The ATLAS IBL CO sub(2) cooling system

The ATLAS Pixel detector has been equipped with an extra pixel layer in the space obtained by a smaller radius beam pipe. This new pixel layer called the Insertable B-Layer (IBL) was installed in 2014 and is operational in the current ATLAS data taking. The IBL detector is cooled with evaporative CO...

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Bibliographic Details
Published in:Journal of instrumentation 2017-02, Vol.12, p.C02064-C02064
Main Authors: Verlaat, B, Ostrega, M, Zwalinski, L, Bortolin, C, Vogt, S, Godlewski, J, Crespo-Lopez, O, Overbeek, M Van, Blaszcyk, T
Format: Article
Language:English
Subjects:
Carbon dioxide
Cooling systems
Design engineering
Detectors
Evaporative
Instrumentation
Pixels
Radiation dosage
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Summary:The ATLAS Pixel detector has been equipped with an extra pixel layer in the space obtained by a smaller radius beam pipe. This new pixel layer called the Insertable B-Layer (IBL) was installed in 2014 and is operational in the current ATLAS data taking. The IBL detector is cooled with evaporative CO sub(2) and is the first of its kind in ATLAS. The ATLAS IBL CO sub(2) cooling system is designed for lower temperature operation (< -35 super(o) C) than the previous developed CO sub(2) cooling systems in High Energy Physics experiments. The cold temperatures are required to protect the pixel sensors for the expected high radiation dose received at an integrated luminosity of 550 fb super(1). This paper describes the design, development, construction and commissioning of the IBL CO sub(2) cooling system. It describes the challenges overcome and the important lessons learned for the development of future systems which are now under design for the Phase-II upgrade detectors.
ISSN:1748-0221
DOI:10.1088/1748-0221/12/02/C02064