| Página principal > Towards Ultra-Thin Detector Magnet Designs by Insulating Coil Windings With V$_2$0$_3$-Epoxy Composite |
| Article | |
| Title | Towards Ultra-Thin Detector Magnet Designs by Insulating Coil Windings With V$_2$0$_3$-Epoxy Composite |
| Author(s) | Vaskuri, Anna (CERN) ; Curé, Benoit (CERN) ; Dudarev, Alexey (CERN) ; Mentink, Matthias (CERN) ; Pfeiffer, Stephan (CERN) ; Teissandier, Benoit (CERN) |
| Publication | 2023 |
| Number of pages | 4 |
| In: | IEEE Trans. Appl. Supercond. 33 (2023) 1-4 |
| DOI | 10.1109/TASC.2023.3255161 |
| Subject category | Detectors and Experimental Techniques |
| Abstract | We have measured temperature dependent resistivity of two types of vanadium oxide (V 2 O 3 ) epoxy composites from 77 K to room temperature. Such a composite could be used as an insulating layer between the windings of a superconducting magnet. During a magnet quench, the composite is expected to change from insulating to metallic at approximately 150 K, re-distributing the current through the heated windings. Our measurement results show significantly different phase transition characteristics of the samples. A sample mixed using 99.7% pure V 2 O 3 powder with sharp edges in particles and an average equivalent circle diameter (ECD) of 4.5 μ m has a factor of 23 resistivity change and a sample mixed using 95% pure V 2 O 3 powder with round edges in particles and an average ECD of 70 μ m has a change of three orders of magnitude, respectively. Using V 2 O 3 -epoxy composite as an insulating layer between the coil windings might allow thinner detector magnet designs since the current and heat would spread more uniformly across the magnet during a quench. |
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