Daniel P Gordon

US Patent:

8351476, Jan 8, 2013

Filed:

Jun 21, 2012

Appl. No.:

13/529167

Inventors:

Richard F. Hubbard - Burke VA, US
Antonio C. Ting - Silver Spring MD, US
Joseph R. Peñano - Fairfax Station VA, US
Daniel F. Gordon - Waldorf MD, US
Phillip A. Sprangle - Great Falls VA, US
Bahman Hafizi - Bethesda MD, US
Arie Zigler - Washington DC, US

Assignee:

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

International Classification:

H01S 3/10
H01S 3/098

US Classification:

372 30, 372 25, 372 2901, 372 29014

Abstract:

A system and methods for the quasi-remote compression and focusing of a moderate-intensity laser pulse to form a much higher intensity beam that can be directed at a target and used as a probe beam or used in a probe beam converter to generate other forms of electromagnetic radiation or energetic particles. A system for the quasi-remote propagation of high-intensity laser beams in accordance with the present invention comprises a main platform on which a first, “seed” laser pulse is generated, stretched, and amplified, and a remote platform, located at a distance from the main platform, which is configured to receive the amplified and stretched pulse and convert it into the high-intensity laser beam. The high-intensity laser beam in turn can then be converted into one or more probe beams directed at a target object.

US Patent:

8564224, Oct 22, 2013

Filed:

May 17, 2011

Appl. No.:

13/109131

Inventors:

Phillip A. Sprangle - Great Falls VA, US
Steven H. Gold - New Carrollton MD, US
Antonio C. Ting - Silver Spring MD, US
Joseph R. Penano - Fairfax Station VA, US
Daniel F. Gordon - Waldorf MD, US
Bahman Hafizi - Bethesda MD, US

Assignee:

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

International Classification:

H01J 23/06
H01J 3/14

US Classification:

315500, 250396 R

Abstract:

An electron injector including an electron source and a conducting grid situated close to the electron source, one or more RF accelerating/bunching cavities operating at the same fundamental RF frequency; a DC voltage source configured to bias the cathode at a small positive voltage with respect to the grid; a first RF drive configured to apply an RF signal between the cathode and grid at the fundamental and third harmonic RF frequencies; and a second RF drive configured to apply an RF drive signal to the accelerating/bunching cavities. Electrons are emitted by the cathode and travel through the grid to the accelerating/bunching cavities for input into an RF linac. The first RF drive applies a first RF drive signal at the fundamental frequency of the linac plus higher harmonics thereof to the gap between the cathode and the grid to cause the emitted electrons to form electron bunches and the second RF drive applies a second RF drive signal to the accelerating/bunching cavities on the other side of the grid to further accelerate and optimize the size of the electron bunches. Because the applied RF signals contain at the fundamental linac frequency, the electrons are bunched at that frequency and each RF bucket of the linac is filled with an electron bunch.

US Patent:

20050203551, Sep 15, 2005

Filed:

Oct 29, 2004

Appl. No.:

10/977756

Inventors:

Kevin Weadock - Princeton NJ, US
William McJames - Belle Meade NJ, US
Peter Douglas - New Milford NJ, US
Daniel Gordon - Keyport NJ, US

International Classification:

A61B017/08

US Classification:

606153000

Abstract:

A method for performing a coronary artery bypass graft procedure on a patient to connect a bypass vessel to a target vessel includes the steps of creating an opening in the patient that communicates with the thoracic cavity of the patient; providing a bypass vessel having a lumen and at least one free end; passing the free end of the bypass vessel from the thoracic cavity through the opening to a position outside the body of the patient; attaching a connector to the free end of bypass vessel while the free end of the bypass vessel is outside the body of the patient; passing the free end of the bypass vessel from the position outside the body of the patient through the opening and into the thoracic cavity; and connecting the free end of the bypass vessel to a target vessel with the connector.

US Patent:

20120114007, May 10, 2012

Filed:

Nov 10, 2011

Appl. No.:

13/293338

Inventors:

Theodore G. Jones - Alexandria VA, US
Antonio C. Ting - Silver Spring MD, US
Daniel F. Gordon - Waldorf MD, US

Assignee:

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

International Classification:

H01S 3/20

US Classification:

372 51

Abstract:

Methods for producing a laser-guided underwater electrical discharge are provided. One or more electrodes defining a desired electrical discharge path are situated in a body of water and are attached to an external electrical power supply. A high-powered, intense laser beam is fired into the water. The laser beam forms an optical filament in the water, which in turn forms an ionized channel having a much greater conductivity than the surrounding water. An external power supply drives an electrical discharge along the path of the ionized channel due to its greater conductivity.

