Speaker
Description
PICCOLO (PIC COde for LOw temperature plasma), a general-purpose suite code developed at CNR-ISTP-Bari in collaboration with ENEA-Frascati will be first presented. Two different simulation scenario will be shown, the first is the negative ion source SPIDER and the second the plasma-wall transition in the divertor region. Both simulations are two-dimensional in cartesian geometry. The plasma transport in the plane perpendicular to the magnetic filter field of SPIDER has been analyzed. It leads to important asymmetry and dis-honogeneity along the entrance of the extraction region [1,2]. Finally, PICCOLO has been used to self-consistently calculate the particle and heat flux along the single divertor monoblock taking into account the realistic geometry of the monoblock. The 2D domain extends along the toroidal direction y and the direction normal to an axisymmetric divertor z. The effects of the bulk collisions and of the electron surface emission (secondary and thermionic) has been analyzed. The ion impact energy and angle distribution is also calculate to better assess possible ion-induced erosion of the tungsten divertor wall.
[1] F. Taccogna, A. Panarese, A. De Tommaso, P. Minelli, F. Cichocki, Particle-in-Cell modeling of SPIDER negative ion source, ESCAMPIG XXVI, Brno, Czech Republic, July 9–13, 2024.
[2] F. Taccogna, P. Minelli, F. Cichocki, PICCOLO: a Particle-in-Cell code suite for low-temperature plasmas, XXXVI ICPIG, Aix-en-Provence, France, July 20-25, 2025.