Preionizationd device, in particular for x-ray preionization in

Details Preionizationd device, in particular for x-ray preionization in Preionizationd device, in particular for x-ray preionization in

1990-10-22

1992-08-11

Scott, Jr., Leon

Coherent light generators

Particular pumping means

Electrical

372 38, 372 37, 372 57, H04S 3097

Patent

active

051386275

ABSTRACT:
A preinoization device, in particular for X-ray preionization in discharge-pumped gas lasers, especially excimer lasers, is connected to a pulse generating network of an excitation circuit for gas lasers. A high voltage pulse transformer has a primary winding connected between a storage capacitor and a high-voltage switch in the pulse generating network. The pulse transformer emits preionizing pulses on the secondary side that lead to the firing of the laser glow discharge for a preionizing device, in particular an X-ray tube. The pulse transformer is constructed for this purpose as a saturable magnetic inductor with at least one secondary winding. If the high voltage switch is closed, when the pulse transformer is unsaturated its primary winding has its maximum inductance, so that there will be a secondary side voltage pulse at this time because of the law of induction. After a pre-set delay or retardation time of 50-100 ns, for example, the core will be saturated, the inductance of the primary winding will drop rapidly, and the full current will flow within the inversion circuit, so that the full high voltage builds up on the laser electrodes in order to fire the glow discharge.

REFERENCES:
patent: 4611327 (1986-09-01), Clark et al.
patent: 4837773 (1989-06-01), Wakata et al.
patent: 4975921 (1990-12-01), Rothe

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