Gas ion laser - with long laser tube segment coated with resistive layer

摘要

In a gas ion laser with a capillary formed by an electrically conductive tube segment coated with an ion bombardment-resistant resistive layer, the novelty is that the tube segment length/internal radius ratio is greater than 5, and, in the plasma contacting region, the resistive layer has a mean surface resistivity (Pd) satisfying a mathematical relationship in which Pd is greater than or equal to the formula (I). In the formula VW (Z) (inV) = potential at tube wall VM (in V) = potential of tube segment VRO (in V) = potential at the cathode-side plasma edge in the tube segment region Z (in M) = cylinder coordinate in the tube axis direction w.r.t. the cathode-side end of the tube segment EZ (in V/M) = longitudinal field strength in the z-direction e (in A sec.) = elementary charge (1.602x19 power (-19) ipw (in S-1 m-2) = ionic current density M(in kg) = ionic mass (6.634x10 power (-26) for Ar) me (in kg) = electron mass (9.104x10-31) k(in J/K) =Boltzmann constant (1.381x10 power (-23) Te (in K) = electron temp. ADVANTAGE - Relatively long tube segment are used without significant energy loss via the laser tube.