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Patricipants:
Strahlenbiologisches Institute der LMU
Schillerstrasse 42., D-80336 Münich, Germany
Contact person: Dr. A.M.Kellerer
Phone: +49 89 5996818
MicroVacuum Ltd.
Kerékgyártó u. 10., H-1147 Budapest, Hungary
Contact person: Dr. Katalin Erdélyi
Phone: +36 1 2521991
Objectives of the project:
In order to implement the variance-covariance
method into
radiation protection practice the development of specialized compact electronics was
required and this was the objective of the project.
Electronics had to be specifically designed for
variance-covariance measurements with multi-element, tissue-equivalent, proportional
counters, as they were developed within the main project FI+P+CT92-0039.
Result:
A
PORTABLE DEVICE FOR MICRODOSIMETRIC MEASUREMENTS
A portable, battery supplied, ergonomic electronic unit has
been developed for determination of the dose average lineal energy, yD, and the
dose equivalent, in terms of the variance-covariance method. The electronic unit is
suitable to use with great varieties of tissue equivalent proportional counters TEPC. The
device includes battery operated high voltage supply, two low noise and low offset
electrometers, two 20-bit resolution ADCs, and a microcontroller. The range of
applications is broad, including measurements at very high dose rate, pulsed fields of
different intensity, and fields with low dose rate. The device has been tested with
several different TEPCs.
This research was supported by EURATOM contract FI3P-CT
920039 and by PHARE TDQM contract HU-9305-02/1008; it is part of the co-operation within
EURADOS Working Group 10.
Related publications:
1.) A portable device for
microdosimetric measurements.
In Microdosimetry an Interdisciplinary Approach, ads. D.
Goodhead, P. O’ Neill and
H. G.Menzel, p. 353, Royal Society on Chemistry, 1997.
I.Almási, E.Anachkova, T.Bartha, Dr. Katalin Erdélyi, A.M.Kellerer
and H.Roos
2.) A portable instrument
based on variance-covariance technique for measurement in pulsed radiation fields
I.Almási, E.Anachkova, T.Bartha, Dr. Katalin Erdélyi, A.M.Kellerer
and H.Roos
The IRPA Regional Symposium on Radiation Protection in
Neighbouring Countries of Central Europe, September. 8-12.1997.
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