6 Khz and above gas discharge laser system

A high pulse repetition rate gas discharge laser system pulse power system magnetic reactor comprising:

• a housing comprising a core containing compartment between an inner wall of the housing, an outer wall and a bottom wall of the housing;
• a cooling mechanism operative to withdraw heat from the at least one of the inner wall, outer wall and bottom of the housing;
• at least one two magnetic cores contained within the core containing compartment each respective core being wound on a mandrel contained within the core containing compartment;
• a cooling fin disposed between each of the at least two magnetic cores;
• a thermal conductivity enhancement mechanism intermediate at least one of each respective cooling fin and each respective core and a respective one of the inner wall, the outer wall or the bottom wall, the thermal conductivity enhancement mechanism comprising a band comprising a plurality of torsion spring or leaf spring elements each in contact with the respective one of the cooling fin and/or core and the respective inner wall, outer wall or bottom wall between which it is intermediate.

A high pulse repetition rate gas discharge laser system comprising:

• a master oscillator comprising:
• a chamber;
• a first pair of electrodes contained within the chamber defining a first discharge region between the first pair of electrodes;
• a second pair of electrodes contained within the chamber defining a second discharge region between the first pair of electrodes;
• a pulsed power system providing charging voltage in parallel to the first pair of electrodes at a pulse repetition rate and to tie second pair of electrodes at the pulse repetition rate alternating between the first pair of electrodes and the second pair of electrodes;
• a first amplifier laser receiving seed laser pulses at the pulse repetition rate generated in the first discharge region;
• a second amplifier laser receiving seed laser pulses at the pulse repetition rate generated in the second discharge region.

A high repetition rate gas discharge laser system comprising:

• a gas discharge chamber;
• a hot chamber output window heated by the operation of the gas discharge laser chamber;
• an output laser light pulse beam path enclosure downstream of the hot chamber window and comprising an ambient temperature window;
• a cooling mechanism cooling the beam path enclosure intermediate the output window and the ambient window.