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1.
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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2.
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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3.
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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4.
LHC MD4243: Q22 optics in TI2 / Velotti, Francesco Maria (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Goddard, Brennan (CERN) ; Hessler, Christoph ; Kain, Verena (CERN) ; Chapochnikova, Elena (CERN) ; Timko, Helga (CERN)
This MD shows the feasibility of operating TI2 with an optics matched to the SPS Q22 optics.Optics studies in the transfer line (TL) were performed together with an injection voltage scan toassess, also, the longitudinal quality of the injected single bunch..
CERN-ACC-NOTE-2019-0054.
- 2019. - 5 p.
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5.
Reliability Considerations for the LHC MKB Re-trigger Upgrade During LS2 / Renner, Elisabeth (Vienna University of Technology (AT)) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Magnin, Nicolas (CERN) ; Wiesner, Christoph (CERN)
An upgrade of the LHC dilution kicker system (MKB) during LS2 foresees the new implementation of a MKB re-trigger mechanism. [...]
CERN-ACC-2019-0055.
- 2018. - 37 p.
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6.
LHC Full Energy Exploitation Study: Operation at 7 TeV / Bruning, Oliver (CERN) ; Garcia Alia, Ruben (CERN) ; Antoniou, Fanouria ; Apollonio, Andrea (CERN) ; Arduini, Gianluigi (CERN) ; Baglin, Vincent (CERN) ; Bartmann, Wolfgang (CERN) ; Bednarek, Mateusz Jakub (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) et al.
This is the first report of a three volume study on the full energy exploitation of the LHC. [...]
CERN-ACC-2017-0086.
- 2017. - 51 p.
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7.
Upgrade of the Dilution System for HL-LHC / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Calviani, Marco (CERN) ; Carlier, Etienne (CERN) ; Ducimetière, Laurent (CERN) ; Frankl, Matthias (CERN) ; Fraser, Matthew (CERN) ; Gilardoni, Simone (CERN) ; Goddard, Brennan (CERN) et al.
The LHC Beam Dump System is one of the most critical systems for reliable and safe operation of the LHC. A dedicated dilution system is required to sweep the beam over the front face of the graphite dump core in order to reduce the deposited energy density. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF062 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF062
8.
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
9.
A Beam-based Measurement of the LHC Beam Dump Kicker Waveform / Fraser, Matthew (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Magnin, Nicolas (CERN) ; Uythoven, Jan (CERN) ; Velotti, Francesco (CERN)
The increase of the LHC collision energy to 13 TeV after Long Shutdown 1 has doubled the operational energy range of the LHC beam dump system (LBDS) during Run 2. In preparation for the safe operation of the LHC, the waveform of the LBDS extraction kicker was measured using beam-based measurements for the first time during the machine's re-commissioning period. [...]
CERN-ACC-2016-137.- 2016 - 3 p. - Published in : 10.18429/JACoW-IPAC2016-THPOR052 Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR052
10.
LHC Beam Dump Performance in View of the High Luminosity Upgrade / Wiesner, Christoph (CERN) ; Bartmann, Wolfgang (CERN) ; Bracco, Chiara (CERN) ; Carlier, Etienne (CERN) ; Ducimetière, Laurent (CERN) ; Frankl, Matthias (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kramer, Thomas (CERN) ; Lechner, Anton (CERN) et al.
The High Luminosity Large Hadron Collider (HL-LHC) project will increase the total beam intensity in the LHC by nearly a factor of two. Analysis and follow-up of recent operational issues as well as dedicated studies of the LHC Beam Dump System (LBDS) have been carried out to ensure the safe operation with HL-LHC parameters and to decide on possible hardware upgrades to meet the HL-LHC requirements. [...]
CERN-ACC-2017-159.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-WEPIK033 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPIK033

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