Variable temperature total AC loss and stability characterization facility

Sastry Pamidi; Doan Nguyen; Guomin Zhang; David Knoll; Ulf Trociewitz; Justin Schwartz

doi:10.1109/TASC.2007.899038

Variable temperature total AC loss and stability characterization facility

Sastry Pamidi, Doan Nguyen, Guomin Zhang, David Knoll, Ulf Trociewitz, Justin Schwartz

College of Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (SciVal)

Abstract

The design of a versatile ac loss and stability characterization facility for high temperature superconducting materials suitable for variable temperature measurements is described. A non-metallic vessel inside a transverse field double-helix magnet acts as the measurement chamber. A cryocooler cools the samples to a target measurement temperature between 35 and 80 K. The facility is suitable for measurements on samples as long as 15 cm with ac transport current and ac background magnetic field, both at variable frequency. The facility allows for sample rotation to vary its orientation with respect to the magnetic field. Initial temperature measurements showed that the sample could be maintained at uniform temperature to ±0.5 K. AC loss measurements performed on a precursor setup, identical in concept, confirmed the suitability of the double-helix magnet design and cryocooler based cooling arrangement.

Original language	English (US)
Pages (from-to)	3179-3182
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899038
State	Published - Jun 2007

All Science Journal Classification (ASJC) codes

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

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10.1109/TASC.2007.899038

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title = "Variable temperature total AC loss and stability characterization facility",

abstract = "The design of a versatile ac loss and stability characterization facility for high temperature superconducting materials suitable for variable temperature measurements is described. A non-metallic vessel inside a transverse field double-helix magnet acts as the measurement chamber. A cryocooler cools the samples to a target measurement temperature between 35 and 80 K. The facility is suitable for measurements on samples as long as 15 cm with ac transport current and ac background magnetic field, both at variable frequency. The facility allows for sample rotation to vary its orientation with respect to the magnetic field. Initial temperature measurements showed that the sample could be maintained at uniform temperature to ±0.5 K. AC loss measurements performed on a precursor setup, identical in concept, confirmed the suitability of the double-helix magnet design and cryocooler based cooling arrangement.",

author = "Sastry Pamidi and Doan Nguyen and Guomin Zhang and David Knoll and Ulf Trociewitz and Justin Schwartz",

note = "Funding Information: Manuscript received August 26, 2006. This work was supported by the Office of Electricity Delivery and Energy Reliability, U.S. Department of Energy, Award DE-FG02-05CH11292. S. Pamidi, D. Nguyen, G. Zhang and D. Knoll are with the Center for Advanced Power Systems, Florida State University, Tallahassee, FL 32310 USA (e-mail: pamidi@caps.fsu.edu; nguyen@caps.fsu.edu). U. Trociewitz is with the National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310 USA. J. Schwartz is with the National High Magnetic Field Laboratory, Department of Mechanical Engineering, Florida State University, Tallahassee, FL 32310 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.899038",

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Variable temperature total AC loss and stability characterization facility

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