Performance of the Conduction-Cooled LDX Levitation Coil

P. C. Michael; J. H. Schultz; B. A. Smith; P. H. Titus; A. Radovinsky; A. Zhukovsky; K. P. Hwang; G. J. Naumovich; R. J. Camille

doi:10.1063/1.1774745

Performance of the Conduction-Cooled LDX Levitation Coil

P. C. Michael
, J. H. Schultz
, B. A. Smith
, P. H. Titus
, A. Radovinsky
, A. Zhukovsky
, K. P. Hwang
, G. J. Naumovich
, R. J. Camille

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

The Levitated Dipole Experiment (LDX) was developed to study plasma confinement in a dipole magnetic field. Plasma is confined in the magnetic field of a 680-kg Nb₃Sn Floating Coil (F-coil) that is electromagnetically supported at the center of a 5-m diameter by 3-m tall vacuum chamber. The Levitation Coil (L-coil) is a 2800-turn, double pancake winding that supports the weight of the F-coil and controls its vertical position within the vacuum chamber. The use of high-temperature superconductor (HTS) Bi-2223 for the L-coil minimizes the electrical and cooling power needed for levitation. The L-coil winding pack and support plate are suspended within the L-coil cryostat and cooled by conduction to a single-stage cryocooler rated for 25-W heat load at approximately 20 K. The coil current leads consist of conduction-cooled copper running from room temperature to 80 K and a pair of commercially-available, 150-A HTS leads. An automatically filled liquid-nitrogen reservoir provides cooling for the coil's radiation shield and for the leads' 80-K heat stations. This paper discusses the L-coil system design and its observed cryogenic performance.

Original language	English (US)
Title of host publication	Advances in Cryogenic Engineering
Subtitle of host publication	Transactions of the Cryogenic Engineering Conference - CEC
Editors	John Pfotenhauer, Steven Van Sciver, Albert Zeller, Jonathan Demko, Christopher Rey, John G. Weisend II, John Barclay, Michael DiPirro, Quan-Sheng Shu, Peter Kittel, Edward Daly, John R. Hull, Jennifer Lock, Joseph Waynert, Susan Breon, James Maddocks, John Zbasnik, Patrick J. Kelley, Arkadiy Klebaner
Publisher	American Institute of Physics Inc.
Pages	701-710
Number of pages	10
ISBN (Electronic)	0735401861
DOIs	https://doi.org/10.1063/1.1774745
State	Published - Jun 23 2004
Externally published	Yes
Event	2003 Cryogenic Engineering Conference, CEC 2003 - Anchorage, United States Duration: Sep 22 2003 → Sep 26 2003

Publication series

Name	AIP Conference Proceedings
Volume	710
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	2003 Cryogenic Engineering Conference, CEC 2003
Country/Territory	United States
City	Anchorage
Period	9/22/03 → 9/26/03

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Access to Document

10.1063/1.1774745

Cite this

Michael, P. C., Schultz, J. H., Smith, B. A., Titus, P. H., Radovinsky, A., Zhukovsky, A., Hwang, K. P., Naumovich, G. J., & Camille, R. J. (2004). Performance of the Conduction-Cooled LDX Levitation Coil. In J. Pfotenhauer, S. Van Sciver, A. Zeller, J. Demko, C. Rey, J. G. Weisend II, J. Barclay, M. DiPirro, Q.-S. Shu, P. Kittel, E. Daly, J. R. Hull, J. Lock, J. Waynert, S. Breon, J. Maddocks, J. Zbasnik, P. J. Kelley, & A. Klebaner (Eds.), Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC (pp. 701-710). (AIP Conference Proceedings; Vol. 710). American Institute of Physics Inc.. https://doi.org/10.1063/1.1774745

Michael, P. C. ; Schultz, J. H. ; Smith, B. A. et al. / Performance of the Conduction-Cooled LDX Levitation Coil. Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. editor / John Pfotenhauer ; Steven Van Sciver ; Albert Zeller ; Jonathan Demko ; Christopher Rey ; John G. Weisend II ; John Barclay ; Michael DiPirro ; Quan-Sheng Shu ; Peter Kittel ; Edward Daly ; John R. Hull ; Jennifer Lock ; Joseph Waynert ; Susan Breon ; James Maddocks ; John Zbasnik ; Patrick J. Kelley ; Arkadiy Klebaner. American Institute of Physics Inc., 2004. pp. 701-710 (AIP Conference Proceedings).

