Abstract: A method for releasing a drill core from a drill bit of a core drilling device, with an intuitive movement being recognized and used as a trigger for a shaking process for the drill core. The intuitive movement may be for example a shaking movement of the core drilling device. A core drilling device for carrying out the proposed method is also provided. The core drilling device preferably includes a sensor system for detecting the intuitive movement of the core drilling device, while the sensor system may for example comprise a gyro sensor.

Abstract: A treatment chamber (1) evacuable by vacuum pumps (13,13') has a mounting (26,26', . . .) bearing the hollow body (4) in the treatment chamber (1), and a line (9,9') for the admission of a process gas into the treatment chamber (1). A microwave conductor (20,20' . . .) is connected with a generator (19,19' . . .) for igniting a plasma in the area of channels formed by a sheet-metal shroud (2,2') matching the configuration of the hollow body (4). A closure (7,7') is provided through which the filler opening (6, 6') of the hollow body (4) can be closed pressure-tight, and a line (9,9') for the process gas passes through the closure.