Experimental investigation to overcome the ramp-rate limitation of CICC superconducting magnets

Sangkwon Jeong, Seokho Kim, Tae Kuk Ko

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

RRL (Ramp-rate limitation) is a phenomenon in which a magnet quenches before it reaches its apparent critical current. This paper is an experimental investigation not about the detailed influence of various parameters on the ramp-rate limitation, but about the general methodology to overcome it. A CICC (Cable-In-Conduit Conductor) superconducting magnet has been made of three-strand NbTi triplet. The magnet produced a maximum 3.6 T/s ramp-rate at the inner most region. The temperature of the supercritical helium coolant was deliberately raised to investigate RRL-related quench. The main purpose of the experiment was to study RRL phenomena at the first and consecutive ramp-ups. If quench is avoided during the first ramp-up, the consecutive ramp-ups of the magnet have much higher resistance against the RRL. This paper describes several experimental observations of several an interesting hysteretic characteristics of RRL.

Original languageEnglish
Pages (from-to)1689-1692
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 II
DOIs
Publication statusPublished - 2001 Mar 1
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sep 172000 Sep 22

Fingerprint

Superconducting magnets
superconducting magnets
ramps
cables
Magnets
Cables
conductors
Helium
Critical currents
Coolants
magnets
Experiments
coolants
high resistance
Temperature
strands
critical current
helium
methodology

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "Experimental investigation to overcome the ramp-rate limitation of CICC superconducting magnets",
abstract = "RRL (Ramp-rate limitation) is a phenomenon in which a magnet quenches before it reaches its apparent critical current. This paper is an experimental investigation not about the detailed influence of various parameters on the ramp-rate limitation, but about the general methodology to overcome it. A CICC (Cable-In-Conduit Conductor) superconducting magnet has been made of three-strand NbTi triplet. The magnet produced a maximum 3.6 T/s ramp-rate at the inner most region. The temperature of the supercritical helium coolant was deliberately raised to investigate RRL-related quench. The main purpose of the experiment was to study RRL phenomena at the first and consecutive ramp-ups. If quench is avoided during the first ramp-up, the consecutive ramp-ups of the magnet have much higher resistance against the RRL. This paper describes several experimental observations of several an interesting hysteretic characteristics of RRL.",
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Experimental investigation to overcome the ramp-rate limitation of CICC superconducting magnets. / Jeong, Sangkwon; Kim, Seokho; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 II, 01.03.2001, p. 1689-1692.

Research output: Contribution to journalConference article

TY - JOUR

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AU - Jeong, Sangkwon

AU - Kim, Seokho

AU - Ko, Tae Kuk

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N2 - RRL (Ramp-rate limitation) is a phenomenon in which a magnet quenches before it reaches its apparent critical current. This paper is an experimental investigation not about the detailed influence of various parameters on the ramp-rate limitation, but about the general methodology to overcome it. A CICC (Cable-In-Conduit Conductor) superconducting magnet has been made of three-strand NbTi triplet. The magnet produced a maximum 3.6 T/s ramp-rate at the inner most region. The temperature of the supercritical helium coolant was deliberately raised to investigate RRL-related quench. The main purpose of the experiment was to study RRL phenomena at the first and consecutive ramp-ups. If quench is avoided during the first ramp-up, the consecutive ramp-ups of the magnet have much higher resistance against the RRL. This paper describes several experimental observations of several an interesting hysteretic characteristics of RRL.

AB - RRL (Ramp-rate limitation) is a phenomenon in which a magnet quenches before it reaches its apparent critical current. This paper is an experimental investigation not about the detailed influence of various parameters on the ramp-rate limitation, but about the general methodology to overcome it. A CICC (Cable-In-Conduit Conductor) superconducting magnet has been made of three-strand NbTi triplet. The magnet produced a maximum 3.6 T/s ramp-rate at the inner most region. The temperature of the supercritical helium coolant was deliberately raised to investigate RRL-related quench. The main purpose of the experiment was to study RRL phenomena at the first and consecutive ramp-ups. If quench is avoided during the first ramp-up, the consecutive ramp-ups of the magnet have much higher resistance against the RRL. This paper describes several experimental observations of several an interesting hysteretic characteristics of RRL.

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