| Paper |
Title |
Page |
| MOPC098 |
LHC Particle Collimation by Hollow Electron Beams
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292 |
| |
- V. D. Shiltsev, A. I. Drozhdin, V. Kamerdzhiev, G. F. Kuznetsov, L. G. Vorobiev
Fermilab, Batavia, Illinois
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Electron Lenses built and installed in Tevatron have proven themselves as safe and very reliable instruments which can be effectively used in hadron collider operation for a number of applications, including compensation of beam- beam effects, DC beam removal from abort gaps, as a diagnostic tool. In this presentation we consider a possibility of using electron lenses with hollow electron beam for ion and proton collimation in LHC.
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| TUPC044 |
Towards Routine Operation of the Digital Tune Monitor in the Tevatron
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1155 |
| |
- V. Kamerdzhiev, V. A. Lebedev, A. Semenov
Fermilab, Batavia, Illinois
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The digital tune monitor (DTM) was designed to measure bunch-by-bunch tunes in the Tevatron collider. It uses a standard BPM as a pickup. The vertical proton monitor is installed and allows us to gain valuable operational experience. A major upgrade is underway to implement an automatic bunch-by-bunch gain and offset adjustment to maintain the highest possible sensitivity under real operational conditions. Once the system is shown to be able to cope with orbit changes and different bunch intensities in an automatic manner while reliably delivering data it will be expanded to measure horizontal proton as well as antiproton tunes. The motivation and the technical description of the DTM as well as the latest experimental results are presented. Major challenges from the design and operation point of view are discussed.
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| THPC074 |
Observation of Coherent Oscillations of Colliding Bunches at the Tevatron
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3158 |
| |
- A. Valishev, V. Kamerdzhiev, V. A. Lebedev
Fermilab, Batavia, Illinois
- F. A. Emanov
BINP SB RAS, Novosibirsk
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Commissioning of the new digital tune monitor (DTM) at the Tevatron made it possible to observe vertical dipole oscillations of individual bunches at any time during an HEP store. Since all the bunches have significantly different collision conditions, this device provides vast possibilities for investigation of coherent beam-beam effects. We present theoretical model and experimental observations of coherent beam-beam modes. Analysis of the DTM data and its agreement with theory are discussed.
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| THPP058 |
Progress with Electron Beam System for the Tevatron Electron Lenses
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3500 |
| |
- V. Kamerdzhiev, G. F. Kuznetsov, G. W. Saewert, V. D. Shiltsev
Fermilab, Batavia, Illinois
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We have developed , built and tested two novel electron guns for the Tevatron and RHIC electron lenses: the first, a gridded gun which generates electron beam profile with smoothed edges and broad flat-top; the second, Gaussian beam profile gun which can be used for generation of the profile with depressed emission in the center. We have also developed a new type of HV modulator for use in TELs. In this articel, we desicribe the guns and the modulator, and present results of the bench tests.
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