Space Lab-3 Anuradha detector response and the expected charge resolution

Details Space Lab-3 Anuradha detector response and the expected charge resolution Space Lab-3 Anuradha detector response and the expected charge resolution

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nimpb..51...63y&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section B, Volume 51, Issue 1, p. 63-68.

Physics

8

Scientific paper

We have analyzed the response of Space Lab-3 Anuradha detector by using internal calibration. We give the calibration results with accelerated C, N, O, Ne and Fe ion beams. The response function contains a linear term along with a power term which is the distinguishing characteristic of CR-39 track detectors. We have calculated a charge histogram for measured data using bicubic interpolation. The deconvolution spectrum is calculated using a nonlinear least x2 method. This analysis shows that charges 6, 7, 8, 10, 12, 16, 18, 20, 22, 23, 24, 25, 26, 28, 29, 30 are observed on the basis of single cone identification. Our results agree with results from the multicone identification technique (in the Z >= 20 charge region, each cosmic ray event produces more than one measurable cone) as well as with the galactic cosmic ray (GCR) abundances, and in low charge region agrees with the anomalous cosmic rays (ACR) abundances. This method gives charge resolution, σz = 0.285 + 0.03 Z, which corresponds to 0.5 charge units for oxygen tracks and ~ 1 charge unit for iron tracks (this reduces to 0.3 charge units in the case of the multicone identification method). The dependence of charge resolution on charge is weak but significant. Our simulated charge histogram agrees with the measured charge histogram.

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