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CERN Document Server 2,048 records found  1 - 10próximoend  jump to record: Search took 0.68 seconds. 
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MD2191 – β∗–Reach: 2017 IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Azzopardi, Gabriella (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Valuch, Daniel (CERN)
This report summarises the results of MD2191 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance. [...]
CERN-ACC-NOTE-2021-0020. - 2021. - 19 p.
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MD1447 –β∗–Reach: 2016 IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio (CERN) ; Amorim, David (U. Grenoble Alpes) ; Biancacci, Nicolo (CERN) ; Bonanno, Edoardo (Palermo U.) ; Carver, Lee Robert (Liverpool U.) ; Ferrazza, Diego (INFN, Rome ; Rome U.) ; Lefevre, Thibaut (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Quaranta, Elena (CERN) et al.
This report summarizes the results of MD1447 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance, performed during MD block 1 of 2016. [...]
CERN-ACC-NOTE-2020-0021. - 2020. - 24 p.
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MD2193 – Impedance Measurements of the TCSPM Prototype Collimator / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Arsenyev, Sergey ; Azzopardi, Gabriella (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fitterer, Miriam ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Lamas Garcia, Inigo et al.
In view of the HL–LHC project, it is planned to exchange 9 out 11 of the LHC secondary collimators in IR7, made of graphite, with low–impedance ones. [...]
CERN-ACC-NOTE-2021-0021. - 2021. - 17 p.
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β*-Reach – IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (CERN) ; Kwee-Hinzmann, Regina (University of London (GB)) ; Metral, Elias (CERN) ; Mirarchi, Daniele (CERN) ; Quaranta, Elena (Politecnico di Milano (IT)) ; Redaelli, Stefano (CERN) ; Rossi, Adriana (CERN) et al.
This report summarises the results of the MD314 about the hierarchy limit of the IR7 collimation system and its impedance. [...]
CERN-ACC-NOTE-2016-0007. - 2016. - 15 p.
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Staged implementation of low-impedance collimation in IR7: plans for LS2 / Redaelli, Stefano (CERN) ; Antipov, Sergey (CERN) ; Biancacci, Nicolo (CERN) ; Bertarelli, Alessandro (CERN) ; Bruce, Roderik (CERN) ; Carra, Federico (CERN) ; Gobbi, Giorgia (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN)
The HL-LHC upgrade baseline foresees to replace all secondary collimators of IR7 until LS3 in order to ensure a sufficient margin for beam stability with the high-brightness upgraded beams. [...]
CERN-ACC-NOTE-2019-0001. - 2019. - 30 p.
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MD 755: Instability threshold and tune shift study with reduced retraction between primary and secondary collimators in IR7 / Carver, Lee Robert (CERN) ; Biancacci, Nicolo (CERN) ; Mereghetti, Alessio (CERN) ; Bruce, Roderik (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Nisbet, David (CERN) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN)
The purpose of this MD is to quantify in terms of stabilising octupole current threshold the impedance change when reducing the retraction between the primary and secondary collimators in IR7. [...]
CERN-ACC-NOTE-2016-0005. - 2016. - 9 p.
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Betatron Cleaning for Heavy Ion Beams with IR7 Dispersion Suppressor Collimators / Hermes, Pascal Dominik (CERN ; U. Munster) ; Bruce, Roderik (CERN) ; Jowett, John (CERN) ; Redaelli, Stefano (CERN)
The betatron collimators in IR7 constitute the backbone of the collimation system of the LHC. A fraction of the secondary halo protons or heavy-ion fragments, scattered out of the primary collimator, is not captured by the secondary collimators but hits cold magnets in the IR7 dispersion suppressor (DS) where the dispersion starts to increase. [...]
CERN-ACC-2015-0193.- Geneva : CERN, 2015 - 3 p. Fulltext: PDF;
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.TUPTY025
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LHC Heavy-Ion Collimation Quench Test at 6.37Z TeV / Hermes, Pascal Dominik (Westfaelische Wilhelms-Universitaet Muenster (DE)) ; Auchmann, Bernhard (CERN) ; Bruce, Roderik (CERN) ; Hofle, Wolfgang (CERN) ; Holzer, Eva Barbara (CERN) ; Kalliokoski, Matti (Helsinki Institute of Physics (FI)) ; Kotzian, Gerd (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Quaranta, Elena (Politecnico di Milano (IT)) et al.
This note summarizes the collimation quench test MD with 208Pb82+ beams at 6.37Z TeV in which a quench of a dipole magnet in the dispersion suppressor (DS) downstream of the betatron collimation region (IR7) was achieved. [...]
CERN-ACC-NOTE-2016-0031. - 2016. - 10 p.
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MD1875 – Impedance Contribution of Single IR7 Secondary Collimators / Mereghetti, Alessio (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Metral, Elias (CERN) ; Mirarchi, Daniele (University of Manchester (GB)) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN)
This report summarises the results of MD1875 about impedance measurements of single LHCsecondary collimators in IR7. [...]
CERN-ACC-NOTE-2020-0022. - 2020. - 8 p.
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MD 2179: Scraping of off-momentum halo after injection / Garcia Morales, Hector (University of London (GB)) ; Bruce, Roderik (CERN) ; Patecki, Marcin (Warsaw University of Technology (PL)) ; Wretborn, Sven Joel (Linkoeping University (SE))
In this MD, a beam scraping was performed using the momentum primary collimator in IR3 where dispersion is high. [...]
CERN-ACC-NOTE-2018-0015. - 2018. - 7 p.
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