Elektrische Gasentladungen

Sample Analysis with Miniaturized Plasmas

“…The reduced dimensions of the electrodes enable high-pressure operation according to the laws of similarity. 54 The discharge can be operated in the pressure range from 10 mbar up to 2 bar.…”

Period doubling cascade in glow discharges: Local versus global differential conductivity

“…We now introduce the simplest classical model for a glow discharge [27][28][29], solve it numerically, and confront its results with the predictions above. A discharge between Townsend and glow regime consists of a gas with Ohmic conductivity for the rare charged particles, electrostatic space charge effects and two ionization mechanisms, namely, impact ionization by accelerated electrons in the bulk of the discharge (the so-called ␣ process) and secondary emission from the cathode (the ␥ process).…”

Transition from Townsend to glow discharge: Subcritical, mixed, or supercritical characteristics

“…These patterns are due to the nonlinear gas discharge being coupled to the linearly responding semiconductor. In particular, a negative differential conductivity of the gas discharge in some region of the current-voltagecharacteristics is expected [13][14][15][16][17][18][19] to play a significant role in the spontaneous formation of patterns, quite like in nonlinear semiconductor devices [20]. Due to its geometry, modeling the system [10][11][12] as one-dimensional is a very good approximation, as long as this symmetry is not spontaneously broken by the intrinsic dynamics.…”

“…We recall this argument in Section III.B. The book [13] also gives an explicit expression for the coefficient c 2 ∝ α ′′ (E T ) in the expansion U (I) = U T + c 2 I 2 , however, without derivation or reference. Exactly the same statements can be found more than 60 years later in Raizer's much read textbook [21].…”