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Detailed IR aperture measurements

MD 1673 was carried out on October 5 2016, in order to investigate in more detail the available aperture in the LHC high-luminosity insertions at 6.5 TeV and β∗=40 cm. Previous aperture measurements in 2016 during commissioning had shown that the available aperture is at the edge of protection, and...

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Detalles Bibliográficos
Autores principales: Bruce, Roderik, De Maria, Riccardo, Garcia Morales, Hector, Giovannozzi, Massimo, Hermes, Pascal Dominik, Mirarchi, Daniele, Quaranta, Elena, Redaelli, Stefano, Rossi, Carlo, Skowronski, Piotr Krzysztof, Wretborn, Sven Joel
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:http://cds.cern.ch/record/2239260
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author Bruce, Roderik
De Maria, Riccardo
Garcia Morales, Hector
Giovannozzi, Massimo
Hermes, Pascal Dominik
Mirarchi, Daniele
Quaranta, Elena
Redaelli, Stefano
Rossi, Carlo
Skowronski, Piotr Krzysztof
Wretborn, Sven Joel
author_facet Bruce, Roderik
De Maria, Riccardo
Garcia Morales, Hector
Giovannozzi, Massimo
Hermes, Pascal Dominik
Mirarchi, Daniele
Quaranta, Elena
Redaelli, Stefano
Rossi, Carlo
Skowronski, Piotr Krzysztof
Wretborn, Sven Joel
author_sort Bruce, Roderik
collection CERN
description MD 1673 was carried out on October 5 2016, in order to investigate in more detail the available aperture in the LHC high-luminosity insertions at 6.5 TeV and β∗=40 cm. Previous aperture measurements in 2016 during commissioning had shown that the available aperture is at the edge of protection, and that the aperture bottleneck at β∗=40 cm in certain cases is found in the separation plane instead of in the crossing plane. Furthermore, the bottlenecks were consistently found in close to the upstream end of Q3 on the side of the incoming beam, and not in Q2 on the outgoing beam as expected from calculations. Therefore, this MD aimed at measuring IR1 and IR5 separately (at 6.5 TeV and β∗=40 cm, for 185 µrad half crossing angle), to further localize the bottlenecks longitudinally using newly installed BLMs, investigate the difference in aperture between Q2 and Q3, and to see if any aperture can be gained using special orbit bumps.
id cern-2239260
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
record_format invenio
spelling cern-22392602019-09-30T06:29:59Zhttp://cds.cern.ch/record/2239260engBruce, RoderikDe Maria, RiccardoGarcia Morales, HectorGiovannozzi, MassimoHermes, Pascal DominikMirarchi, DanieleQuaranta, ElenaRedaelli, StefanoRossi, CarloSkowronski, Piotr KrzysztofWretborn, Sven JoelDetailed IR aperture measurementsAccelerators and Storage RingsMD 1673 was carried out on October 5 2016, in order to investigate in more detail the available aperture in the LHC high-luminosity insertions at 6.5 TeV and β∗=40 cm. Previous aperture measurements in 2016 during commissioning had shown that the available aperture is at the edge of protection, and that the aperture bottleneck at β∗=40 cm in certain cases is found in the separation plane instead of in the crossing plane. Furthermore, the bottlenecks were consistently found in close to the upstream end of Q3 on the side of the incoming beam, and not in Q2 on the outgoing beam as expected from calculations. Therefore, this MD aimed at measuring IR1 and IR5 separately (at 6.5 TeV and β∗=40 cm, for 185 µrad half crossing angle), to further localize the bottlenecks longitudinally using newly installed BLMs, investigate the difference in aperture between Q2 and Q3, and to see if any aperture can be gained using special orbit bumps.CERN-ACC-NOTE-2016-0075oai:cds.cern.ch:22392602016-10-05
spellingShingle Accelerators and Storage Rings
Bruce, Roderik
De Maria, Riccardo
Garcia Morales, Hector
Giovannozzi, Massimo
Hermes, Pascal Dominik
Mirarchi, Daniele
Quaranta, Elena
Redaelli, Stefano
Rossi, Carlo
Skowronski, Piotr Krzysztof
Wretborn, Sven Joel
Detailed IR aperture measurements
title Detailed IR aperture measurements
title_full Detailed IR aperture measurements
title_fullStr Detailed IR aperture measurements
title_full_unstemmed Detailed IR aperture measurements
title_short Detailed IR aperture measurements
title_sort detailed ir aperture measurements
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/2239260
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