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Title: The 100 kA current leads for a superconducting transmission line magnet

A pair of current leads to power a transmission line magnet cooled at liquid helium temperature has been designed and developed at Fermilab. The leads designed to carry 100 kA dc current. Each lead consists of a warm end, heat exchange section and a cold end. The warm end is a half moon plate and cylinder brazed together. The heat exchange section is made of 202 copper rods arranged in a staggered pattern. Each rod is 6.35 mm in diameter and 1650 mm in length. The rods were soft-soldered into 12.7 mm deep holes at both warm and cold ends. The helium gas flow, guided by anodized aluminum baffles along the lead length, allows for a relatively high heat transfer coefficient between the current carrying rods and cooling helium gas. As a result the current leads were successfully tested with a ramping current of up to 104 kA. The current lead design, assembly work and the test results are presented.
Authors:
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Publication Date:
OSTI Identifier:
879074
Report Number(s):
FERMILAB-CONF-05-394-TD
TRN: US200623%%310
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Journal Name: IEEE Trans.Appl.Supercond.16:457-460,2006; Conference: Presented at MT-19: 19th International Conference on Magnet Technology, Genoa, Italy, 18-23 Sep 2005
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 43 PARTICLE ACCELERATORS; ALUMINIUM; BAFFLES; COPPER; DESIGN; FERMILAB; GAS FLOW; HEAT TRANSFER; HELIUM; MAGNETS; POWER TRANSMISSION LINES Accelerators