First experimental campaign on SMOLA helical mirror

Experimental evidence of the plasma flow suppression by the helical magnetic mirror is presented. Reported experiments were done during the first plasma campaign in the SMOLA helical mirror device at self-consistent floating potentials of all in-vessel electrodes and at minimal magnetic fields suitable for confinement regime. The experimental results are consistent with two main theory predictions for the helical mirror confinement: a reduction of the axial plasma flow and the inward particle pinch. The helical mirror technology can dramatically improve fusion reactor prospects of open magnetic configurations. (author)