DocumentCode :
849160
Title :
A Microprocessor Controlled on-Line Monitor with Computed Trip Points for Long Lived Alpha Emitters in Aerosols
Author :
McDowell, William P. ; Keefe, Donald J. ; Yule, Thomas J.
Author_Institution :
Argonne National Laboratory Argonne, Illinois 60439
Volume :
27
Issue :
1
fYear :
1980
Firstpage :
747
Lastpage :
751
Abstract :
A four-channel microprocessor-controlled alpha-particle monitor with trip levels computed from background and source activity levels has been designed and constructed. This instrument, intended for monitoring uranium and transuranic particles contained in aerosols, uses virtual impactors to collect the particles and to provide background separation. Alpha spectrometry is subsequently used to separate the desired isotopes. The microprocessor performs trip point calculations, controls 12 four-decade counters and 12 fourdecade liquid crystal displays. It also monitors trip input information from flow and pressure monitors, a key pad for operator input, and controls a small printer used for report generation. This article covers the hardware and software techniques used to implement the device and the theoretical aspects of calculating the sliding scale trip point.
Keywords :
Aerosols; Counting circuits; Instruments; Isotopes; Liquid crystal displays; Microprocessors; Monitoring; Pressure control; Printers; Spectroscopy;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.1980.4330921
Filename :
4330921
Link To Document :
بازگشت