On the optimal frequency of observation of Cherenkov radiation in the radio astronomy method for measuring superhigh-energy cosmic-ray particle flux

Abstract

Possible reasons for the absence of direct observations of individual events in measuring the super-high-energy particle flux by the radio astronomy technique are considered. One of these reasons is probably associated with the choice of extremely high frequencies (∼1.5 GHz) for detecting radio pulses. Calculations show that the radiation intensity attains its peak value at frequencies ∼500–600 MHz and then sharply decreases so that it becomes three orders of magnitude lower even at a frequency of ∼1.5 GHz. The effectiveness of particle detection in the range of high (∼600 MHz) and low (∼60 MHz) frequencies is analyzed.