SEARCH · Engineering Papers

Results for “COSMIC”

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.

SourceResearch connectionFrom yearThrough year

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,315 records · Page 73

All sources NASA NTRS DOE OSTI

NASA NTRS1964

Solar cosmic ray propagation characteristics.

Solar cosmic ray propagation and adequacy of current models to explain modes of propagation

COSMIC RAY PROPAGATION↗

NASA NTRS1965

Low-energy spectrum of cosmic rays as an indicator of primary source characteristics and interstellar propagation.

Low energy spectrum of cosmic rays corrected for solar modulation and diffusive passage through interstellar matter

PROTON SCATTERING↗

NASA NTRS1966

Solar cosmic ray heavy nuclei and the 18th July 1961 event.

Balloon-borne nuclear emulsion detection of solar cosmic ray heavy nuclei during solar burst

HEAVY COSMIC RAY PRIMARY↗

NASA NTRS1966

Solar cosmic-ray multiply charged nuclei and the July 19, 1961, solar event.

Solar cosmic ray multiply charged nuclei and July 18, 1961 solar event, discussing relative abundances and heavy nuclei detection

SOLAR COSMIC RAY↗

NASA NTRS2013

Time Variations of Cosmic-Ray Helium Isotopes with BESS-Polar I

The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.

Cosmic-ray flux time variations↗

NASA NTRS1961