Dr. Andy Liu
Many methods used to calculate x-ray flux are incapable of accounting for the high x-ray flux generated by modern x-ray machines. The most common method utilized today for monitoring x-ray dose rate in real time, by ionizing gas chambers, is usable for modern devices but is technically complex. The construction of a gas chamber is not a simple task, and its large size necessitates gas tubing, high voltages, signal cables, and other specialized parts and services to operate. The ionization approach is impractical for certain applications, such as when radiation dose must be measured in confined spaces. Advances in the technology of silicon PIN diodes in the datacom and telecom industries allow for the development of an inexpensive and compact solid-state ionizing sensor to calculate x-ray flux. As x-ray photons flux through the diodes, the photoelectric effect produces a photocurrent (1). The x-ray flux can be determined from this current, and once the former is known the radiation dose can be calculated from it.
Engaged Learning 2014, x-ray detector, silicon PIN diode, circuit
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Abramovitch, Joshua, "Development of a Silicon PIN Diode X-Ray Detector" (2014). Collection of Engaged Learning. 32.