@inproceedings{8df9ddba1f104b399ee41eb47a77c311,

title = "Performance of the Conduction-Cooled LDX Levitation Coil",

abstract = "The Levitated Dipole Experiment (LDX) was developed to study plasma confinement in a dipole magnetic field. Plasma is confined in the magnetic field of a 680-kg Nb3Sn Floating Coil (F-coil) that is electromagnetically supported at the center of a 5-m diameter by 3-m tall vacuum chamber. The Levitation Coil (L-coil) is a 2800-turn, double pancake winding that supports the weight of the F-coil and controls its vertical position within the vacuum chamber. The use of high-temperature superconductor (HTS) Bi-2223 for the L-coil minimizes the electrical and cooling power needed for levitation. The L-coil winding pack and support plate are suspended within the L-coil cryostat and cooled by conduction to a single-stage cryocooler rated for 25-W heat load at approximately 20 K. The coil current leads consist of conduction-cooled copper running from room temperature to 80 K and a pair of commercially-available, 150-A HTS leads. An automatically filled liquid-nitrogen reservoir provides cooling for the coil's radiation shield and for the leads' 80-K heat stations. This paper discusses the L-coil system design and its observed cryogenic performance.",

author = "Michael, \{P. C.\} and Schultz, \{J. H.\} and Smith, \{B. A.\} and Titus, \{P. H.\} and A. Radovinsky and A. Zhukovsky and Hwang, \{K. P.\} and Naumovich, \{G. J.\} and Camille, \{R. J.\}",

note = "Publisher Copyright: {\textcopyright} 2004 American Institute of Physics.; 2003 Cryogenic Engineering Conference, CEC 2003 ; Conference date: 22-09-2003 Through 26-09-2003",

year = "2004",

month = jun,

day = "23",

doi = "10.1063/1.1774745",

language = "English (US)",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

pages = "701--710",

editor = "John Pfotenhauer and \{Van Sciver\}, Steven and Albert Zeller and Jonathan Demko and Christopher Rey and \{Weisend II\}, \{John G.\} and John Barclay and Michael DiPirro and Quan-Sheng Shu and Peter Kittel and Edward Daly and Hull, \{John R.\} and Jennifer Lock and Joseph Waynert and Susan Breon and James Maddocks and John Zbasnik and Kelley, \{Patrick J.\} and Arkadiy Klebaner",

booktitle = "Advances in Cryogenic Engineering",

}

Michael, PC, Schultz, JH, Smith, BA, Titus, PH, Radovinsky, A, Zhukovsky, A, Hwang, KP, Naumovich, GJ & Camille, RJ 2004, Performance of the Conduction-Cooled LDX Levitation Coil. in J Pfotenhauer, S Van Sciver, A Zeller, J Demko, C Rey, JG Weisend II, J Barclay, M DiPirro, Q-S Shu, P Kittel, E Daly, JR Hull, J Lock, J Waynert, S Breon, J Maddocks, J Zbasnik, PJ Kelley & A Klebaner (eds), Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. AIP Conference Proceedings, vol. 710, American Institute of Physics Inc., pp. 701-710, 2003 Cryogenic Engineering Conference, CEC 2003, Anchorage, United States, 9/22/03. https://doi.org/10.1063/1.1774745

Performance of the Conduction-Cooled LDX Levitation Coil. / Michael, P. C.; Schultz, J. H.; Smith, B. A. et al.
Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. ed. / John Pfotenhauer; Steven Van Sciver; Albert Zeller; Jonathan Demko; Christopher Rey; John G. Weisend II; John Barclay; Michael DiPirro; Quan-Sheng Shu; Peter Kittel; Edward Daly; John R. Hull; Jennifer Lock; Joseph Waynert; Susan Breon; James Maddocks; John Zbasnik; Patrick J. Kelley; Arkadiy Klebaner. American Institute of Physics Inc., 2004. p. 701-710 (AIP Conference Proceedings; Vol. 710).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Performance of the Conduction-Cooled LDX Levitation Coil

AU - Michael, P. C.

