Skip to Content
Find More Like This
Return to Search

Ionization detector, electrode configuration and single polarity charge detection method

United States Patent

5,777,338
July 7, 1998
View the Complete Patent at the US Patent & Trademark Office
An ionization detector, an electrode configuration and a single polarity charge detection method each utilize a boundary electrode which symmetrically surrounds first and second central interlaced and symmetrical electrodes. All of the electrodes are held at a voltage potential of a first polarity type. The first central electrode is held at a higher potential than the second central or boundary electrodes. By forming the first and second central electrodes in a substantially interlaced and symmetrical pattern and forming the boundary electrode symmetrically about the first and second central electrodes, signals generated by charge carriers are substantially of equal strength with respect to both of the central electrodes. The only significant difference in measured signal strength occurs when the charge carriers move to within close proximity of the first central electrode and are received at the first central electrode. The measured signals are then subtracted and compared to quantitatively measure the magnitude of the charge.
He; Zhong (Ann Arbor, MI)
Regents of the University of Michigan (Ann Arbor, MI)
08/ 763,675
December 11, 1996
GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant to Contract No. DE-FG08-94NV11630 from the United States Department of Energy .