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MD2490 – Measurement of the TMCI threshold at flat-top in the LHC / Albert, Markus (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fuchsberger, Kajetan ; Mereghetti, Alessio ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) et al.
This report summarizes the results of MD2490 on the measurement of the intensity threshold of the Transverse Mode Coupling Instability (TMCI) in the LHC at flat top. [...]
CERN-ACC-NOTE-2020-0056.
- 2020.
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MD3318 – Impedance Contribution of Secondary and Tertiary Collimators / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN) ; Valuch, Daniel (CERN)
This report summarises the results of MD3318 about impedance measurements of individual LHC secondary and tertiary collimators. [...]
CERN-ACC-NOTE-2020-0033.
- 2020. - 11 p.
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Single bunch stability threshold with at orbit (MD2870) / Buffat, Xavier (CERN) ; Amorim, David (Centre National de la Recherche Scientifique (FR)) ; Antipov, Sergey (CERN) ; Barraud, Laurent (Centre National de la Recherche Scientifique (FR)) ; Biancacci, Nicolo (CERN) ; Mazzacano, Giacomo (Centre National de la Recherche Scientifique (FR)) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Salvant, Benoit (CERN) et al.
The results of an experiment demonstrating the absence of impact of the crossing angle in all IPs on the coherent stability of the beams at top energy in the LHC are presented..
CERN-ACC-NOTE-2018-0012.
- 2018. - 4 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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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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MD3310 – Complex tune shift measurement at flat-top in the LHC / Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Hemelsoet, Georges-Henry (CERN) ; Levens, Tom (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) et al.
This note summarises the MD3310 activity. [...]
CERN-ACC-NOTE-2020-0053.
- 2020. - 6 p.
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MD 346: Summary of single bunch instability threshold measurements / Carver, Lee Robert (CERN) ; Biancacci, Nicolo (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Trad, Georges (CERN)
The purpose of this MD is to measure the octupole current threshold to reach single-bunch stability in the LHC at flat top. [...]
CERN-ACC-NOTE-2016-0002.
- 2016. - 8 p.
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MD 4145: Study of Landau damping with an Antidamper / Antipov, Sergey (CERN) ; Albert, Markus (CERN) ; Amorim, David (U. Grenoble Alpes) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carideo, Emanuela (Sannio U.) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (Darmstadt, GSI) ; Trad, Georges (CERN) et al.
Landau damping is an essential mechanism for ensuring the transverse beam stability in LHC and its upgrades. [...]
CERN-ACC-NOTE-2019-0034.
- 2019. - 17 p.
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MD3308 – Growth rate versus chromaticity measurement at injection / Amorim, David (CERN) ; Antipov, Sergey (CERN) ; Buffat, Xavier (CERN) ; Carideo, Emanuela (CERN) ; Dascalu, Titus-Stefan (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Oeftiger, Adrian (CERN) ; Salvant, Benoit (CERN) ; Valuch, Daniel (CERN)
This report summarises the results of MD3308 on the measurement of the instability rise time as a function of chromaticity in the LHC. [...]
CERN-ACC-NOTE-2020-0034.
- 2020. - 8 p.
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MD1446 –β∗–Reach: Impedance Contribution of Primary Collimators / Mereghetti, Alessio (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Biancacci, Nicolo (CERN) ; Fiascaris, Maria (CERN) ; Metral, Elias (CERN) ; Redaelli, Stefano (CERN) ; Salvant, Benoit (CERN) ; Soderen, Martin (CERN)
This report summarizes the results of MD1446 on impedance measurements of single primary collimators. [...]
CERN-ACC-NOTE-2020-0020.
- 2020. - 8 p.
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