Charles S Pike, 917405 Bay Island Dr S APT 223, Saint Petersburg, FL 33707

4636287, Jan 13, 1987

Oct 28, 1983

6/546633

Charles T. Pike - Lexington MA
Horace W. Furumoto - Wellesley MA
Lawrence A. Levin - Beer Sheva, IL

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

B01D 5900

20415715

Method and apparatus for exciting particles in an environment in which a selected isotope, of broadened spectral absorption bandwidth, is exposed to laser radiation having a frequency bandwidth substantially narrower than the spectral width. The laser radiation is frequency swept entirely across the broadened spectral width of the absorption band of the selected isotope type particles to provide spectral matching with substantially all of these particles. A laser system is provided having the capability of sweeping a narrow spectral emission entirely across a broadened spectral absorption band.

4156144, May 22, 1979

Jun 25, 1974

5/483077

Charles T. Pike - Lexington MA
Horace W. Furumoto - Wellesley MA
Lawrence A. Levin - Beer Sheva, IL

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01J 3708

250423P

Method and apparatus for achieving isotopically selective adiabatic inversion, particularly for improved isotope separation efficiency. In a preferred embodiment for practicing the invention, chirped laser radiation induces photoionization of a vapor state material in isotopically selective excitation and ionization energy steps. A frequency sweep or "chirp" is provided in the excitation laser radiation at a controlled rate and over a range of frequencies which is limited to prevent loss of selectivity in the excitation. The frequency swept radiation has a theoretical capability of producing 100% inversion of ground state particles in the vapor. The features of the invention additionally permit excitation of a material to very high energy states useful in producing high frequency, ultraviolet lasing.

4023038, May 10, 1977

Sep 19, 1974

5/507583

George Sargent Janes - Lincoln MA
Charles T. Pike - Lexington MA

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01J 3934

250423P

A system employing multiple, upper excitation levels in a technique for isotopically selective ionization to improve the ionization efficiency. In a technique which employs laser radiation to excite particles with isotopic selectivity, excitation is produced to a plurality of excited states below the ionization level with the result of increasing the number of available excited particles for ionization and thereby increasing the ionization cross-section for improved system efficiency.

3944947, Mar 16, 1976

Nov 1, 1974

5/520047

Charles T. Pike - Lexington MA
Richard H. Levy - Seattle WA

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01S 302

331 945D

A laser amplifier system having plural parallel paths for amplification of laser radiation from a single, stable laser oscillator. The plural paths of laser amplification are excited to produce sequential pulses of amplified output radiation that are interleaved by an optical combining system to produce a single path of amplified, pulsed radiation of increased repetition rate.

4757295, Jul 12, 1988

Sep 16, 1987

7/097047

Charles T. Pike - Lexington MA

Avco Research Laboratory, Inc. - Everett MA

H01F 1504

336 84C

A pulsed transformer capable of providing up to 500 kilovolt or higher, 10 nanosecond rise time, and 1000 joule or higher pulses comprising non-conducting or insulated transformer cores each separated by conductive grading rings wherein n coaxial cables in combination with the grading rings are connected in parallel at one end and in series at their other ends. The transformer may function as either an inverting or non-inverting transformer. In a transformer with n cables, if a pulse voltage of V is applied to the input, an output voltage of nV will appear at the output. The cores function to isolate the coxial cables and permit them to be connected in series at their one end. Weight may be minimized by operating the transformer in gaseous Freon rather than transformer oil.

4099131, Jul 4, 1978

Sep 2, 1975

5/609784

Charles T. Pike - Lexington MA

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01S 3093
H01S 320

330 43

A free jet dye laser having a sheet of fluent laser material bounded along its edges by a pair of opposed guide members. An orifice injects the sheet of laser fluid into the region between the guide members where it flows towards a transparent portion of the guide members through which a beam of laser radiation to be amplified is directed. Pump excitation in the form of laser energy is applied through an exposed surface of the flowing laser material in the region between the transparent portions.

4257013, Mar 17, 1981

Nov 8, 1978

5/958623

Charles T. Pike - Lexington MA
Horace W. Furumoto - Wellesley MA
Lawrence A. Levin - Beer Sheva, IL

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01S 3091

331 945P

Method and apparatus for achieving isotopically selective adiabatic inversion, particularly for improved isotope separation efficiency. In a preferred embodiment for practicing the invention, chirped laser radiation induces photoionization of a vapor state material in isotopically selective excitation and ionization energy steps. A frequency sweep or "chirp" is provided in the excitation laser radiation at a controlled rate and over a range of frequencies which is limited to prevent loss of selectivity in the excitation. The frequency swept radiation has a theoretical capability of producing 100% inversion of ground state particles in the vapor. The features of the invention additionally permit excitation of a material to very high energy states useful in producing high frequency, ultraviolet lasing.

3984786, Oct 5, 1976

May 28, 1975

5/581648

Charles T. Pike - Lexington MA

Jersey Nuclear-Avco Isotopes, Inc. - Bellevue WA

H01S 302

331 945L

A nozzle for a free jet dye laser wherein the nozzle orifice has an adjustable convex contour to permit realization of precisely plane parallel sides in the central jet region. A jet of this precision is desired to support a high quality laser beam for use in laser enrichment apparatus. The precise planar characteristic of the central portion of the jet is achieved by a narrowing of the central portion of the nozzle orifice. A set of adjustment screws are provided to define the specific contour of the narrowing to insure that the sides of the free jet are precisely plane parallel. A system is shown for detecting the degree to which the sides are plane parallel so that an optimum adjustment in the orifice can be achieved.