AU - Schultz, J. H.

AU - Smith, B. A.

AU - Titus, P. H.

AU - Radovinsky, A.

AU - Zhukovsky, A.

AU - Hwang, K. P.

AU - Naumovich, G. J.

AU - Camille, R. J.

PY - 2004/6/23

Y1 - 2004/6/23

N2 - The Levitated Dipole Experiment (LDX) was developed to study plasma confinement in a dipole magnetic field. Plasma is confined in the magnetic field of a 680-kg Nb3Sn Floating Coil (F-coil) that is electromagnetically supported at the center of a 5-m diameter by 3-m tall vacuum chamber. The Levitation Coil (L-coil) is a 2800-turn, double pancake winding that supports the weight of the F-coil and controls its vertical position within the vacuum chamber. The use of high-temperature superconductor (HTS) Bi-2223 for the L-coil minimizes the electrical and cooling power needed for levitation. The L-coil winding pack and support plate are suspended within the L-coil cryostat and cooled by conduction to a single-stage cryocooler rated for 25-W heat load at approximately 20 K. The coil current leads consist of conduction-cooled copper running from room temperature to 80 K and a pair of commercially-available, 150-A HTS leads. An automatically filled liquid-nitrogen reservoir provides cooling for the coil's radiation shield and for the leads' 80-K heat stations. This paper discusses the L-coil system design and its observed cryogenic performance.

AB - The Levitated Dipole Experiment (LDX) was developed to study plasma confinement in a dipole magnetic field. Plasma is confined in the magnetic field of a 680-kg Nb3Sn Floating Coil (F-coil) that is electromagnetically supported at the center of a 5-m diameter by 3-m tall vacuum chamber. The Levitation Coil (L-coil) is a 2800-turn, double pancake winding that supports the weight of the F-coil and controls its vertical position within the vacuum chamber. The use of high-temperature superconductor (HTS) Bi-2223 for the L-coil minimizes the electrical and cooling power needed for levitation. The L-coil winding pack and support plate are suspended within the L-coil cryostat and cooled by conduction to a single-stage cryocooler rated for 25-W heat load at approximately 20 K. The coil current leads consist of conduction-cooled copper running from room temperature to 80 K and a pair of commercially-available, 150-A HTS leads. An automatically filled liquid-nitrogen reservoir provides cooling for the coil's radiation shield and for the leads' 80-K heat stations. This paper discusses the L-coil system design and its observed cryogenic performance.

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U2 - 10.1063/1.1774745

DO - 10.1063/1.1774745

M3 - Conference contribution

AN - SCOPUS:85048239682

T3 - AIP Conference Proceedings

SP - 701

EP - 710

BT - Advances in Cryogenic Engineering

A2 - Pfotenhauer, John

A2 - Van Sciver, Steven

A2 - Zeller, Albert

A2 - Demko, Jonathan

A2 - Rey, Christopher

A2 - Weisend II, John G.

A2 - Barclay, John

A2 - DiPirro, Michael

A2 - Shu, Quan-Sheng

A2 - Kittel, Peter

A2 - Daly, Edward

A2 - Hull, John R.

A2 - Lock, Jennifer

A2 - Waynert, Joseph

A2 - Breon, Susan

A2 - Maddocks, James

A2 - Zbasnik, John

A2 - Kelley, Patrick J.

A2 - Klebaner, Arkadiy

PB - American Institute of Physics Inc.

T2 - 2003 Cryogenic Engineering Conference, CEC 2003

Y2 - 22 September 2003 through 26 September 2003

ER -

Michael PC, Schultz JH, Smith BA, Titus PH, Radovinsky A, Zhukovsky A et al. Performance of the Conduction-Cooled LDX Levitation Coil. In Pfotenhauer J, Van Sciver S, Zeller A, Demko J, Rey C, Weisend II JG, Barclay J, DiPirro M, Shu QS, Kittel P, Daly E, Hull JR, Lock J, Waynert J, Breon S, Maddocks J, Zbasnik J, Kelley PJ, Klebaner A, editors, Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. American Institute of Physics Inc. 2004. p. 701-710. (AIP Conference Proceedings). doi: 10.1063/1.1774745

Performance of the Conduction-Cooled LDX Levitation Coil

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