Speaker
Mr
Rachad ALAMI
(National Center of Energy Sciences and Nuclear Techniques (CNESTEN), Morocco)
Description
In this paper, we propose the development of a new data logger system
for monitoring the radiation environment in situ of Morocco nuclear
studies centre.
This device is used to measure continuously the $\gamma$-dose rate for
plotting and monitoring ambient radioactivity, and equipped with an
alert system to alert the operator in cases which exceed the dose rate
threshold limits. It mainly consists of a high-pressure ionization
chamber whose response is directly proportional to the ionization
intensity created by the radiation.
This paper details the development stages of a radiation datalogger
which is associated to a specific monitoring interface for remote
measurement of ambient $\gamma$-radiation. It starts first with
studying the relationship between the dose rate and the output
ionization current of the HPIC chamber, followed secondly by the
development of digital processing unit for measuring and data
recording, and thirdly finishes with the development of a data
transfer module, using an XBee protocol of RF transmission, to the
host computer. In addition, this paper presents also new software
which is associated to the datalogger device, used as data acquisition
interface, and was designed and characterized by specific parameters
for real time remote monitoring of $\gamma$ ambient dosimetry.
In fact, environmental radiation dosimetry has been performed with a
high-pressure ionization chamber which supplies a current directly
proportional to the amount of the incident particles energy. The
output ionization current is of the order of $10^{-14}$ A/Gy/h per
cubic decimeter, equivalent to energy absorption of $10~\mu$J/h and
per gramme of the chamber material. This current is DC coupled first to
a preamplifier where it passes through a high ohmic resistance of
$10^{10}~\Omega$ to establish a difference of potential, and followed
by a negative feedback linear amplifier circuit.
The output of this amplifier is then connected to the electronic
module for digital data treatment and transmission to the acquisition
software installed into PC.
| Country/Organization invited to participate | Morocco |
|---|
Primary author
Mr
Aziz BENAHMED
(National Center of Energy Sciences and Nuclear Techniques (CNESTEN), Morocco)
Co-authors
Ms
Hajar elkarch
(National Center of Energy Sciences and Nuclear Techniques (CNESTEN), Morocco)
Mr
Rachad ALAMI
(National Center of Energy Sciences and Nuclear Techniques (CNESTEN), Morocco)
