Stress Errors Associated with Miniaturization of X-Ray Stress Analyzer

The problems caused by miniaturization of the goniometer are discussed from the viewpoint of the stress error caused by mis-setting of the specimen and misalignment of the collimator and detector for the Q assembly X-ray stress analyzer using a position sensitive detector. The stress errors were calculated using a model and a simulation method. It was found that they tend to increase with the decrease in goniometer radius and effective collimator length. Therefore, the minimum size of the analyzer was investigated for a given value of total error. In conclusion, it is believed that the size for the goniometer radius and the collimator effective length could possibly be optimized. An analyzer of the single exposure method was also studied and found sensitive to the misalignment of the collimator and detector, but not to specimen mis-setting for miniaturization.