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TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas: Difference between revisions
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TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas (view source)
Revision as of 12:28, 7 March 2018
, 7 March 2018→Description of required resources
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# Characterization of the current driven using only the transmission line QTL1, injecting on-axis and with <math>N_{\|}=\left\{-0.3, -0.15, 0.0, 0.15, 0.3\right\}</math>, simultaneously to the employment of QTL2 with <math>N_{\|}=0.0</math> on-axis for auxiliary heating the background plasma. Considering 2 discharges per value of <math>N_{\|}\ \Rightarrow</math> 10 discharges. | # Characterization of the current driven using only the transmission line QTL1, injecting on-axis and with <math>N_{\|}=\left\{-0.3, -0.15, 0.0, 0.15, 0.3\right\}</math>, simultaneously to the employment of QTL2 with <math>N_{\|}=0.0</math> on-axis for auxiliary heating the background plasma. Considering 2 discharges per value of <math>N_{\|}\ \Rightarrow</math> 10 discharges. | ||
# Characterization of the current driven using only the transmission line QTL2, injecting on-axis and with <math>N_{\|}=\left\{-0.3, -0.15, 0.0, 0.15, 0.3\right\}</math>, simultaneously to the employment of QTL1 with <math>N_{\|}=0.0</math> on-axis for auxiliary heating the background plasma. Considering 2 discharges per value of <math>N_{\|}\ \Rightarrow</math> 10 discharges. | # Characterization of the current driven using only the transmission line QTL2, injecting on-axis and with <math>N_{\|}=\left\{-0.3, -0.15, 0.0, 0.15, 0.3\right\}</math>, simultaneously to the employment of QTL1 with <math>N_{\|}=0.0</math> on-axis for auxiliary heating the background plasma. Considering 2 discharges per value of <math>N_{\|}\ \Rightarrow</math> 10 discharges. | ||
# Finally, for | # Finally, for large <math>N_{\|}</math> the partial loss of X-mode polarization and the presence of spurious O-mode is expected at the resonance layer. Then, the current induction and power absorption may be sub-obtimal, and a scan on the ellipticity of the beam polarization at its launching position is foreseen in order to correct this effect. 10 discharges needed. | ||
* The discharges should be sufficiently long and the electron collisionality sufficiently high to capture the exponential growth of the induced toroidal plasma current and estimate the asymptotic value of it and the L/R time. Thus, time pulses of 250 ms. are initially planned and densities as high as ECH conditions allow. | * The discharges should be sufficiently long and the electron collisionality sufficiently high to capture the exponential growth of the induced toroidal plasma current and estimate the asymptotic value of it and the L/R time. Thus, time pulses of 250 ms. are initially planned and densities as high as ECH conditions allow. | ||