Abstract: A plasma ignition detection device for connecting to an impedance matching circuit for a plasma generation system is configured to process first time-variant measured values from a first predetermined location of the impedance matching circuit. An applied first reactive and/or active power is capable of being determined from the first time-variant measured values. The plasma ignition detection device is further configured to process second time-variant values associated with a second location of the impedance matching circuit, the second location being different to the first predetermined location. An applied second reactive and/or active power is capable of being determined from the second time-variant values.

Abstract: A process is disclosed for thermally obliterating biological tissues by laser radiation introduced into the tissue by means of an optical waveguide. The laser radiation is scattered by means associated with the radiation output surface of the optical waveguide. A biocompatible, medium to highly visquous liquid which does not substantially absorb the laser radiation but scatters it, is injected into the tissue, forming a scattering fluid deposit around the radiation output surface which is not separated from the tissue and which allows the tissue to be heated in a controlled manner.