Device for automatic measurement of dose fields

A device is developed for measuring the dose characteristics of charged particle beams. Semiconductor diodes having sensitive volume from 0.1 to 10 mm3 are used as detectors. Electromechanical construction provides detector displacement in water or air medium in three perpendicular directions independently by computer or in hand regime. Coordinate measuring was made in a digital manner using the method of sequential calculation. Accuracy of calculating the location of transducer in any of three directions is 0.2 mm, limits and measuring time along X and Y axes were 0-250 mm in 60 and 80 s, along Z axis - 0-160 mm in 6 min. The detector and monitor reading values are introduced into computer on each cycle of accelerator work and normalized by program manager. The program was created for constructing the isodose maps over the results of measuring the relative dose values in the given points of medium. 4 refs.; 7 figs