The measurement of poloidal magnetic field in a Tokamak by the change of polarization of an electromagnetic wave

Diagnostics and control for the steady state and pulsed tokamak DEMO

“…Taking into account the experience gained so far, the technical specifications on the interferometry/polarimetry measurements are shown in table 9. ) [30,32]:…”

“…In the approximation of small effects ( < < < < W 1 and W 1 1 2 3 2 ), the Cotton-Mouton gives the line average plasma density (once the toroidal magnetic field is known). Table 10 reports the polarimetry quantities calculated using formulas (7)-(8) (first and second columns from the left) for the ITER and DEMO parameters, and the Faraday rotation and Cotton-Mouton resulting from the integration of the Stokes equations of the propagation of the beam polarization inside the plasma (third and fourth columns from the left) [30,32]. The quantities are calculated for a central vertical chord with radial coordinate R = R0 + a/3.…”

“…2 ) are not applicable for either the ITER or DEMO, so an exact evaluation is needed, which is carried out using the Stokes polarization propagation equations [30,32]. The values shown in table 10 are calculated including the relativistic corrections related to the plasma temperatures typical of the ITER and DEMO [31].…”

“…The values shown in table 10 are calculated including the relativistic corrections related to the plasma temperatures typical of the ITER and DEMO [31]. The theory derived in [32] was used.…”

Full Tomographic Reconstruction of 2D Vector Fields using Discrete Integral Data

“…Several applications of vector field tomography have been considered in the literature. These include: blood flow imaging [4,5]; fluid mesoscale velocity imaging in ocean acoustic tomography [6][7][8]; fluid-flow imaging [9][10][11][12][13][14][15][16]; electric field imaging in Kerr materials [17][18][19]; imaging of the component of the gradient of the refractive index field, which is transversal to the beam, in Schlieren tomography [14]; velocity field imaging of heavy particles in plasma physics [20]; density imaging in supersonic expansions and flames in beam deflection optical tomography [21]; non-destructive stress distribution imaging of transparent specimens in photoelasticity [22,23]; determination of temperature distributions and velocity vector fields in furnaces [24]; and magnetic field imaging in Tokamak in polarimetric tomography [25].…”