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Title: Cryogenic performance of a conduction-cooling splittable quadrupole magnet for ILC cryomodules

A conduction-cooled splittable superconducting quadrupole magnet was designed and fabricated at Fermilab for use in cryomodules of the International Linear Collider (ILC) type, in which the magnet was to be assembled around the beam tube to avoid contaminating the ultraclean superconducting radio frequency cavity volume. This quadrupole was first tested in a liquid helium bath environment at Fermilab, where its quench and magnetic properties were characterized. Because the device is to be cooled by conduction when installed in cryomodules, a separate test with a conduction-cooled configuration was planned at KEK and Fermilab. The magnet was converted to a conduction-cooled configuration by adding conduction-cooling passages made of high-purity aluminum. Efforts to convert and refabricate the magnet into a cryostat equipped with a double-stage pulse-tube-type cryocooler began in 2011, and a thermal performance test, including a magnet excitation test of up to 30 A, was conducted at KEK. In this test, the magnet with the conduction-cooled configuration was successfully cooled to 4 K within 190 h, with an acceptable heat load of less than 1 W at 4 K. It was also confirmed that the conduction-cooled splittable superconducting quadrupole magnet was practical for use in ILC-type cryomodules.
Authors:
;  [1] ; ; ;  [2] ;  [3] ; ;  [4]
  1. High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  2. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)
  3. Argonne National Laboratory, Argonne, 9700 S. Cass Avenue, IL 60439 (United States)
  4. Toshiba Corporation Power Systems Company, 2-4 Suehiro-Cho, Tsurumi-Ku, Yokohama, Kanagawa 230-0045 (Japan)
Publication Date:
OSTI Identifier:
22263947
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1573; Journal Issue: 1; Conference: International cryogenic materials conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM; COOLING; CRYOSTATS; DESIGN; FERMILAB; HELIUM; LINEAR COLLIDERS; MAGNETIC PROPERTIES; MAGNETS