Apparatus for sensing ionic current
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 2017
Grant Date -
Oct 1, 2015
app pub date -
Oct 30, 2013
filing date -
Oct 30, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a charged particle sensor (10) for detecting and measuring ionic current generated by charged particles resulting from ionization processes, comprising: a housing (16), a detection electrode (14) enclosed within the housing for collecting the charged particles, and an electrometer (12) having an input connected to the detection electrode for receiving a DC input signal therefrom and an output (18) for supplying a DC measurement signal as output. The housing comprises an electrostatic screen (16) for screening the detection electrode from external electric fields, whereby to reduce the sensitivity of the detection electrode to such fields. The electrostatic screen includes an electrically conducting screening sheet (26) provided as a second electrode facing the detection electrode and formed with interstices to allow the entry of radiation into the housing, and the second electrode and the detection electrode are arranged to be maintained in use at a bias voltage with respect to one another so as to effect charge separation amongst charged particles resulting from ionization processes and thereby produce an ionic current impinging on the detection electrode.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully