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| MOBP02 | FAIR at GSI | ion, storage-ring, synchrotron, heavy-ion | 24 | ||
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A new faciliy for antiproton and ion research (FAIR) is being planned and prepared to be built at GSI, Germany. R&D and prototype design is presently conducted at GSI and several other institutes worldwide, representing the future FAIR member states. Furthermore a major upgrade program for the running GSI accelerators, the heavy ion linac UNILAC and the heavy ion synchrotron SIS18 has been started. In parallel, the plannings for buildings and tunnels and the permit procedure for construction were launched. The new facility will consist of a two stage heavy ion synchrotron SIS100/300 for the generation of intense heavy ion and proton beams. These beams can be delivered wether as short compressed bunches for the production of secondary beams with subsequent processing in storage rings or as slow extracted beams with high duty cycle for fixed target experiments. The quality and intensity of the produced secondary beams (rare isotope and antiproton beams) will be significantly improved in a number of storage rings used for stacking, beam cooling and for internal target experiments.
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| MOCP01 | Beam intensity upgrade at Fermilab | proton, booster, target, extraction | 34 | ||
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| WEAY01 | New advances in beam cooling | electron, ion, storage-ring, beam-cooling | 162 | ||
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New developments in beam cooling since ICFA’2004 seminar are presented with concentration on trends in electron cooling, stochastic cooling, muon cooling and beam crystallization - the trends, which, as one can expect, will mark the future in the cooling methods applications.
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Keywords: particle storage rings, cooling methods, electron beam, Schottky noise. |
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| WEAY02 | Electron cooling of 8 GeV antiprotons at Fermilab’s Recycler: Results and operational implications | electron, emittance, extraction, beam-losses | 182 | ||
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Electron cooling of 8 GeV antiprotons at Fermilab’s Recycler storage ring is now routinely used in the collider operation. It requires a 0.1-0.5 A, 4.3 MeV DC electron beam that reduces the longitudinal phase-space of the circulating antiproton beam. This paper first describes the characteristics of the electron beam that was achieved to successfully cool antiprotons as well as its necessary stability. Then, results from various cooling force measurements along with comparison to a simple non-magnetized model will be presented. Finally, operational aspects of the implementation of electron cooling at the Recycler will be discussed, such as regulation of the cooling rate and the influence of the electron beam on the antiprotons lifetime.
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| THAY02 | Progress in slip stacking and barrier-RF | injection, booster, target, simulation | 293 | ||
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Slip stacking for pbar production has been operational since December 2004 and increased the beam intensity on pbar target more than 60%. We plan to use slip stacking for NuMI neutrino experiment for effectively increasing intensity to NuMI target by about a factor two in a 2.2 sec MI cycle. In parallel with slip stacking, we plan to study fast momentum stacking using barrier buckets. One barrier rf system has been installed and tested, and second system is being installed during the current shutdown.
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| THAY06 | Fast-Pulsed Superconducting Magnets | dipole, ion, synchrotron, quadrupole | 324 | ||
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Up to now only one synchrotron (Nuclotron at JINR, Dubna) has been equipped with fast-pulsed superconducting magnets. The demand for high beam intensities leads to the requirement of fast-pulsed, periodically cycling magnets for synchrotrons and fast-pulsed magnets for storage rings. An example is FAIR (Facility for Antiproton and Ion Research) at GSI, which will consist of two synchrotrons in one tunnel and several storage rings. The fast field ramp rate and repetition frequency introduce many magnet design problems and constraints in the operation of the accelerator. Persistent currents in the superconductor and eddy currents in wire, cable, iron and vacuum chamber reduce the field quality and generate cryogenic losses. A magnet lifetime of 20 years is anticipated, resulting in up to 108 magnet cycles. Therefore special attention has to be paid to magnet material fatigue problems. R&D work is being done in collaboration with many institutions, to reach the requirements mentioned above. Model dipoles were built and tested. The results of the R&D are reported. The advantages of the use of low field, fast pulsed superconducting, compared to resistive, magnets will be discussed.
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