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Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN

A high liquid krypton purity level is essential for the NA62 calorimeter at CERN to ensure long lifetimes of the ionization electrons in the detector. A small time projection chamber (TPC) system was developed to enable the measurement of liquid krypton purity at the oxygen equivalent ppb level. Thi...

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Autores principales: Liberadzka-Porret, J, Koettig, T, Santandrea, D, Kriboo, R, Velghe, B, Bryman, D, Falaleev, V, Danielsson, H, Bremer, J
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1757-899X/1240/1/012046
http://cds.cern.ch/record/2839981
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author Liberadzka-Porret, J
Koettig, T
Santandrea, D
Kriboo, R
Velghe, B
Bryman, D
Falaleev, V
Danielsson, H
Bremer, J
author_facet Liberadzka-Porret, J
Koettig, T
Santandrea, D
Kriboo, R
Velghe, B
Bryman, D
Falaleev, V
Danielsson, H
Bremer, J
author_sort Liberadzka-Porret, J
collection CERN
description A high liquid krypton purity level is essential for the NA62 calorimeter at CERN to ensure long lifetimes of the ionization electrons in the detector. A small time projection chamber (TPC) system was developed to enable the measurement of liquid krypton purity at the oxygen equivalent ppb level. This paper describes the dedicated cryogenic setup and the procedures required to operate the purity monitor system, while guaranteeing the condensation of krypton at 119 K without freezing it at 115.8 K on the cryocooler-based heat exchanger. The focus is on the materials used, and the instrumentation and pressure safety equipment that allowed the bake-out and purging procedures to reach ppb levels of impurities in the two litre vessel containing the TPC. The setup was integrated in the NA62 experimental area and successfully tested with purified commercially obtained krypton.
id cern-2839981
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
record_format invenio
spelling cern-28399812022-11-09T23:37:12Zdoi:10.1088/1757-899X/1240/1/012046http://cds.cern.ch/record/2839981engLiberadzka-Porret, JKoettig, TSantandrea, DKriboo, RVelghe, BBryman, DFalaleev, VDanielsson, HBremer, JSmall scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERNAccelerators and Storage RingsA high liquid krypton purity level is essential for the NA62 calorimeter at CERN to ensure long lifetimes of the ionization electrons in the detector. A small time projection chamber (TPC) system was developed to enable the measurement of liquid krypton purity at the oxygen equivalent ppb level. This paper describes the dedicated cryogenic setup and the procedures required to operate the purity monitor system, while guaranteeing the condensation of krypton at 119 K without freezing it at 115.8 K on the cryocooler-based heat exchanger. The focus is on the materials used, and the instrumentation and pressure safety equipment that allowed the bake-out and purging procedures to reach ppb levels of impurities in the two litre vessel containing the TPC. The setup was integrated in the NA62 experimental area and successfully tested with purified commercially obtained krypton.oai:cds.cern.ch:28399812022
spellingShingle Accelerators and Storage Rings
Liberadzka-Porret, J
Koettig, T
Santandrea, D
Kriboo, R
Velghe, B
Bryman, D
Falaleev, V
Danielsson, H
Bremer, J
Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title_full Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title_fullStr Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title_full_unstemmed Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title_short Small scale time projection chamber setup to test the purity of liquid krypton from the NA62 experiment at CERN
title_sort small scale time projection chamber setup to test the purity of liquid krypton from the na62 experiment at cern
topic Accelerators and Storage Rings
url https://dx.doi.org/10.1088/1757-899X/1240/1/012046
http://cds.cern.ch/record/2839981
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