Which of the following is NOT a required component in the construction of a semiconductor radiation detector?

A vacuum tube is not a required component in the construction of a semiconductor radiation detector. Semiconductor radiation detectors primarily utilize a semiconductor crystal, such as silicon or germanium, to directly convert incoming radiation into electrical signals. These detectors often include an amplifier to boost the signal strength for analysis and may have a display screen for visualizing the results. The vacuum tube, traditionally used in early electronic devices, is largely obsolete in modern semiconductor technology, as semiconductors themselves facilitate the necessary processes without the need for a vacuum environment. Thus, vacuum tubes are not integral to the function or construction of contemporary semiconductor radiation detectors.