Inspection Method for Detection of Defects in Sewage Pipes Renewed by Sewage Pipe Renewal Method

Abstract

It is demonstrated that runaway of electrons in polar semiconductors in a strong magnetic field H begins when the value of the total electric field E:: exceeds the critical value E& for which an electron velocity in crossed fields is given by rc = C Et0,:H = +(,I2l)ro (ca = (2tiw,/m*)1'2 is an electron velocity at an optical phonon energy). This result was found on the basis of experimental investigations of avalanche breakdown in n-lnbb.