Abstract
We study a high magnetic field generation using HTS bulk magnets activated by pulsed-field magnetization (PFM) with the goal of their industrial application. In our previous study, a single-stage GM-type refrigerator and a dual-stage GM-type refrigerator with air-cooled-type compressor and a Stirling refrigerator were used for cooling an HTS bulk aiming at simplifying the bulk magnet system. Now, we developed a new bulk magnet system using a dual-stage GM-type refrigerator with a high cooling capacity of 12 W at 20 K aiming to enhance a trapped field by improving a cooling ability. When a GdBCO bulk 60 mm in diameter and 20 mm thick was cooled from the room temperature to the lowest, the lowest temperature was 13.3 K at the sample stage and 45.5 K at the bulk surface for 3.5 hours. When a single pulsed field was applied with varying the amplitude and temperature, the maximum flux densities of 3.59 T on the bulk surface and 2.34 T at the pole surface, and the total magnetic flux of 2.48 mWb were achieved at 20 K.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Applied Superconductivity |
| DOIs | |
| Publication status | Accepted/In press - 2018 Aug 13 |
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Keywords
- Cooling
- cooling capacity
- HTS bulk magnet
- magnetic field distribution
- Magnetic flux
- Magnetic separation
- pulsed-field magnetization
- refrigerator
- Refrigerators
- Superconducting magnets
- Temperature measurement
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Magnetizing performance evaluation of HTS bulk magnet using a 12 K refrigerator with high cooling capacity. / Yokoyama, Kazuya; Katsuki, Atsushi; Miura, Atsuro; Oka, Tetsuo.
In: IEEE Transactions on Applied Superconductivity, 13.08.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Magnetizing performance evaluation of HTS bulk magnet using a 12 K refrigerator with high cooling capacity
AU - Yokoyama, Kazuya
AU - Katsuki, Atsushi
AU - Miura, Atsuro
AU - Oka, Tetsuo
PY - 2018/8/13
Y1 - 2018/8/13
N2 - We study a high magnetic field generation using HTS bulk magnets activated by pulsed-field magnetization (PFM) with the goal of their industrial application. In our previous study, a single-stage GM-type refrigerator and a dual-stage GM-type refrigerator with air-cooled-type compressor and a Stirling refrigerator were used for cooling an HTS bulk aiming at simplifying the bulk magnet system. Now, we developed a new bulk magnet system using a dual-stage GM-type refrigerator with a high cooling capacity of 12 W at 20 K aiming to enhance a trapped field by improving a cooling ability. When a GdBCO bulk 60 mm in diameter and 20 mm thick was cooled from the room temperature to the lowest, the lowest temperature was 13.3 K at the sample stage and 45.5 K at the bulk surface for 3.5 hours. When a single pulsed field was applied with varying the amplitude and temperature, the maximum flux densities of 3.59 T on the bulk surface and 2.34 T at the pole surface, and the total magnetic flux of 2.48 mWb were achieved at 20 K.
AB - We study a high magnetic field generation using HTS bulk magnets activated by pulsed-field magnetization (PFM) with the goal of their industrial application. In our previous study, a single-stage GM-type refrigerator and a dual-stage GM-type refrigerator with air-cooled-type compressor and a Stirling refrigerator were used for cooling an HTS bulk aiming at simplifying the bulk magnet system. Now, we developed a new bulk magnet system using a dual-stage GM-type refrigerator with a high cooling capacity of 12 W at 20 K aiming to enhance a trapped field by improving a cooling ability. When a GdBCO bulk 60 mm in diameter and 20 mm thick was cooled from the room temperature to the lowest, the lowest temperature was 13.3 K at the sample stage and 45.5 K at the bulk surface for 3.5 hours. When a single pulsed field was applied with varying the amplitude and temperature, the maximum flux densities of 3.59 T on the bulk surface and 2.34 T at the pole surface, and the total magnetic flux of 2.48 mWb were achieved at 20 K.
KW - Cooling
KW - cooling capacity
KW - HTS bulk magnet
KW - magnetic field distribution
KW - Magnetic flux
KW - Magnetic separation
KW - pulsed-field magnetization
KW - refrigerator
KW - Refrigerators
KW - Superconducting magnets
KW - Temperature measurement
UR - http://www.scopus.com/inward/record.url?scp=85051657485&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051657485&partnerID=8YFLogxK
U2 - 10.1109/TASC.2018.2865461
DO - 10.1109/TASC.2018.2865461
M3 - Article
AN - SCOPUS:85051657485
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
ER -