A solid-nitrogen cooled Nb3Sn NMR magnet operating in the range 8-10 K

Yukikazu Iwasa; Roger Wheatley; Juan Bascuñán; Benjamin Haid; Haigun Lee

doi:10.1109/TASC.2003.812851

A solid-nitrogen cooled Nb₃Sn NMR magnet operating in the range 8-10 K

Yukikazu Iwasa, Roger Wheatley, Juan Bascuñán, Benjamin Haid, Haigun Lee

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

Abstract

This paper presents a reference design of a solid-nitrogen cooled 300-MHz/25 mm Nb₃Sn NMR magnet based on a novel design/operation concept. The magnet operates in the temperature range 8-10 K with its cryocooler thermally decoupled from the magnet and idled. A mass of solid nitrogen in thermal contact with the magnet prolongs the magnet warm-up time to 17 h, during which NMR measurement may be performed under a quiet environment free of the cryocooler's microphonics. At 10 K, the magnet is re-coupled to the cryocooler for recooling to 8 K and ready for another 17-h measurement.

Original language	English
Pages (from-to)	1636-1639
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2 II
DOIs	https://doi.org/10.1109/TASC.2003.812851
Publication status	Published - 2003 Jun
Externally published	Yes
Event	2002 Applied Superconductivity Conference - Houston, TX, United States Duration: 2002 Aug 4 → 2002 Aug 9

Keywords

Cryocooler-decoupled operation of a superconducting magnet
Solid neon
Solid nitrogen

ASJC Scopus subject areas

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

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@article{be31f20f80d54690a091168a5f2f8fcc,

title = "A solid-nitrogen cooled Nb3Sn NMR magnet operating in the range 8-10 K",

abstract = "This paper presents a reference design of a solid-nitrogen cooled 300-MHz/25 mm Nb3Sn NMR magnet based on a novel design/operation concept. The magnet operates in the temperature range 8-10 K with its cryocooler thermally decoupled from the magnet and idled. A mass of solid nitrogen in thermal contact with the magnet prolongs the magnet warm-up time to 17 h, during which NMR measurement may be performed under a quiet environment free of the cryocooler's microphonics. At 10 K, the magnet is re-coupled to the cryocooler for recooling to 8 K and ready for another 17-h measurement.",

keywords = "Cryocooler-decoupled operation of a superconducting magnet, Solid neon, Solid nitrogen",

author = "Yukikazu Iwasa and Roger Wheatley and Juan Bascu{\~n}{\'a}n and Benjamin Haid and Haigun Lee",

note = "Funding Information: Manuscript received August 5, 2002. This work was supported by the NIH National Institute for Research Resources. Y. Iwasa and J. Bascu{\~n}{\'a}n are with the MIT Francis Bitter Magnet Laboratory (FBML), Cambridge, MA 02139-4208 USA (e-mail: iwasa@jokaku.mit.edu; bascunan@jokaku.mit.edu). R. Wheatley is with American Magnetics, Inc. (AMI), Oak Ridge, TN 37831-2509 USA (e-mail: rogerw@americanmagnetics.com). B. Haid is with the Lawrence Livermore National Laboratory, Livermore, CA 94551 USA (e-mail: haid1@llnl.gov). H. Lee is with FBML, Cambridge, MA 02139-4208 USA, and also with AMI (e-mail: hlee@jokaku.mit.edu). Digital Object Identifier 10.1109/TASC.2003.812851 Fig. 1. T (t) plots in the range 8–10 K each of 25-liter Cu, solid N Ne with 90 mW heat input.; 2002 Applied Superconductivity Conference ; Conference date: 04-08-2002 Through 09-08-2002",

year = "2003",

month = jun,

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volume = "13",

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T1 - A solid-nitrogen cooled Nb3Sn NMR magnet operating in the range 8-10 K

AU - Iwasa, Yukikazu

AU - Wheatley, Roger

AU - Bascuñán, Juan

AU - Haid, Benjamin

AU - Lee, Haigun

N1 - Funding Information: Manuscript received August 5, 2002. This work was supported by the NIH National Institute for Research Resources. Y. Iwasa and J. Bascuñán are with the MIT Francis Bitter Magnet Laboratory (FBML), Cambridge, MA 02139-4208 USA (e-mail: iwasa@jokaku.mit.edu; bascunan@jokaku.mit.edu). R. Wheatley is with American Magnetics, Inc. (AMI), Oak Ridge, TN 37831-2509 USA (e-mail: rogerw@americanmagnetics.com). B. Haid is with the Lawrence Livermore National Laboratory, Livermore, CA 94551 USA (e-mail: haid1@llnl.gov). H. Lee is with FBML, Cambridge, MA 02139-4208 USA, and also with AMI (e-mail: hlee@jokaku.mit.edu). Digital Object Identifier 10.1109/TASC.2003.812851 Fig. 1. T (t) plots in the range 8–10 K each of 25-liter Cu, solid N Ne with 90 mW heat input.

PY - 2003/6

Y1 - 2003/6

N2 - This paper presents a reference design of a solid-nitrogen cooled 300-MHz/25 mm Nb3Sn NMR magnet based on a novel design/operation concept. The magnet operates in the temperature range 8-10 K with its cryocooler thermally decoupled from the magnet and idled. A mass of solid nitrogen in thermal contact with the magnet prolongs the magnet warm-up time to 17 h, during which NMR measurement may be performed under a quiet environment free of the cryocooler's microphonics. At 10 K, the magnet is re-coupled to the cryocooler for recooling to 8 K and ready for another 17-h measurement.

AB - This paper presents a reference design of a solid-nitrogen cooled 300-MHz/25 mm Nb3Sn NMR magnet based on a novel design/operation concept. The magnet operates in the temperature range 8-10 K with its cryocooler thermally decoupled from the magnet and idled. A mass of solid nitrogen in thermal contact with the magnet prolongs the magnet warm-up time to 17 h, during which NMR measurement may be performed under a quiet environment free of the cryocooler's microphonics. At 10 K, the magnet is re-coupled to the cryocooler for recooling to 8 K and ready for another 17-h measurement.

KW - Cryocooler-decoupled operation of a superconducting magnet

KW - Solid neon

KW - Solid nitrogen

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DO - 10.1109/TASC.2003.812851

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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T2 - 2002 Applied Superconductivity Conference

Y2 - 4 August 2002 through 9 August 2002

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