The Photomagnetoelectric Effect in Mercury Iodide
In order to investigate the transport properties of mercury iodide, measurements of photomagnetoelectric (PME) effect and photoconductivity (PC) have been carried out. The experimental results show the presence of trapping phenomena and a strong dependence of carrier lifetimes on the light injection level. The obtained values of the lifetimes are in the range 10-7-10-6 s.
CHAPTER 4 - Electrical Properties of Mercuric Iodide
This chapter describes the electrical properties of red HgI 2 , particularly those important in using this material for x-ray and y-ray detector applications. The chapter discusses the relationship of carrier traps to fabrication processes and device performance, measurement techniques used to characterize the electrical properties of HgI 2 , and the theoretical background required to evaluate the data. Several techniques that have been extensively used to characterize HgI 2 crystals and detectors are discussed in detail. These techniques include current and charge transient measurements, thermally stimulated current (TSC), and photoconductivity. Two of the present challenges in HgI 2 sensor technology are to increase control of the detector fabrication processes and to modify the detector processing strategy in such a way to increase the manufacturing yield of high quality detectors.
DESIGN CONSIDERATION TO PPM KLYSTRONS FOR INDUSTRIAL LINAC
Toshiba has been developing the C-band and X-band Periodic Permanent Magnet (PPM) focused klystron in collaboration with KEK and manufactured prototypes for the JLC project. [1] The PPM klystron has an advantage to enhance the total efficiency as a result of eliminating the electric power for the focusing magnet. From experience on the development the PPM focused klystrons for the JLC project, we plan to apply the PPM focused klystron to the medical and industrial linac. The periodic magnet focusing scheme has some technical difficulties such as stop band voltage. To design the PPM klystron for the medical and industrial linac, it is necessary to give heed to electron beam instability; so that the tube parameters of the PPM focused klystrons have some constraints. The size of the accelerator system is substantially reduced if a PPM focused klystron is used. The majority of medical and industrial linacs use frequencies of S-band range. We discuss the availability of the S-band PPM focused klystron in this paper.