Other

Los Alamos National Security, LLC

Martin R Sweet

James Edward Stewart

Wynne Kevin Grace

Karen M Grace

Steven C Bourret

Roy M Goeller

Merlyn S Krick

Leland Jean Morrison

Jerome D Kolar

An optical biosensor has a first enclosure with a pathogen recognition surface, including a planar optical waveguide and grating located in the first enclosure. An aperture is in the first enclosure for insertion of sample to be investigated to a position in close proximity to the pathogen recognition surface. A laser in the first enclosure includes means for aligning and means for modulating the laser, the laser having its light output directed toward said grating. Detection means are located in the first enclosure and in optical communication with the pathogen recognition surface for detecting pathogens after interrogation by the laser light and outputting the detection. Electronic means is located in the first enclosure and receives the detection for processing the detection and outputting information on the detection, and an electrical power supply is located in the first enclosure for supplying power to the laser, the detection means and the electronic means.

Integrated optical biosensor system (IOBS)

This invention relates to a method and apparatus for improving the precision of at least one of neutron coincidence counting and neutron multiplicity counting. The method includes the steps of: (1) sampling the real and accidental coincident pulses at the incoming pulse rate; and (b) sampling the accidental coincidences at a clock rate, wherein the clock rate is much faster than the pulse rate. The clock rate is faster than the pulse rate by a factor of 5 to 10 (in the preferred embodiment, approximately 4 MHz). The apparatus for improving the precision of neutron coincidence counting includes: (a) a shift register; (b) an up-down counter coupled to the shift register; (c) an R&plus;A accumulator coupled to the up-down counter; (d) an A accumulator coupled to the up-down counter; (e) a strobe, the strobe coupled to the R&plus;A accumulator but not to the A accumulator; (f) a clock, the clock coupled to the A accumulator but not to the R&plus;A accumulator, the clock having a rate which is much faster than the pulse rate; and (g) apparatus for reconciling the independent counting of the A accumulator with that of the R&plus;A accumulator. For improving the precision of multiplicity counting the apparatus includes an R&plus;A multiplicity accumulator and an A multiplicity accumulator, The R&plus;A multiplicity accumulator is connected to the up-down counter and the strobe, but not to the clock. The A multiplicity accumulator is coupled to the up-down counter and the clock, but not to the strobe. The clock rate is faster than the pulse rate by a factor of 5-10 (in the preferred embodiment, approximately, 4 MHz). The apparatus also includes apparatus for accumulating the total number of pulses, which is coupled to the strobe and the reconciling apparatus.

Advanced electronics for faster time-correlation analysis of pulse sequences

Growing community of inventors

Los Alamos, NM, United States of America

Martin R Sweet