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Title: Tests of by-pass diodes at cryogenic temperatures for the KATRIN magnets

The Karlsruhe Tritium Neutrino experiment (KATRIN) requires a series of superconducting solenoid magnets for guiding beta-electrons from the source to the detector. By-pass diodes will operate at liquid helium temperatures to protect the superconducting magnets and bus bars in case of quenches. The operation conditions of the by-pass diodes depend on the different magnet systems of KATRIN. Therefore, different diode stacks are designed with adequate copper heat sinks assuming adiabatic conditions. The by-pass diode stacks have been submitted to cold tests both at liquid nitrogen and liquid helium temperatures for checking operation conditions. This report presents the test set up and first results of the diode characteristics at 300 K and 77 K, as well as of endurance tests of the diode stacks at constant current load at 77 K and 4.2 K.
Authors:
 [1] ; ; ; ;  [2] ;  [3]
  1. Karlsruhe Institute of Technology, ITEP, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen (Germany)
  2. Karlsruhe Institute of Technology, IKP, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen (Germany)
  3. CERN, TE-MPE, 1211 Geneva 23 (Switzerland)
Publication Date:
OSTI Identifier:
22264042
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1574; 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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER; ELECTRONS; HELIUM; LIQUIDS; NITROGEN; SOLENOIDS; SUPERCONDUCTING MAGNETS; TRITIUM