Paper |
Title |
Page |
MOPOST058 |
Studies on the Vertical Half-Integer Resonance in the CERN PS Booster |
222 |
SUSPMF074 |
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- T. Prebibaj, F. Antoniou, F. Asvesta, H. Bartosik
CERN, Meyrin, Switzerland
- G. Franchetti
GSI, Darmstadt, Germany
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Following the upgrades of the LHC Injectors Upgrade Project (LIU), the Proton Synchrotron Booster (PSB) at CERN successfully delivers beams with double brightness. An important contributing factor for this was the dynamic correction of the beta-beating induced by the injection chicane, which allowed stable operation closer to the half-integer resonance. Ideally, injection above the half-integer resonance could further improve the beam brightness. In this context, a series of studies were initiated in order to characterize the effects of space charge when crossing the half-integer resonance. In this contribution, the first results of these investigations are reported.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-MOPOST058
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About • |
Received ※ 03 June 2022 — Revised ※ 14 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 24 June 2022 |
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WEIZSP2 |
Trapping of Neutral Molecules by the Electromagnetic Beam Field |
1649 |
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- G. Franchetti
GSI, Darmstadt, Germany
- F. Zimmermann
CERN, Meyrin, Switzerland
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Neutral uncharged molecules are affected by the electromagnetic field of a charged particle beam if they carry either an electric or a magnetic dipole moment. The residual gas in an accelerator beam pipe consists of such molecules. In this paper we study their dynamics. Under a few approximations, whose validity we explore and justify, we derive the equations of motion of neutral molecules and their invariants, determine the conditions for these neutral molecules to become trapped in the field of the beams as function of beam-pipe temperature, and compute the resulting enhancement of molecule density in the vicinity of the beam. We demonstrate that large agglomerates of molecules, "flakes," are much more likely to be pulled into the beam than single molecules, and suggest that this phenomenon might help explain some beam observations at the Large Hadron Collider.
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Slides WEIZSP2 [6.142 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-WEIZSP2
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About • |
Received ※ 07 June 2022 — Revised ※ 16 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 22 June 2022 |
Cite • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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