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| MOM1I01 |
Status of the Recycler Ring
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1 |
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- P. Derwent
Fermilab, Batavia, Illinois
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Funding: US Department of Energy
I will present the current operational status of the Fermilab Recycler Ring. Using a mix of stochastic and electron cooling, we prepare antiproton beams for the Fermilab Tevatron Collider program.
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Slides
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| MOM1I02 |
Status of the Antiproton Decelerator and of the ELENA Project at CERN
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6 |
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- P. Belochitskii
CERN, Geneva
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The Antiproton Decelerator (AD) at CERN operates for physics since 2000. It delivers low energy antiprotons for production and study of antihydrogen, for atomic physics and for medical research. Two beam cooling systems, stochastic and electron, play key role in AD operation. They make transverse and longitudinal emittances small, which is obligatory condition for beam deceleration without losses, as well for physics. The machine performance is reviewed, along with plans for the future. Significant improvement of intensity and emittances of the beam delivered to the experiments could be achieved with the addition of a small ring suitable for further deceleration and cooling. The details of this new extra low energy antiproton ring (ELENA) and its status are presented.
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Slides
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| MOA2I04 |
Antiproton Production and Accumulation
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39 |
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- V. A. Lebedev
Fermilab, Batavia, Illinois
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Funding: Work supported by the Fermi Research Alliance, under contract DE-AC02-76CH03000 with the U. S. Dept. of Energy.
In the course of Tevatron Run II (2001-2007) improvements of antiproton production have been one of major contributors into the collider luminosity growth. Commissioning of Recycler ring in 2004 and making electron cooling operational in 2005 freed Antiproton source from a necessity to keep large stack in Accumulator and allowed us to boost antiproton production. That resulted in doubling average antiproton production during last two years. The paper discusses improvements and upgrades of the Antiproton source during last two years and future developments aimed on further stacking improvements.
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Slides
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| THM1I01 |
Commissioning and Performance of LEIR
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134 |
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The Low Energy Ion Ring (LEIR) is a key element of the LHC ion injector chain. Under fast electron cooling, several long pulses from the ion Linac 3 are accumulated and cooled, and transformed into short bunches with a density sufficient for the needs of the LHC. Experience from LEIR commissioning and the first runs in autumn 2006 and summer 2007 to provide the so-called "early LHC ion beam" for setting-up in the PS and the SPS will be reported. Studies in view of the beam needed for nominal LHC ion operation are carried out in parallel to operation with lower priority.
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Slides
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| THM1I03 |
Status of the FAIR Project
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The international Facility for Antiproton and Ion Research (FAIR) is a multi-purpose accelerator project. The main task is production of secondary beams. Therefore the production of high intensity primary beams and the application of beam cooling to the secondary beams are the prominent features of this facility. The most recent design aspects of the accelerator complex will be described. The status of negotiations towards an international facility will be given.
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Slides
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| THM2I04 |
Progress with Tevatron Electron Lenses
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144 |
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- V. Kamerdzhiev, Y. Alexahin, G. F. Kuznetsov, V. D. Shiltsev, X. Zhang
Fermilab, Batavia, Illinois
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Funding: Work supported by the U. S. Department of Energy under contract No. DE-AC02-07CH11359
The Tevatron Electron Lenses (TELs) were initially proposed for compensation of long-range and head-on beam-beam effects of the antiproton beam at 980 GeV. Recent advances in antiproton production and electron cooling led to a significant increase of antiproton beam brightness. It is now the proton beam that suffers most from the beam-beam effects. Discussed are the concept of Electron Lenses and commissioning of the second TEL in 2006-2007. The latest experimental results obtained during numerous studies with high energy proton beam are presented.
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Slides
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| THA2I01 |
Exciting New Physics with Stored and Cooled Single Ions
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- F. G. Bosch
GSI, Darmstadt
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Experiments addressing the beta decay of stored and cooled highly-charged ions will be presented and discussed. They have been conducted during the last decade at the facilities of GSI. There, the combination of a fragment separator (FRS) and of an ion storage-cooler ring (ESR) provided the very first opportunity to produce beta-unstable ions in-flight, to store and cool them over many hours in the ion ring by preserving their atomic charge state, and, finally, to observe time-resolved their beta decay. The astrophysical impact of those experiments is obvious: Stellar nucleosynthesis proceeds beyond iron via the interplay of neutron- or proton-capture and beta decay, at typical temperatures of 30–100 keV and, thus, at high atomic charge states. In particular, in this talk experiments concerning two-body beta decay (bound-state beta decay sc. orbital electron capture) of stored and cooled single ions at well-defined atomic charge states will be addressed, where for the first time the decay characteristics could be precisely investigated.
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Slides
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