Author/Authors :
Alietti، نويسنده , , M. and Berluti، نويسنده , , L. and Canali، نويسنده , , C. and Castaldini، نويسنده , , A. and Cavallini، نويسنده , , A. and Cetronio، نويسنده , , A. and DʹAuria، نويسنده , , S. and del Papa، نويسنده , , C. and Lanzieri، نويسنده , , C. and Nava، نويسنده , , F. and Proia، نويسنده , , M. and Rinaldi، نويسنده , , P. and Zichichi، نويسنده , , A.، نويسنده ,
Abstract :
In a recent paper, it was described how semi-insulating (SI) liquid encapsulated Czochralski (LEC) gallium arsenide particle detectors made by Alenia SpA have been tested and found to be understandable in terms of one function: the local charge collection efficiency. We have now measured, always within the context of the RD8 experiment, the local charge collection efficiency for these diodes using a technique called OBIC (optical beam induced current) and derived the active region width (W) as a function of bias in a range of values lower than those obtainable with particles. Using data both from OBIC and from the previous paper, W is found to behave approximately linearly as a function of bias larger than about 50 V. Below this value, W follows a square root law as a function of bias.
