On the observation of Cerenkov images at large core distances in the EAS of ultrahigh energies

Abstract

A slit camera is suggested for observation of EAS images at large core distances R. Being incorporated in the network of EAS particle detectors with large separation between them ( km) the imaging cameras make possible the measurement of the angular distribution of light responsible for the image. Experimental angular light distribution helps to decode the EAS cascade curve from the image data. Analysis of the image data expected at large core distances shows that the early stage of the EAS development (depths in atmosphere ) could be studied. For this application the traditional Cerenkov detector data, the radiation lateral distribution and the pulse shape at large core distances are uncertain without knowledge of angular light distribution. The advantage of the slit camera array is also in its suppression of the direct moon light that makes the duty cycle of the Cerenkov array longer.