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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Linear least-square method resolves complex pulse height spectra, allowing for calculation of relative intensity, of statistical variance based on counting statistics of the correlation between library components, and of the goodness-of-fit chi square. Some applications are to gamma-ray, X ray, and charged-particle spectroscopy.
A flight-worthy pulse height analyzer that has a quadratic transfer function is described. This quadratic function permits optimum usage of the entire PHA dynamic range due to the quadratic nature of the gamma ray spectrometer's resolution vs energy. After the theoretical design discussion, the implementation of the design is examined and test results described. The analyzer is part of the University of New Hampshire gamma ray monitor for OSO-H.
Analog-to-digital converter-pulse height analyzer for data reduction from balloon measurements
Single-channel pulse-height analyzer measures nuclear state lifetimes shorter than one nanosecond. The customary logic arrangement is reversed to reduce timing errors.
Consumption multichannel pulse height analyzer performs balloon and rocket investigations of solar neutrons with energies greater than 10 MeV. The lightweight unit can operate in a temperature range of minus 30 degrees to plus 70 degrees C and withstand storage temperatures from minus 50 degrees to plus 90 degrees C.
A system for measuring the pulse height distribution of gigahertz bandwidth photomultipliers was developed. This system uses a sampling oscilloscope as a sample-hold circuit and has a bandwidth of 12 gigahertz. Test results are given for a static crossed-filed photomultiplier tested with a demonstration system. Calculations on system amplitude resolution capabilities are included for currently available system components.
Pulse height analyzer for charged particle spectroscopy on lunar surface
Photomultipliers single electron response by measuring electron pulse height distribution
Computer programs for processing two-dimensional analyzer pulse height data for automatic separation of gamma and neutron counts
Atomic scattering contribution to pulse height defect and energy dispersion of heavy ions in semiconductor detectors
Low-power multichannel pulse height analyzer for solar neutron detection aboard balloon or rocket
Three parameter pulse height analyzer and coincidence system for satellite-borne scintillation telescope study of cosmic radiation
Circuit design modification of converter and readout system by addition of charge amplifiers at inputs and by addition of fourth D channel- four-parameter pulse height analyzer
Pulse height analyzer and logic circuits for IMP SATELLITE nuclear abundance experiments for identifying cosmic ray particles
Pulse height analyzer and logic circuits for interplanetary monitoring platform nuclear abundance experiment - explorer xviii
Energy scale for pulse height distributions from gamma ray spectrometers based on inorganic scintillators
Scientific satellites pulse height analyzer and associated threshold detection and logic circuitry
Study shows the pulse-height degradation of gamma ray spectra in germanium/lithium detectors to be due to electron interaction in the dead layers that exist in all semiconductor detectors. A pulse shape discrimination technique identifies and eliminates these defective pulses.