Influence of an electric field on self-diffraction of light waves in titanosillenite
A titanosillenite crystal is used as an example to demonstrate a strong dependence of the characteristics of energy exchange by self-diffraction of light in photorefractive crystals on the initial polarizations of the interacting waves and on the presence of an external electric field.
In support of the TCV experimental campaign aiming at studying H-mode plasmas with snowﬂake (SF) divertor, free boundary equilibrium and stability studies were performed with the SPIDER and KINX codes. Due to the high ﬂexibility of plasma shaping capabilities of TCV, SF divertor conditions can be reached for various plasma geometries. However, at high plasma current some conﬁgurations require poloidal ﬁeld (PF) coil currents close to the machine limit. This is particularly important when the equilibrium sensitivity to the edge pedestal proﬁles, which is higher than for standard X-point conﬁgurations, is taken into account. That is why the conﬁguration optimization should also include the proﬁle sensitivity study when planning the shot scenario.