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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...
Autores principales: | , , , , , , , , , , |
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Lenguaje: | eng |
Publicado: |
2016
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2239260 |
_version_ | 1780952964505010176 |
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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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