| Paper |
Title |
Page |
| TUOCKI03 |
Observations and Modeling of Beam-Beam Effects at the Tevatron Collider
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725 |
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- A. Valishev
- Y. Alexahin, V. A. Lebedev, R. S. Moore, V. D. Shiltsev
Fermilab, Batavia, Illinois
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This report summarizes recent experience with beam-beam effects at the Tevatron collider. Improvements in the beam life time resulting from implementation of the new helical orbit are analyzed. Effects of second order chromaticity correction and beam-beam compensation with Electron Lenses are studied.
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Slides
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| WEYC01 |
Instabilities of Cooled Antiproton Beam in Recycler
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2009 |
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- A. V. Burov
- V. A. Lebedev
Fermilab, Batavia, Illinois
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Funding: Work supported by the US DoE under contract DE-AC02-07CH11359
The more beam is cooled, the less stable it is. In the Recycler Ring, antiprotons are cooled both with stochastic and electron cooling. To stabilize it against the resistive wall instability, a digital damper is successfully used. Digital dampers can be described as linear operators with explicit time dependence, and that makes a principle difference with analogous dampers. Theoretical description of the digital dampers is presented. Electron cooling makes possible a two-beam instability of the cooled beam with the electron beam. Special features of this instability are described, and the remedy is discussed.
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Slides
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| FRPMN062 |
OTR Interferometry Diagnostic for the A0 Photoinjector
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4144 |
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- G. M. Kazakevich
- H. Edwards, R. P. Fliller, V. A. Lebedev, S. Nagaitsev, R. Thurman-Keup
Fermilab, Batavia, Illinois
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Funding: Operated by Universities Research Association, Inc. for the U. S. Department of Energy under contract DE-AC02-76CH03000.
OTR interferometry (OTRI) is an attractive diagnostic for investigation of relativistic electron beam parameters. The diagnostic is currently under development at the A0 Photoinjector. This diagnostic is applicable for NML accelerator test facility that will be built at Fermilab. The experimental setups of the OTR interferometers for the Photoinjector prototype are described in the report. Results of simulations and measurements are presented and discussed.
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| FRPMS015 |
Correction of Second Order Chromaticity at Tevatron
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3922 |
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- A. Valishev
- G. Annala, V. A. Lebedev, R. S. Moore
Fermilab, Batavia, Illinois
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Correction of the second order betatron tune chromaticity is essential for operation at the working point near half integer resonance which is proposed as one of the ways to improve performance of the Tevatron. In this report the new chromaticity correction scheme with split sextupole families is described. Details of implementation and commissioning at the present working point are discussed.
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