1.2.4. - Counting
You count photons using the
ct
macro.
Without arguments, this macro counts for the time
set by the variable
COUNT, which is typically one second.
According to the convention used in the standard macros,
positive count times indicate counting to seconds and
negative count times indicate counting to monitor counts.
1.FOURC> ct 10
Mon Feb 15 01:45:12 1994 Seconds = 10 Monitor = 389387 (38939/s) Detector = 192041 (19204/s) 2.FOURC> ct -40000
Mon Feb 15 01:45:28 1994 Seconds = 1.027 Monitor = 40000 (38948/s) Detector = 19756 (19237/s) 3.FOURC>
Type a
^C
to abort counting.
The macro
show_cnts will display the current scaler contents.
The
uct
macro will update the screen with the current scaler contents
during the counting period.