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CERN Document Server Sök i 2,049 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.65 sekunder. 
1.
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LHC MD2930: Asynchronous Beam Dump Test with Bunched Beam / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT)) ; Wollmann, Daniel (CERN) et al.
This note summarises the results of LHC Machine Development (MD) 2930, which studied the beam-loss behaviour during asynchronous beam dumps at 450 GeV and at 6.5 TeV using bunched beam in the abort gap. [...]
CERN-ACC-NOTE-2020-0008. - 2020. - 10 p.
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LHC MD4044: Asynchronous Beam Dump Test with Bunched Beam at Flat Top / Wiesner, Christoph (CERN) ; Apollonio, Andrea (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Frankl, Matthias Immanuel ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Lechner, Anton (CERN) ; Magnin, Nicolas (CERN) et al.
This note summarises the LHC Machine Development (MD) 4044, which studied the beam-loss and quench behaviour during asynchronous beam dumps at injection and at top energy using bunched beam in the abort gap. [...]
CERN-ACC-NOTE-2020-0009. - 2020. - 15 p.
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Energy Deposition Studies and Analysis of the Quench Behavior in the Case of Asynchronous Dumps During 6.5 TeV LHC Proton Beam Operation / Frankl, Matthias (CERN) ; Bartmann, Wolfgang (CERN) ; Bednarek, Mateusz (CERN) ; Bracco, Chiara (CERN) ; Lechner, Anton (CERN) ; Verweij, Arjan (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
The CERN LHC beam dumping system comprises a series of septa and fast-pulsed kicker magnets for extracting the stored proton beams to the external beam dumps. Different absorbers in the extraction region protect superconducting magnets and other machine elements in case of abnormal beam aborts, where bunches are swept across the machine aperture. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-TUPAF028 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF028
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Asynchronous Beam Dump Tests at LHC / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Ducimetière, Laurent (CERN) ; Frankl, Matthias (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Heßler, Christoph (CERN) ; Kramer, Thomas (CERN) et al.
The detailed understanding of the beam-loss pattern in case of an asynchronous beam dump is essential for the safe operation of the future High Luminosity LHC (HL-LHC) with nearly twice the nominal LHC beam intensity, leading to correspondingly higher energy deposition on the protection elements. An asynchronous beam dump is provoked when the rise time of the extraction kickers is not synchronized to the 3 us long particle-free abort gap. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF063 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF063
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Abort Gap Keeper and Abort Gap Protection / Wiesner, C (CERN) ; Bartmann, W (CERN) ; Bracco, C (CERN) ; Carlier, E (CERN) ; Fraser, M (CERN) ; Goddard, B (CERN) ; Jacquet, D (CERN) ; Magnin, N (CERN) ; Wenninger, J (CERN)
In view of the newly implemented variable Abort Gap Keeper (AGK), this paper will review the protection layers that should prevent an injection of beam into the abort gap and identify the critical regions inside the abort gap. In particular, it will examine the accidental injection of several bunches into the abort gap after a filling-pattern change in September 2017 and discuss the lessons learned.
2019 - 5 p. - Published in : (2019) , pp. 141-145 Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.141-145
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LHC MD 2401: Beam-Based Measurement of the MKD Rise Time / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Fraser, Matthew Alexander (CERN) ; Hessler, Christoph ; Magnin, Nicolas (CERN) ; Renner, Elisabeth (Vienna University of Technology (AT))
This note summarises the beam-based measurements of the MKD rise time for both LHC beams performed during MD4 on December 2nd, 2017 and discusses the results [...]
CERN-ACC-NOTE-2020-0010. - 2018. - 6 p.
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MD#1182: Calibration of diamond particle detectors in IP6 / Valette, Matthieu (CERN) ; Wollmann, Daniel (CERN) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE)) ; Wiesner, Christoph (CERN)
In case of an asynchronous beam dump with a fully filled LHC machine it is expected that all standard ionisation chamber Beam Loss Monitors (IC BLM) around the LHC dumping region in IP6 will be saturated. [...]
CERN-ACC-2017-0018. - 2017. - 8 p.
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MD#2183: Calibration of the IR6 B2 diamond BLMs / Valette, Matthieu (CERN) ; Wollmann, Daniel (CERN) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE))
In case of an asynchronous beam dump with a fully filled LHC machine, causing ~40 bunches to impact on the movable dump protection absorber (TCDQ), it is expected that all standard ionisation chamber Beam Loss Monitors (IC BLM) around the LHC dumping region in IR6 will be saturated. [...]
CERN-ACC-2018-0011. - 2018. - 6 p.
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LBDS Performance in RUN 2 / Bracco, C ; Bartmann, W (CERN) ; Borburgh, J (CERN) ; Ducimetiere, L S (CERN) ; Carlier, E (CERN) ; Goddard, B (CERN) ; Magnin, N (CERN) ; Mottram, T D (CERN) ; Senaj, V (CERN) ; Wiesner, C (CERN)
The performance of the LHC Beam Dump System (LBDS) during Run 2 beam operations are presented in terms of rate and type of failures of the extraction (MKB) and dump (MKD) kickers. New faults were also identified and they are described together with their impact on the beam distribution at the dump protection elements and the TDE assembly. [...]
Geneva, Switzerland : , 2019 - 4 p. - Published in : , pp. 131-134 Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.131-134
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Consolidation of Re-Triggering System of LHC Beam Dumping System at CERN / Magnin, Nicolas (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Gräwer, Gregor (CERN) ; Mottram, Timothy (CERN) ; Renner, Elisabeth (CERN) ; Rodziewicz, Janusz (CERN) ; Senaj, Viliam (CERN) ; Wiesner, Christoph (CERN)
The Trigger Synchronization and Distribution System (TSDS) is a core part of the LHC Beam Dump System (LBDS). It comprises redundant Re-Trigger Lines (RTLs) that allow fast re-triggering of all high-voltage pulsed generators in case one self-triggers, resulting in a so-called asynchronous dump. [...]
2020 - 5 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA088 Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA088
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