Statistics – Methodology
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phdt.........7c&link_type=abstract
Thesis (PhD). UNIVERSITY OF ALABAMA IN HUNTSVILLE, Source DAI-B 59/12, p. 6352, Jun 1999, 143 pages.
Statistics
Methodology
Scientific paper
A compact hybrid instrument consisting of a passive emulsion chamber and a thin active ionization calorimeter has been developed to study high energy cosmic ray spectra. The novel component of this instrument is a thin sampling calorimeter that employs small scintillating optical fibers to measure the energy of electromagnetic cascades produced by cosmic rays interacting in the instrument. A planar Cerenkov counter is used to measure the charge of the primary particles. A twenty two hour exposure on a high-altitude balloon was performed, and the results of the data analysis for the active chambers in the instrument are presented here. The energies are estimated from the amount of scintillation light produced at different depths in the calorimeter by the cascades. The scintillation signals were recorded with two image intensified CCD cameras coupled to the scintillating fibers that were arranged as a 10 layer (X,Y) hodoscope. The CCD images are also used to determine the trajectory of each cascade detected. The details of the methodology used in this energy analysis are described. An independent analysis of the cascade energy was made with the emulsion chamber for several events which were then used to provided an absolute energy calibration of the fiber calorimeter technique.
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