Engineering topics

Tarle, G.

Publications and source records attributed to Tarle, G..

38 records · Page 3

NASA NTRS1975

The University of California Iron Isotope Experiment

We suggest a novel technique for resolving neighboring isotopes of iron-group nuclei with abundance ratios as great as 20:1 over the energy range from about 360 to about 550 MeV/nucleon. The determination of mass is based on the proportionality between mass and range and the negligible magnitude of range straggling. A balloon-borne experiment based on this technique is described which uses active electronic counters to measure particle speed, trajectory, and charge, and a passive polycarbonate plastic stack to measure range.

Ahlen, S. P.↗

NASA NTRS1975

Sonic spark chambers for cosmic-ray experiments

The sonic spark chamber provides an attractive high resolution hodoscope for low flux cosmic ray experiments. Spark position is determined by measurement of the time of flight of the sonic shock front from the spark position to a number of piezoelectric transducers placed at the periphery of the chamber. For each spark, four quantities must be determined: the spark coordinates, the sound velocity, and the spark 'size'. By over-determining the four parameters, high accuracy is possible. With eight sonic transducers, air-gap spark positions were measured with an error of less than 100 microns everywhere over a 1 sq m region.

Ahlen, S. P.↗