W. Rhode et al., DESIGN AND PERFORMANCE OF THE LEAD-CONCRETE GEIGER TOWER ARRAY WITHINTHE HEGRA EXPERIMENT, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 378(3), 1996, pp. 399-409
The HEGRA experiment is a hybrid installation characterized by four di
fferent types of detectors (scintillator counters, open Cherenkov coun
ters, Cherenkov telescopes and Geiger towers) located within one detec
tor array. The Geiger towers are built with the objective to measure t
he local energy deposition and to reconstruct and identify muon tracks
. In addition each tower may serve as an independent high resolution m
uon flux monitor, With these properties the Geiger towers are operatin
g as geometric and energetic calibration instruments for the other det
ector components and as additional independent measurement instruments
with respect to the gamma-hadron separation and the measurement of th
e chemical composition, In this paper the design, the performance, and
the basic principles of the data analysis of the lead-concrete Geiger
towers are described.