Most critical parts of the active elements are the high power amplifiers. The stochastic cooling amplifiers for the HESR will be based on new GaN devices. Nonlinearities of these devices necessitate a dedicated analysis for use in stochastic cooling systems. | ||
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Slides MOYAUD02 [5.720 MB] | |
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| MOYAUD03 | Stochastic Cooling System for HESR - Theoretical and Simulation Studies | 20 |
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| The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. The HESR dedicates to the field of high-energy antiproton physics to explore the research areas of charmonium spectroscopy, hadronic structure, and quark-gluon dynamics with high-quality beams over a broad momentum range from 1.5 to 15 GeV/c. The facility provides the combination of powerful phase-space cooled antiproton beams and internal Pellet or gas jet targets to achieve the requirements of the experiment PANDA in terms of beam quality and luminosity. Recently, the feasibility of the HESR has been investigated for the application of cooled heavy ion beams with the special emphasis on the experimental program of the SPARC collaboration at FAIR. In this contribution an outline of the Fokker-Planck approach and particle tracking for momentum cooling assisted by a barrier bucket cavity with an internal target is given. A comparison of the filter and filter-less TOF cooling techniques including beam feedback is presented. Simulation and experimental studies at COSY to verify the predictions of the cooling theory complete the contribution. | ||
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Slides MOYAUD03 [4.508 MB] | |
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