TY - JOUR
T1 - Calculation method for pulsed magnetic field energy supplied to Nb3Sn ITER CS conductors during SULTAN stability tests
AU - Bagni, T.
AU - Breschi, M.
AU - Jagga, S.
AU - Devred, A.
AU - Nijhuis, A.
N1 - Elsevier deal
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Cable-In-Conduit Conductors (CICCs) for the ITER Central Solenoid (CS) magnets are designed to operate in the presence of fast changing current and magnetic field during the plasma-operating scenario. For ITER, the AC loss of several types of Nb3Sn CICCs was experimentally tested, but only very limited experimental data is available for quantitative analysis of the minimum quench energy (MQE). In the SULTAN testing facility (Swiss Plasma Centre) few CS conductors were tested on MQE, but the magnetic field amplitude and ramp rate settings are far from the actual ITER operating conditions. Nevertheless, such tests are needed as a basis to calibrate and benchmark the codes that describe the quench behavior. Moreover, during the stability tests in Sultan, the temperature measurements show severe fluctuations, which can introduce a large error for the energy calculation. An interpretation is given for the temperature fluctuation and a procedure is proposed to significantly reduce the error in the pulsed energy calculation.
AB - Cable-In-Conduit Conductors (CICCs) for the ITER Central Solenoid (CS) magnets are designed to operate in the presence of fast changing current and magnetic field during the plasma-operating scenario. For ITER, the AC loss of several types of Nb3Sn CICCs was experimentally tested, but only very limited experimental data is available for quantitative analysis of the minimum quench energy (MQE). In the SULTAN testing facility (Swiss Plasma Centre) few CS conductors were tested on MQE, but the magnetic field amplitude and ramp rate settings are far from the actual ITER operating conditions. Nevertheless, such tests are needed as a basis to calibrate and benchmark the codes that describe the quench behavior. Moreover, during the stability tests in Sultan, the temperature measurements show severe fluctuations, which can introduce a large error for the energy calculation. An interpretation is given for the temperature fluctuation and a procedure is proposed to significantly reduce the error in the pulsed energy calculation.
KW - UT-Hybrid-D
KW - Energy calculation
KW - Fusion magnets
KW - Stability
KW - Cable-in-conduit conductors
UR - http://www.scopus.com/inward/record.url?scp=85067304741&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2019.05.043
DO - 10.1016/j.fusengdes.2019.05.043
M3 - Article
AN - SCOPUS:85067304741
SN - 0920-3796
VL - 147
JO - Fusion engineering and design
JF - Fusion engineering and design
M1 - 111224
ER -