Abstract: An energy-resolving x-ray detector for soft x-rays produced by elements having atomic numbers ranging from 9 to 23 includes a charge-coupled integrated circuit radiation detector device having an array of collection regions in a parallel plurality of collection shift registers forming columns of the array; an output amplifier for sequentially amplifying and signalling the charges received by the collection shift register; and a row shift register connected between the collection shift registers and the output amplifier; and a clock circuit having a multi-phase column output connected for sequentially shifting charges between collection regions of the collection shift register and into the row shift register during continuous exposure of the array to incoming radiation, each of the charges received by the output amplifier being sequentially accumulated in each of the collection regions of one collection shift register in response to the radiation, the clock circuit also having a multi-phase row output connecte

Abstract: A probe holder for a rotary scanner, the probe holder having a shaft and a plate rotatably mounted to the shaft. A parallelogram arrangement comprising a probe support on one side for holding a probe, an annular counterweight on an opposite side and a pair of levers therebetween secured to the plate. A spring mechanism in the annular counterweight moves the probe radially inwardly into contact with a pipe to be measured. A pair of spring-biased arms for contacting the pipe and centering the probe on the pipe are mounted to one end of the plate. A second counterweight is secured to the other end of the plate to counterbalance the contact arms.