  We demonstrate, for the time, the operation of a bubble-assisted Liquid Hole
Multiplier (LHM) in liquid argon. The LHM, sensitive to both radiation-induced
ionization electrons and primary scintillation photons, consists of a
perforated electrode immersed in the noble liquid, with a stable gas-bubble
trapped underneath. Electrons deposited in the liquid or scintillation-induced
photoelectrons emitted from a photocathode on the electrode's surface, are
collected into the holes; after crossing the liquid-gas interface, they induce
electroluminescence within the bubble. After having validated in previous works
the LHM concept in liquid xenon, we provide here first preliminary results on
its operation in liquid argon. We demonstrate the bubble containment under a
Thick Gas Electron Multiplier (THGEM) electrode and provide detector response
to alpha particles, recorded with a SiPM - under electroluminescence and with
modest gas multiplication; the imaging capability is also demonstrated.
