Limits to hardenability
Action of radiation on measuring systems

First of all, let's consider the case of image transmission by CCD camera, whose sensor technology is today very efficient from an optical point of view (resolution, sensitivity, power consumption), but very sensitive to radiation (withstand level of the order of 200 Gy).

Today, there is no commercial alternative to the CCD (charge-coupled device), apart from the use of conventional image-analyzer tubes (vidicon, plumbicon, etc.),...