Michael D Read

US Patent:

57930139, Aug 11, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/476081

Inventors:

Michael E. Read - Oakton VA
John F. Davis - Alexandria VA
Michael M. Micci - Warriors Mark PA

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

B23K 1000

US Classification:

21912148

Abstract:

A microwave-driven plasma spraying apparatus can be utilized for uniform high-powered spraying. The plasma sprayer is constructed without a dielectric discharge tube, so very high microwave powers can be utilized. Moreover, the plasma sprayer is relatively free of contamination caused by deposits of heat-fusible material.

US Patent:

46617833, Apr 28, 1987

Filed:

Mar 18, 1981

Appl. No.:

6/244947

Inventors:

Avraham Gover - Tel Aviv, IL
Michael E. Read - Vienna VA

Assignee:

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

International Classification:

H01J 2536
H01S 300
H03B 908

US Classification:

331 82

Abstract:

Free-electron lasers and masers are modified by eliminating the resonator cavity as such. The feedback mechanism, essential to oscillation, is distributed through and integrated with the transmission line which guides the electromagnetic wave at the active region where interaction with the electron beam takes place. The feedback structure is created by perturbations in the transmission line along the length thereof at the locations of the zero electric field lines of a desired oscillatory standing wave mode. The perturbations may take the form of axial, helical, and azimuthal deformation of the transmission line.

US Patent:

59732890, Oct 26, 1999

Filed:

Feb 17, 1998

Appl. No.:

9/024291

Inventors:

Michael E. Read - Oakton VA
John F. Davis - Alexandria VA
Michael M. Micci - Warriors Mark PA

Assignee:

Physical Sciences, Inc. - Andover MA

International Classification:

B23K 1000

US Classification:

21912148

Abstract:

A microwave-driven plasma spraying apparatus can be utilized for uniform high-powered spraying. The plasma sprayer is constructed without a dielectric discharge tube, so very high microwave powers can be utilized. Moreover, the plasma sprayer is relatively free of contamination caused by deposits of heat-fusible material.

US Patent:

45544840, Nov 19, 1985

Filed:

Aug 29, 1983

Appl. No.:

6/527626

Inventors:

Michael E. Read - Oakton VA
Yuval Carmel - Haifa, IL
Kwo R. Chu - Annandale VA
Achintya K. Ganguly - Alexandria VA

Assignee:

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

International Classification:

H01J 2500

US Classification:

315 4

Abstract:

A complex cavity gyrotron designed for stable operation at high order modes. The device comprises circuitry for generating an annular electron beam, a coupled cavity disposed coaxially with the electron beam and having a first and second adjacent coaxial sections with the dimensions of these coaxial sections adjusted so that different modes with the same azimuthal eigen number but different radial eigen numbers are simultaneously resonant at approximately the same frequency in the two sections, and circuitry for generating an axial magnetic field within the cavity. Few, if any, combinations of modes other than the combination chosen will simultaneously resonate in the cavity thereby effecting higher order mode suppression. The present design has a low susceptibility to beam velocity spread and is effective for any combination of modes with identical azimuthal eigen numbers.