Diffractometry time-analysis

This technique is still too new to have an agreed-on name, but perhaps time-analysis diffractometry is appropriate. The instrument itself has been aptly called an electronic powder camera by the manufacturer [7.23]. 

It is fast. All the points on the diffraction-line profile are measured simultaneously and stored as /, 29 data in an MCA, as in time-analysis diffractometry (Sec. 7-10). A minicomputer then establishes the line centers for i/r = 0 and 45° by least-squares parabola fitting, computes the stress, and displays it. Stress can be measured with a standard deviation of about 5 ksi in 20 seconds or less, depending on line width. 

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