Patents – Luis W. Alvarez

Alvarez Page · Resources with Additional Information


US 2,545,595 LINEAR ACCELERATORS – Alvarez, L. W.; Mar 20, 1951 (to U.S. Atomic Energy Commission)
The patent describes a linear ion accelerator employing energized wave guides in connection with spaced drift tubes capable of producing an effective ion beam of 45 Mev or more.

US 2,685,027 RADIOACTIVITY MEASUREMENT – Alvarez, L. W.; Jul 27, 1954 (to U.S. Atomic Energy Commission)
A method and means for measuring and analyzing radioactivity which decays rapidly are reported.  The irradiated samples are placed in a counter, pulses from which and timing pulses ¼ second apart are amplified and fed into a coil.  The pulses are transferred as magnetic domains on a wire passing through the magnetic circuit of the coil.  The wire is wound on a reel and may be played back to obtain data for determining the decay rate.

US 2,933,442  ELECTRONUCLEAR REACTOR – Lawrence, E. O.; McMillan, E. M.; Alvarez, L. W.; Apr 19, 1960 (to U.S. Atomic Energy Commission)
An electronuclear reactor is described in which a very high‑energy particle accelerator is employed with appropriate target structure to produce an artificially produced material in commercial quantities by nuclear transformations. The principal novelty resides in the combination of an accelerator with a target for converting the accelerator beam to copious quantities of low‑energy neutrons for absorption in a lattice of fertile material and moderator. The fertile material of the lattice is converted by neutron absorption reactions to an artificially produced material, e.g., plutonium, where depleted uranium is utilized as the fertile material.

US 3,114,832 X-RAY SPECTROSCOPIC SYSTEM COMPRISING PLURAL SOURCES, FILTERS, FLUORESCENT RADIATORS, AND COMPARATIVE DETECTORS – Alvarez, L. W.; Dec 17, 1963 (to Radiation Counter Labs., Inc.); Filed Jul 28, 1960
An x-ray spectroscopic system for determining the presence of a particular element in a body of matter is patented. The determination can be made quickly and reliably without altering the body. X-rays of 2 different wavelengths are used, one slightly longer and one slightly shorter than the wavelength of an absorption edge of the element to be determined. The x-ray wavelengths must also lie between the corresponding absorption edges of the next higher and next lower elements in atomic number. The element to be determined will absorb a larger proportion of the shorter wavelength, while all the other elements will absorb a larger proportion of the longer wavelength. The apparatus can be adjusted so that the intensities of the x-rays transmitted through the body are approximately equal in the absence of the element to be determined. The measurements will remain nearly equal regardless of the attenuation of the x-rays, except in the presence of the element to be determined. Details of the design of the apparatus are described and diagrammed. (M.P.G.)

US 3,366,794 SCANNING APPARATUS FOR AIDING IN THE DETERMINATION OF POINT CO-ORDINATES OF PATHS OF CHARGED PARTICLES AS RECORDED ON PHOTOGRAPHIC FILM – Alvarez, L. W.; 1968 Jan 30, 1968 (to U.S. Atomic Energy Commission)
A high-speed film scanning device for bubble chamber data analysis which operates on-line with a computer for immediate bubble track measurement and particle event verification is described.  A rotating drum circulates a periscoped image of the film portion within the scanning aperture over a surface containing gridwork of light-sensitive benchmarks.  Upon coincidence of a film bubble on a benchmark, the combined data of the translational position of the real aperture, the rotational position of the image aperture and the known location of the benchmark is operated on by the computer and immediately indicates the bubble position with respect to the major fiducial points of the film. (AEC)

US 3,659,105 SUBATOMIC PARTICLE DETECTOR WITH LIQUID ELECTRON MULTIPLICATION MEDIUM – Alvarez, L. W.; Derenzo, S. E.; Muller, R. A.; Smits, R. G.; Zaklad; Apr 25, 1972 (to U.S. Atomic Energy Commission); Filed Oct 21, 1970
A subatomic particle detector having a large number of equally spaced anode conductors arranged in a single plane opposite and parallel to a large cathode plate with the space between the anode conductors and cathode plate filled with liquid argon is described.  A phototransistor is connected to each conductor for automatic readout of the detector by means of a laser beam that is scanned over each phototransistor. (auth)

US 4,756,866 NITROGEN DETECTION – Alvarez, L. W.; Jul 12, 1988; Filed Oct 9, 1985
A nitrogen concentration detection apparatus useful for the detection of nitrogen concentration in an article containing suspect nitrogen is described comprising; a source of x-ray energy exceeding 30.64 MeV, at least two gamma ray detectors aligned near the path of the generated x-ray for detecting the 511 keV annihilation gamma radiation produced by the reaction of /sup 14/N(gamma, 2n)/sup 12/N; and means for conveying the article proximate the x-ray source and the gamma ray detectors.


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