01665naa a2200217 a 450000100080000000500110000800800410001910000200006024501120008026000090019250000200020152009550022165300130117665300140118965300130120365300200121665300140123665300110125070000200126177301660128110268322010-03-03       1994    bl ---       0--  u    #d1 aCRUVINEL, P. E.  aDesign of an electronic system for radiation dosimetry using electrets based on a AMD80535 microcontroller.  c1994  aResumo. Ref.35.  aAn electret dosimeter with a cylindrical active volume was introduced by Mascarenhas et al [Topics Appl. Phys. 33(1987) 321] for possible use in personnel and area monitoring. For similar dimensions to those of the common pen dosimeter, the electret has both a total surface charge of the order of 10E-9 C and a readout sensitivity of the order of 10E-5 Gy with a useful range of 5x10E-2 Gy. In this work is presented the design of an electronic system based on a AMD80535 microcontroller to measure both X and gamma-rays dose with a cylindrical electret ionization chamber. The versatility obtained with the use of intelligent instrumentation showed several advantages in applications when there are hazard to the operators. Results showed the reliability of the board as well as with the use of this particular microcontroller it is possible to obtain a simple hardware implementation concerning to dedicated controllers and data collector systems.  aAMD80535  aDosimeter  aElectret  aMicrocontroller  aRadiation  aSystem1 aMASCARENHAS, S.  tIn: INTERNATIONAL SYMPOSIUM ON ELECTRETS-ISE8, 8., Sept. 1994, Paris, Franca,. Programme... Paris: Ecole Superieure de Physique et de Chimie Industrielles, 1994.