Accession Number : AD0671553

Title :   STUDY OF THE INTENSITY TIME VARIATIONS OF THE COSMIC RADIATION.

Descriptive Note : Final rept., 1 Nov 62-31 Oct 67,

Corporate Author : NEW HAMPSHIRE UNIV DURHAM DEPT OF PHYSICS

Personal Author(s) : Lockwood,John A.

Report Date : MAY 1968

Pagination or Media Count : 229

Abstract : The data-recording systems for the cosmic-ray neutron monitors at Durham and Mt. Washington were completely automated and neutron multiplicity systems added. The barometric pressure coefficients for both monitors were reevaluated. New differential response and specific yield functions were deduced for neutron monitors at sea level and mountain elevations with vertical cutoff rigidities in the interval 0.7 less than P sub c less than 10 Gv. From the variation in the intensity recorded by neutron monitors from 1958 to 1965, the solar modulation has been found to be described exp(-K/P) for 0.5 less than P less than 50 Gv. An investigation was made of the solar flare associated cosmic-ray increase on Jan. 28, 1967, as recorded by the neutron monitors. The properties of three different types of boron-loaded liquid scintillators were investigated as possible detectors for measuring the neutron leakage flux from the earth's atmosphere. Measurements of the neutron intensities above the atmosphere at rocket altitudes with a moderated He3 neutron detector were completed. (Author)

Descriptors :   (*COSMIC RAYS, RADIATION MONITORS), (*SOLAR FLARES, COSMIC RAYS), NEUTRON DETECTORS, INTENSITY, DIURNAL VARIATIONS, RECORDING SYSTEMS, RESPONSE, BORON, SCINTILLATION COUNTERS, HELIUM, NEUTRON FLUX, DETECTION, BAROMETRIC PRESSURE, HIGH ALTITUDE, DATA PROCESSING

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE