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Other Keywords |
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| MOCO03 |
Estimation of Longitudinal Profiles of Ion Bunches in the LHC Using Schottky-Based Diagnostics |
synchrotron, distributed, experiment, diagnostics |
45 |
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- K. Łasocha, D. Alves
CERN, Meyrin, Switzerland
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The Large Hadron Collider (LHC) Schottky monitors have been designed to measure various parameters of relevance to beam quality, namely tune, momentum spread and chromaticity. We present another application of this instrument - the evaluation of longitudinal bunch profiles. The relation between the distribution of synchrotron amplitudes within the bunch population and the longitudinal bunch profile is derived from probabilistic principles. Our approach, limited to bunched beams with no intra-bunch coherent motion, initially fits the cumulative power spectral density of acquired Schottky spectra with the underlying distribution of synchrotron amplitudes. The result of this fit is then used to reconstruct the bunch profile using the derived model. The results obtained are verified by a comparison with measurements from the LHC Wall Current Monitors.
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Slides MOCO03 [48.066 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2019-MOCO03
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| About • |
paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019 |
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| WECO01 |
Characterisation of Closed Orbit Feedback Systems |
controls, feedback, synchrotron, electron |
479 |
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- G. Rehm
DLS, Oxfordshire, United Kingdom
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Closed orbit feedback is applied at nearly all synchrotrons. Detailed investigations continue to be performed on the mathematical modelling of the spatial part (i.e. related to Orbit Response Matrix) and the dynamic part (i.e. the controller). This talk will serve as a summary of the ARIES workshop on closed orbit feedback organized by ALBA in November 2018. Benefits of recent advances compared to the traditional implementations will be highlighted.
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Slides WECO01 [4.912 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2019-WECO01
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| About • |
paper received ※ 06 September 2019 paper accepted ※ 20 November 2019 issue date ※ 10 November 2019 |
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| WEPP043 |
Time-of-flight Technique for Matching Energies in Electron Cooler |
electron, cavity, booster, gun |
645 |
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- I. Pinayev, R.L. Hulsart, K. Mernick, R.J. Michnoff, Z. Sorrell
BNL, Upton, New York, USA
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Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
Electron cooler with bunched electron beam is being commissioned at the Relativistic Heavy Ion Collider at BNL. For the cooler to operate the energies of the hadron and electron beams should be matched with high accuracy. We have developed time-of-flight technique based on the phase measurement of the beam induced signal in the beam position monitors separated by a drift. We present the method description and experimental results.
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Poster WEPP043 [9.892 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP043
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| About • |
paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019 |
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