Raymond W Conrad

US Patent:

H4375, Feb 2, 1988

Filed:

Jun 15, 1987

Appl. No.:

7/062289

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01S 320
C09K 1106

US Classification:

372 53

Abstract:

A polydisperse aggregate of very small solid particles that form voids therebetween with a lasing dye solution in said voids to form a laser host medium is disclosed.

US Patent:

47558180, Jul 5, 1988

Filed:

Aug 15, 1986

Appl. No.:

6/896788

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G08G 504

US Classification:

340961

Abstract:

An aircraft collision warning system in which a low power pulsed laser sym projects narrow bandwidth radiation into 4. pi. steradians around an aircraft and a matched, narrow bandwidth receiver system, with a 4. pi. steradian field-of-view which detects such radiation emitted from another aircraft within range of the receiver and activates appropriate warning.

US Patent:

43295835, May 11, 1982

Filed:

Jun 23, 1980

Appl. No.:

6/162333

Inventors:

Raymond W. Conrad - Russellville AL
Aryeh Kidron - Huntsville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01J 3149

US Classification:

250330

Abstract:

A device for the passive location of irradiance display of high power infed beams at remote locations utilizing the combination of reflecting material with high thermal conductivity and an absorbing refractory material with high emissivity in the visible portion of the electromagnetic spectrum.

US Patent:

41674634, Sep 11, 1979

Filed:

Apr 12, 1978

Appl. No.:

5/895837

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

B01J 110
B01K 100

US Classification:

2041571R

Abstract:

Disclosed is a method and device for the fixation of atmospheric nitrogen ilizing the very high temperature and rapid quenching rates of plasmas produced by the focused beam of a repetitively-pulsed, high energy laser. The irradiance at the focal point of a mirror employed in the nitrogen fixation reaction chamber exceeds that required for plasma production in clear air, namely: 10. sup. 9 watts/cm. sup. 2 at 10. 6 micrometers; consequently, a plasma is produced every time the laser pulses. The laser pulse length being short causes rapid quenching of the plasma thereby preventing decomposition of the nitric oxide formed from a mixture of nitrogen and oxygen introduced at an elevated pressure through an inlet to the nitrogen fixation reaction chamber. The reaction gas mixture containing the nitric oxide is extracted from the reaction chamber through an outlet means. The nitric oxide is subsequently removed by scrubbing with water, or by other extraction techniques well established in the art.

US Patent:

H6530, Jul 4, 1989

Filed:

Jul 15, 1988

Appl. No.:

7/219546

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 916

US Classification:

343792

Abstract:

A superconducting, superdirective antenna array wherein a superconductive terial is employed for the elements of the array which are arranged in a uniform half-wave dipole has low ohmic resistance and a very high radiation efficiency. The superdirective antenna array which is a linear array has element spacing less than. lambda. o/2 where. lambda. o is the center frequency of the dipoles. The material of the array elements has a very high critical current (i. e. , and a critical magnetic field), a requirement for maximum efficiency. The superconducting, superdirective antenna array is housed in a vacuum insulated container and is provided outlet connecting to means for obtaining and sustaining a vacuum as required for element material of fabrication. The material of fabrication for the antenna array elements is selected from a type II superconductor material selected from the group consisting of iridiumm, lead, mercury, tantalum, vanadium, a composite of niobium-tin-bronze, and alloys of the same. The antenna array element material of fabrication, as fabrication techniques become available, can be a superconductive material selected from the ceramic oxides composition group consisting of La. sub. 2-x Ba. sub. x CuO. sub. x and YBa. sub. 2 Cu. sub. 3 O. sub.

US Patent:

41795997, Dec 18, 1979

Filed:

May 8, 1978

Appl. No.:

5/903417

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

B23K 900

US Classification:

219121P

Abstract:

Plasma generation occurs when radiation from a high power, infrared laser is directed to a sufficiently short focal point to produce the irradiance required for producing a plasma or laser-supported combustion wave, with the assistance of external plasma initiation apparatus such as an electrode discharge. The laser beam is directed through a cylindrical or conical chamber to the electrode discharge means. The chamber allows a controlled flow of gas to be introduced into the chamber, flowing in the direction of the laser beam to exhaust at the end of the chamber. A plasma is ignited, using the plasma initiation device and is prevented from propagating up the laser beam by the opposing flow of gas. The position of the plasma along the laser beam axis and the plasma temperature are controlled by the velocity of the gas flow. As the gas velocity is increased, the plasma is forced to retreat into higher intensity regions of the converging laser beam, where it absorbs more energy from the beam thereby reaching higher temperatures.

US Patent:

41526252, May 1, 1979

Filed:

May 8, 1978

Appl. No.:

5/903638

Inventors:

Raymond W. Conrad - Russellville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H05H 110

US Classification:

3151117

Abstract:

A method and apparatus for initiating a stable plasma and maintaining the asma stationary. A high power, continuous wave laser is used to initiate and maintain the plasma, while a magnetic trap confines the plasma.

US Patent:

46926232, Sep 8, 1987

Filed:

Feb 13, 1986

Appl. No.:

6/835826

Inventors:

Thomas G. Roberts - Huntsville AL
Raymond W. Conrad - Russellville AL
William F. Otto - Huntsville AL
Thomas E. Honeycutt - Somerville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G01K 1700

US Classification:

250349

Abstract:

The meter consists of wire resistors arranged so as to sample the energy in a laser beam at different locations in the beam. Each resistor is part of a bridge which includes three other resistors, a power source, a detector (volt meter) and a display unit which may be a recorder. One of the three additional resistors may be an additional set of wires which are made nearly identical to the set being used to sense the laser beam's position or to determine its intensity distribution. When the wire resistors are exposed to the laser beam the wires are heated, their resistance changes, and the various bridges become unbalanced. The magnitude of the voltage produced in each bridge is proportional to the energy in the laser pulse at the location of each wire.