TJ-II:Searching for AEs suppression scenarios using off-axis ECCD: Difference between revisions

TJ-II:Searching for AEs suppression scenarios using off-axis ECCD (view source)

953 bytes added , 20 January 2022

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 In this particular case we intend to investigate the effect of
 off-axis ECCD at different plasma radius.
+== Experimental plan ==
+[[File:imagen1.png |thumb|right|300px| Figure 1. Heating scheme. ECH1 beam, used to induce current, is
+launched with two different power levels for gyrotron stability purposes]]
+Until now, only ECCD on-axis has been investigated. We will now try to modify the rotational transform profile by inducing ECCD off-axis with
+different levels of power at different plasma radius. The heating power set-up shown in figure 1 will allow
+us to investigate the effect of ECCD using different combinations of ECH1 beam power and ECCD efficiency.
+With this set-up, launching ECH2 power with <math>n_{||}=0</math> , only a small amount of ECCD current will be induced by the
+ECH1 beam during the ECRH phase while the larger amount of ECCD will be induced during the NBI phase by increasing the ECH1 beam power. For stability purposes ECH1 must be working at low power from the begginning of the shot until higher power is requested.
 == International or National funding project or entity ==