Effect of oriented crystalline converter temperature on spectrometer response

Cooling of a 1-mm crystalline tungsten converter oriented along the 〈111〉 axis situated in front of an electromagnetic spectrometer of thickness 25 X 0 , recording showers of 28-GeV electrons, to a temperature of 77 K results in a decrease of the crystal radiation length by ∼30%, shifts the cascade curve of the shower development in the spectrometer by ∼7%, and improves the spectrometer energy resolution by ∼5% in comparison with similar parameters of the spectrometer at a crystal temperature of 293 K.