The CERN cryogenic test facility for the ATLAS barrel toroid magnets

被引：6
|
作者：
Haug, F [1 ]
Cambon, A [1 ]
Delruelle, N [1 ]
Orlic, JP [1 ]
Passardi, G [1 ]
Tischhauser, J [1 ]
机构：
[1] CERN, CH-1211 Geneva 23, Switzerland
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2000年 / 10卷 / 01期
关键词：
LHC; ATLAS; Barel Torroid magnets; Cryogenic Test Facility; immersed liquid He pumps;
D O I：
10.1109/77.828529
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The superconducting magnet system of the ATLAS detector will consist of a central solenoid, two end-cap toroidal magnets (ECT) and the barrel toroid magnet (ET) made of eight coils symmetrically placed around the central axis of the detector. The magnets will be tested individually in a 5000 m2 experimental area prior to their final installation at an underground cavern of the LHC Collider. For the BT magnets, a dedicated cryogenic test facility has been designed which is currently under the construction and commissioning phase. A liquid nitrogen pre cooling unit and a 1200 W@4.5K refrigerator will allow flexible operating conditions via a rather complex distribution and transfer line system. Flow of two-phase helium for cooling the coils is provided by centrifugal pumps immersed in a saturated liquid helium bath. The integration of the pumps in an existing cryostat required the adoption of novel mechanical solutions. Tests conducted permitted the validation of the technical design of the cryostat and its instrumentation. The characteristics of one pump were measured and pressure rise of 300 mbar at nominal flow of 80 g/s confirmed the specifications.
引用
收藏
页码：1514 / 1517
页数：4
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