Transient conductivity measurements with subnanosecond time resolution.
The parameters governing the response time of a system to follow transient changes of conductivity caused by short pulses of radiation are discussed, and designs for coaxial conductivity cells with parallel-plate electrodes to obtain subnanosecond time resolution are described. The performance of the system is evaluated using ionization pulses of 30-ps width. This yields values in agreement with theory: 95 ps for the rise time and 80 ps for the fall time with virtually no signal distortion. Ways to decrease these times further are discussed.
Beck
G
G
Hahn-Meitner-Institut für Kernforschung Berlin GmbH, Bereich Strahlenchemie, Glienicker Strasse 100, Federal Republic of Germany.