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The String Shutdown Report: December 97 - March 98

The main reason for the shutdown was the installation of a tube containing a prototype auxiliary bus-bars cable. This tube runs in one of the beam tube apertures of the String from the front of MB1 to the rear of MB3 and is hydraulically connected to the cold mass of MB3. A ceramic leak tight feed-t...

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Detalles Bibliográficos
Autores principales: Casas-Cubillos, J, Cruikshank, P, Favre, G, Herzog, R, Jacquemod, A, Missiaen, D, Saban, R, Struik, M
Lenguaje:eng
Publicado: 1998
Materias:
Acceso en línea:http://cds.cern.ch/record/692053
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author Casas-Cubillos, J
Cruikshank, P
Favre, G
Herzog, R
Jacquemod, A
Missiaen, D
Saban, R
Struik, M
author_facet Casas-Cubillos, J
Cruikshank, P
Favre, G
Herzog, R
Jacquemod, A
Missiaen, D
Saban, R
Struik, M
author_sort Casas-Cubillos, J
collection CERN
description The main reason for the shutdown was the installation of a tube containing a prototype auxiliary bus-bars cable. This tube runs in one of the beam tube apertures of the String from the front of MB1 to the rear of MB3 and is hydraulically connected to the cold mass of MB3. A ceramic leak tight feed-through was installed, for the first time in operational conditions, to route the signal wires for the temperature sensors and the voltage taps out of the 1.9 K helium bath. Leaks in the beam-screen capillary had prevented the connection of the beam screens to the cooling circuit. The opportunity of t his shutdown was taken to install a cryogenically cooled beam-screen in the other aperture of MB3. In addition, the calibration of temperature and positioning sensors took place. The SRB had to be re moved to install the long tube and the lines carrying cryogens had to be cut, therefore a pressure test and a leak test had to be carried-out.
id cern-692053
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-6920532023-05-31T13:25:27Zhttp://cds.cern.ch/record/692053engCasas-Cubillos, JCruikshank, PFavre, GHerzog, RJacquemod, AMissiaen, DSaban, RStruik, MThe String Shutdown Report: December 97 - March 98Accelerators and Storage RingsThe main reason for the shutdown was the installation of a tube containing a prototype auxiliary bus-bars cable. This tube runs in one of the beam tube apertures of the String from the front of MB1 to the rear of MB3 and is hydraulically connected to the cold mass of MB3. A ceramic leak tight feed-through was installed, for the first time in operational conditions, to route the signal wires for the temperature sensors and the voltage taps out of the 1.9 K helium bath. Leaks in the beam-screen capillary had prevented the connection of the beam screens to the cooling circuit. The opportunity of t his shutdown was taken to install a cryogenically cooled beam-screen in the other aperture of MB3. In addition, the calibration of temperature and positioning sensors took place. The SRB had to be re moved to install the long tube and the lines carrying cryogens had to be cut, therefore a pressure test and a leak test had to be carried-out.LHC-PROJECT-NOTE-148oai:cds.cern.ch:6920531998-05-31
spellingShingle Accelerators and Storage Rings
Casas-Cubillos, J
Cruikshank, P
Favre, G
Herzog, R
Jacquemod, A
Missiaen, D
Saban, R
Struik, M
The String Shutdown Report: December 97 - March 98
title The String Shutdown Report: December 97 - March 98
title_full The String Shutdown Report: December 97 - March 98
title_fullStr The String Shutdown Report: December 97 - March 98
title_full_unstemmed The String Shutdown Report: December 97 - March 98
title_short The String Shutdown Report: December 97 - March 98
title_sort string shutdown report: december 97 - march 98
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/692053
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