| アイテムタイプ |
会議発表用資料 / Presentation(1) |
| 公開日 |
2025-10-07 |
| タイトル |
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|
タイトル |
Improvement of the quench detection system for the PF coils of JT-60SA |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6670 |
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資源タイプ |
conference poster |
| 著者 |
Sonoda Shogo
Murakami Haruyuki
Usui Katsutomi
Hatakeyama Shoichi
Hamada Kazuya
Davis Sam
Wanner Manfred
Tomarchio Valerio
Zani Louis
Phillips Guy
Novello Luca
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| 抄録 |
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内容記述 |
The JT-60SA Poloidal Field (PF) coils comprise four central solenoid modules (CS) and six Equilibrium Field (EF1-6) coils. Their quench detection (QD) system uses pickup coils integrated in the coils to cancel inductive voltages during current transients and to detect any resistive voltage from a quench. A low pass filter, which consists of a resistor and a capacitor, is reducing the noise before the signal is fed to the differential amplifier of the QD. During the individual energization test of the PF coils in August 2023, spike-shaped noise was observed by the QD voltage when current transients were applied to PF coil. This spike must be reduced to avoid false detection of quench.Following a circuit analysis of EF2 coil it was found that the spike noise was caused by a small difference of the time constant of the RC filter circuit and of the pickup coil. The reduction of spike noise was experimentally confirmed by adjusting the time constants by a variable capacitor or resistor in the RC filter. Now the PF quench detectors are being modified to allow adjustment of the RC filter ready for the next tokamak operation. |
| 会議概要（会議名, 開催地, 会期, 主催者等） |
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内容記述 |
17th European Conference on Applied Superconductivity |
| 発表年月日 |
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日付 |
2025-09-23 |
