Referenced Items are not available for this document.
The performance of a complete pressurized ion chamber (PIC) radiation monitoring system is described. The design incorporates an improved temperature-compensated electrometer which is stable to ±3·10-16 A over the environmental range of temperature (-40 to +40°C). Using a single 10-11Ω feed-back resistor, the electrometer accurately measures currents over a range from 3·10-15 A to 3·10-11 A. While retaining the sensitivity of the original PIC system (the instrument responds readily to small background fluctuations on the order of 0.1 μR h-1), the new system measures radiation levels up to the point where the collection efficiency of the ion chamber begins to drop off, typically ~27 pA at 1 mRh-1. A data recorder and system controller was designed using the Tattletale Model 4A computer. Digital data is stored on removable solid-state, credit-card style memory cards
Published in:
Nuclear Science, IEEE Transactions on
(Volume:41
,
Issue:
4
)
Date of Publication: Aug 1994
- Page(s):
- 1080 - 1085
- ISSN :
- 0018-9499
- INSPEC Accession Number:
- 4780933
- Digital Object Identifier :
- 10.1109/23.322862
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Aug 1994
- Sponsored by :
- IEEE Nuclear and Plasma Sciences Society
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