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Title: A magnetically coupled quench detector for superconducting magnets

Abstract

This note describes a low voltage signal detector that is useful for detecting quenches or excessive lead voltages at superconducting magnets. It can also be used for other applications where it is needed to detect low level signals present on high voltage installations. The application of isolated operational amplifiers is often not practical for high voltage applications because of their limited input voltage rating, common mode rejection and sensitivity. The described detector can withstand 7.5 kV input to ground voltage. It has a typical common mode rejection of {minus}150 dB at 60 Hz and an input sensitivity better than 1 mV. The magnetically coupled quench detector assembly is very sensitive to extremely small (order of 1 {mu}Amp) current changes in the sense windings. The detector assembly can therefore also be referred to as a micro current detector.

Authors:
; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10120044
Report Number(s):
FNAL-TM-1870
ON: DE94006040; TRN: 94:002357
DOE Contract Number:
AC02-76CH03000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Dec 1993
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; SUPERCONDUCTING MAGNETS; QUENCHING; MEASURING METHODS; DESIGN; ELECTRONIC CIRCUITS; PERFORMANCE; MEASURING INSTRUMENTS; 430303; 665412; EXPERIMENTAL FACILITIES AND EQUIPMENT; SUPERCONDUCTING DEVICES

Citation Formats

Jaskierny, W., Kristalinski, A., and Visser, A.T.. A magnetically coupled quench detector for superconducting magnets. United States: N. p., 1993. Web. doi:10.2172/10120044.
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Jaskierny, W., Kristalinski, A., & Visser, A.T.. A magnetically coupled quench detector for superconducting magnets. United States. doi:10.2172/10120044.
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Jaskierny, W., Kristalinski, A., and Visser, A.T.. Wed . "A magnetically coupled quench detector for superconducting magnets". United States. doi:10.2172/10120044. https://www.osti.gov/servlets/purl/10120044.
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@article{osti_10120044,
title = {A magnetically coupled quench detector for superconducting magnets},
author = {Jaskierny, W. and Kristalinski, A. and Visser, A.T.},
abstractNote = {This note describes a low voltage signal detector that is useful for detecting quenches or excessive lead voltages at superconducting magnets. It can also be used for other applications where it is needed to detect low level signals present on high voltage installations. The application of isolated operational amplifiers is often not practical for high voltage applications because of their limited input voltage rating, common mode rejection and sensitivity. The described detector can withstand 7.5 kV input to ground voltage. It has a typical common mode rejection of {minus}150 dB at 60 Hz and an input sensitivity better than 1 mV. The magnetically coupled quench detector assembly is very sensitive to extremely small (order of 1 {mu}Amp) current changes in the sense windings. The detector assembly can therefore also be referred to as a micro current detector.},
doi = {10.2172/10120044},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 1993},
month = {Wed Dec 01 00:00:00 EST 1993}
}
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Technical Report:
View Technical Report
DOI:  10.2172/10120044
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