Mean carrier transport properties and charge collection dynamics of single-crystal, natural type IIa diamonds from ion-induced conductivity measurements.

摘要

Ion-induced conductivity has been used to investigate the detector characteristics of diamond detectors. Both integrated-charge, and time-resolved current measurements were performed to examine the mean carrier transport properties of diamond and the dynamics of charge collection under highly-localized and high-density excitation conditions. The integrated-charge measurements were conducted with a standard pulse-counting system with ;A charge collection model was developed to interpret the integrated-charge measurements which enabled estimation of the energy required to produce an electron-hole pair (;The best fractional resolution resulting from any of the diamond detectors at the highest field (;The rise times of the current transients in the time-resolved current experiments were measured to be greater by about an order of magnitude as compared to the 18.6 ;We have developed a temporally- and spatially-dependent one-dimensional carrier transport model to interpret the time-resolved current measurements and to examine the dynamics of charge collection under the intense localized excitations that are represented by heavy ion-excitations. (Abstract shortened by UMI.).