US Patent:

20130148685, Jun 13, 2013

Filed:

Dec 12, 2012

Appl. No.:

13/711752

Inventors:

Theodore G. Jones - Alexandria VA, US
Antonio C. Ting - Silver Spring MD, US
Daniel F. Gordon - Waldorf MD, US
Michael H. Helle - Arlington VA, US
Joseph R. Peñano - Fairfax Station VA, US

International Classification:

H01S 1/04

US Classification:

372 51

Abstract:

A method for generating an extended underwater plasma. A first laser pulse is fired into a body of water to form an underwater optical filament coinciding with a low-energy plasma. A second laser pulse is fired into the water, targeted at the plasma. The second pulse heats the plasma, causing the formation of an extended superheated plasma volume in the water. The two laser pulses can be simultaneous or can be sequential, with the second pulse following the first pulse by up to the filament plasma lifetime. The extended superheated plasma creates an underwater acoustic pulse, wherein the duration, waveform and directivity of the pulse can be tailored by controlling the shape of the underwater laser-generated plasma.

US Patent:

43014186, Nov 17, 1981

Filed:

Sep 13, 1978

Appl. No.:

5/942006

Inventors:

Daniel I. Gordon - Chevy Chase MD
Leonard J. Schwee - Colesville MD
Wallace E. Anderson - Beltsville MD

Assignee:

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

International Classification:

H03F 1500

US Classification:

330 62

Abstract:

A process and a small, sensitive, low noise, high gain, power amplifier used in the process, for exploiting the anisotropic magnetoresistance effect in a ferromagnetic thin-film. The magnetization of the thin-film is biased to lie along the hard axis. The amplifier is configured so that a sensing current in the thin-film flows at an angle of forty-five degrees to the nominal direction of magnetization, and the current to be amplified produces a magnetic field parallel to the easy axis of the thin-film.

US Patent:

20160345420, Nov 24, 2016

Filed:

May 12, 2016

Appl. No.:

15/152627

Inventors:

- Arlington VA, US
Michael H. Helle - Arlington VA, US
John Palastro - College Park MD, US
Antonio C. Ting - Silver Spring MD, US
Daniel F. Gordon - Alexandria VA, US
Yu-hsin Chen - Fairfax VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

H05H 1/48

Abstract:

A plurality of gas jet nozzles having equal angular separation around a central axis eject gas flows towards the central axis. The gas flows collide and form a gas channel from the neutral gas, the gas channel having a gas density depression at the center of the intersecting gas flow, where the gas density depression is surrounded by a higher density gaseous wall along the central axis. Ionization of the gas in the center produces a plasma channel that can guide a laser pulse fired into the gas along the central axis. The geometric arrangement of the gas jets and/or the backing pressure of the gas flows are configured to produce a gas channel having a predetermined density profile such that the ionized gas forms a plasma channel laser guiding structure configured to guide a laser pulse having predetermined spatial parameters.

US Patent:

20160014874, Jan 14, 2016

Filed:

Jul 14, 2015

Appl. No.:

14/798599

Inventors:

Dmitri Kaganovich - Potomac MD, US
Antonio C. Ting - Silver Spring MD, US
Michael H. Helle - Arlington VA, US
Daniel F. Gordon - Alexandria VA, US
Bahman Hafizi - Bethesda MD, US
John Palastro - College Park MD, US

Assignee:

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

International Classification:

H05G 2/00

Abstract:

A method for generating coherent, polarized, and tunable X-rays using a single laser pulse is provided. An ultrashort laser pulse is fired into a plasma. As the laser beam travels through the plasma, some of its photons are backscattered, e.g., through Raman backscattering, to generate a counter-propagating photon beam that is co-linear with the original laser beam. When the backscattered photons interact with high-energy accelerated periodic electron bunches, coherent X-rays are generated through Compton backscattering of the photons off of the electrons. The energy of the backscattered X-rays can be tuned by tuning one or more characteristics of the laser pulse and/or the plasma.

Address:

43292 Atherton St, Ashburn, VA 20147

Phone:

2023411239

VIN:

5FNRL5H69BB102910

Make:

HONDA

Model:

ODYSSEY

Year:

2011