United States of America As Represented by the Secretary of the Air Force

Peter Bletzinger

Siegfried H Hasinger

Richard Lc Wu

Benjamin Sarka

Alan Garscadden

William C Lanter

Robert A Olson

An ionizing discharge device operating arrangement wherein initiation of discharges in for example a dielectric barrier discharge device is accomplished by a short circuit shunting of the charged electrodes of the device. A cycle of slow charging of the device inter-electrode capacitance followed by a high-speed electrode-shunting event is used for continuing operation of the device. In this operating cycle energy storage is accomplished by the inter-electrode capacitance of the device without causing ionization by way of a controlled rate of capacitance charging accomplished without assistance of additional storage elements. Desirable fast pulse rise-time energization characteristics are achieved in the dielectric barrier discharge device by way of using a fast, preferably electronic, switch in the shunting operation and maintaining the discharge in a circuit of relatively low inductance and minimal lead lengths.

Shunt-induced high frequency excitation of dielectric barrier discharges

A new method for ion beam deposition of diamond-like carbon coatings onto a variety of substrates is described. A high power, radio frequency excited-inductively coupled ion gun directs a beam of carbon and hydrogen ions at a substrate inside an ultra vacuum deposition chamber. A four axis scanner is used for coating large and nonplaner substrates. A quadrupole mass spectrometer is mounted inside the deposition chamber for real time monitoring of ion composition. The disclosed method is particularly effective for coating zinc sulfide and zinc selenide infrared windows.

Process for large area deposition of diamond-like carbon films

A closed cycle, high repetition pulsed laser having a laser flow channel with an annular flow return surrounding the laser flow channel. Ultra high vacuum components and low out-gassing materials are used in the device. An externally driven axial flow fan is used for gas recirculation. A thyratron-switched low-inductance energy storage capacitor is used to provide a transverse discharge between profiled electrodes in the laser cavity.

Growing community of inventors

Fairborn, OH, United States of America

Peter Bletzinger