MDN group,
We recently purchased a PI-Acton PI-MAX ICCD (Gen-2, RB-FG, 25-mm, 1024x256 elements), to use for detection of 200-800 nm fluorescence signals. To do this the ICCD intensifier is normally time-gated ("Gate" mode in the Winspec software) over the signal of interest to reject longer-lived background.
I would have expected that the intensifier gain would be independent of gate width, e.g. over the 10-1000 ns region. Instead, we've found that the maximum gain (at the "255" setting in the software) decreases from about 200 (>2500 ns gate) to 25 (450 ns) to about unity (10 ns laser pulse scatter). The vendor doesn't seem to know what to make of this, unfortunately.
The lack of gain at small gates is a problem. Does anyone have similar experience with a PI-Acton unit?
Jim
___________________________________________________
Dr. James A. Dodd
Staff Scientist
Air Force Research Laboratory / RVBYM
29 Randolph Road
Hanscom AFB, MA 01731-3010
Phone 781-377-4190
E-mail [log in to unmask] <mailto:[log in to unmask]>
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