Author/Authors :
Biebel، نويسنده , , O. and Braibant، نويسنده , , S. M. de Jong and A. P. J. de Roo، نويسنده , , S.J. and Hammarstrِm، نويسنده , , R. and Hilgers، نويسنده , , R. and Honma، نويسنده , , A.K. and Jovanovic، نويسنده , , P. and Lauber، نويسنده , , J.A. and Neal، نويسنده , , H.A.، نويسنده ,
Abstract :
The radiation monitoring and beam dump system of the OPAL silicon microvertex detector is described. This system was designed and implemented to measure the radiation dose over time scales varying from a millisecond to a year, and to induce a fast beam dump if the radiation exceeds a given threshold in dose and in dose rate within a very small time interval. The system uses reverse-biased silicon diodes as sensitive elements and good stability is achieved by AC coupling of the amplifiers to the sensors.
