Cargando…
PcInterlock: Implementation and Operational Experience with the Optics Interlock
In 2016 the luminosity reach of the LHC was increased by reducing the β-function in the main collision points below the design value to β∗ = 40 cm. This was possible due to a review of the margins in the collimation hierarchy followed by the implementation of additional measures to ensure the phase...
Autores principales: | , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2018
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2320154 |
_version_ | 1780958473603776512 |
---|---|
author | Schaumann, Michaela Calia, Andrea Fuchsberger, Kajetan Wenninger, Jorg |
author_facet | Schaumann, Michaela Calia, Andrea Fuchsberger, Kajetan Wenninger, Jorg |
author_sort | Schaumann, Michaela |
collection | CERN |
description | In 2016 the luminosity reach of the LHC was increased by reducing the β-function in the main collision points below the design value to β∗ = 40 cm. This was possible due to a review of the margins in the collimation hierarchy followed by the implementation of additional measures to ensure the phase advance in defined ranges around the circumference. The risk of damaging the triplet or the tertiary collimators (TCTs) close to the interaction points in the event of an asynchronous beam dump is minimized by including margins in the collimation hierarchy, which define the β∗-reach. By guaranteeing the phase advance within an acceptable tolerance between the beam dump kicker and the TCTs, those margins can be reduced and operation at lower β∗ becomes possible. A new interlock system on the quadrupole magnet currents was put in place to safeguard the stability of the phase advance. This note describes the technical implementation of this power-converter interlock (PcInterlock) and the strategies used to derive appropriated tolerances to allow sufficient protection without risking false beam dump triggers. The experience with the new PcInterlock settings in 2016-18 are discussed. |
id | cern-2320154 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
spelling | cern-23201542019-10-15T18:30:42Zhttp://cds.cern.ch/record/2320154engSchaumann, MichaelaCalia, AndreaFuchsberger, KajetanWenninger, JorgPcInterlock: Implementation and Operational Experience with the Optics InterlockAccelerators and Storage RingsIn 2016 the luminosity reach of the LHC was increased by reducing the β-function in the main collision points below the design value to β∗ = 40 cm. This was possible due to a review of the margins in the collimation hierarchy followed by the implementation of additional measures to ensure the phase advance in defined ranges around the circumference. The risk of damaging the triplet or the tertiary collimators (TCTs) close to the interaction points in the event of an asynchronous beam dump is minimized by including margins in the collimation hierarchy, which define the β∗-reach. By guaranteeing the phase advance within an acceptable tolerance between the beam dump kicker and the TCTs, those margins can be reduced and operation at lower β∗ becomes possible. A new interlock system on the quadrupole magnet currents was put in place to safeguard the stability of the phase advance. This note describes the technical implementation of this power-converter interlock (PcInterlock) and the strategies used to derive appropriated tolerances to allow sufficient protection without risking false beam dump triggers. The experience with the new PcInterlock settings in 2016-18 are discussed.CERN-BE-2018-001oai:cds.cern.ch:23201542018-05-24 |
spellingShingle | Accelerators and Storage Rings Schaumann, Michaela Calia, Andrea Fuchsberger, Kajetan Wenninger, Jorg PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title | PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title_full | PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title_fullStr | PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title_full_unstemmed | PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title_short | PcInterlock: Implementation and Operational Experience with the Optics Interlock |
title_sort | pcinterlock: implementation and operational experience with the optics interlock |
topic | Accelerators and Storage Rings |
url | http://cds.cern.ch/record/2320154 |
work_keys_str_mv | AT schaumannmichaela pcinterlockimplementationandoperationalexperiencewiththeopticsinterlock AT caliaandrea pcinterlockimplementationandoperationalexperiencewiththeopticsinterlock AT fuchsbergerkajetan pcinterlockimplementationandoperationalexperiencewiththeopticsinterlock AT wenningerjorg pcinterlockimplementationandoperationalexperiencewiththeopticsinterlock |