Device for Accurate Location of Events in Nuclear Emulsion

摘要

A scale with 100 μ fine divisions and 1000 μ coarse divisions is pressed into the emulsion by rolling a fine toothed wheel across the emulsion. The position of the fine division on a 10 by 10 rectangular grid reticle (whipple disk) can be recorded to within 1 μ accuracy. This permits quick repositioning of events and strips with 1 μ accuracy independent of the accuracy of the stage motion.