[en] Basic experiments of turbulent heating are carried out on a non-isothermal, inhomogeneous and collisionless plasma in a uniform magnetic field. A high frequency drift wave (HFDW) with k sub(parallel) asymptoticaly equals k sub(perpenicular) not equals 0 and ω sub(pi) > ω >> Ω sub(i) is excited by the parallel electron current to the direction of the magnetic field. From detailed measurements of the ion energy distribution, it is found that ions are heated isotropically and nonlocally. The ion heating is always accompanied with the large amplitude HFDW turbulence. The ion heating rate can be well explained by the semi-phenomenological quasi-linear stochastic heating theory. (author)