Nuclear interactions of high energy heavy ions and applications in astrophysics

Details Nuclear interactions of high energy heavy ions and applications in astrophysics Nuclear interactions of high energy heavy ions and applications in astrophysics

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989lsu..rept.....w&link_type=abstract

Technical Progress Report, 1 Apr. 1989 - 31 Mar. 1990 Louisiana State Univ., Baton Rouge. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Computer Programs, Heavy Ions, Nuclear Interactions, Time Of Flight Spectrometers, Angular Distribution, Oxygen Isotopes, Silicon Isotopes

Scientific paper

The calibration and performance evaluation are mostly completed for the drift chamber trajectory subsystem, the calibration was finished of the detector PSD's, and preliminary mass resolution was obtained for the fragments of Silicon in the solid state detector telescope. New processing software was written for the Oxygen and the Silicon datasets, and reprocessing (Oxygen)/initial processing (Silicon) is to be undertaken in the next few months. The analysis of the energy dependence of the widths of the longitudinal momentum distributions was re-done with a different analysis technique, confirming the previous results and adding confidence to the conclusions. The total charge changing cross sections for silicon have also undergone a reanalysis and detailed comparison to different models. The drift tube calibrations were finalized and significant progress was made in understanding the HISS drift chamber calibration and operation during the run. New drift chamber analysis software is nearly complete and will be checked in an initial data processing pass in the next several months. Preliminary time-of-flight wall beam calibrations show charge resolution below 0.1 units and time resolution of 90 pico-seconds (Neon) and 127 pico-seconds (Helium). These will improve when the full time-of-flight subsystem calibration is performed, the next task following the completion of the drift chamber calibration/software development.

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