The Cryostat and Cryogenic System for the Far Detector of the Long Based Neutrino Experiment (LBNE)
30-7-018 - Kjell Johnsen Auditorium (CERN)
30-7-018 - Kjell Johnsen Auditorium
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The Long-Baseline Neutrino Experiment (LBNE) intends to build a liquid argon (LAr) detector known as the Far Detector (FD) to support neutrino physics. The detector design is based on the use of membrane tank technology previously developed and used in commercial business for both storage and transport of liquefied natural gas (LNG). The FD will be built at the start of the next decade with operations commencing approximately 2024. The detector is planned to be composed of two membrane cryostats each having the approximate physical dimensions of 28.5 meters long, 15.6 meters wide and 16 meters high (7134 m3 volume). Each will contain 9.4 kton LAr mass. The FD cryostat will house Time Projection Chambers (TPCs) used for particle detection and be filled with liquid argon filtered to less than 200 parts per trillion (ppt oxygen equivalent) contamination levels in order that electrons drift through the fluid with a lifetime greater than 1.4 ms. In order to insure that membrane cryostat technology can be used within these requirements, Fermilab and the LBNE project have constructed and commissioned a prototype cryostat (~29 m3) referred to as the ‘35 Ton’, testing the thermal performance and the ability to achieve high purity levels. Fermilab contracted with Ishikawajima-Harima Heavy Industries Co., Ltd (IHI) for the design, materials and technical supervision of the cryostat construction done by Fermilab personnel. Fermilab engineers guided the design, installation, and testing of the supporting LAr and liquid nitrogen (LN2) cryogenic systems. This talk will focus on the performance and commissioning of the ’35 ton’ prototype as well as overview the proposed cryogenic and cryostat design for the future FD, including the design concept for supporting an additional 15155 m3 volume for future expansion of detector cryostat(s).
Speaker: Barry Norris, Fermilab
ATS Seminars Organisers: H. Burkhardt (BE), M. Modena (TE), T. Stora (EN)
Coffee / tea will be served after the seminar