Manthos wrote:
> hello!i am trying to find a programm in labview that takes as an input
> the signal-pulse from a NaI detector and gives as an output its
> spectrum in a diagram counts/channel.the detector has 1024 channels
> and its higher voltage is 8 volts.if anyone can help i would be
> grateful!thank you
Manthos,
Are you trying to implement an MCA (Multi-Channel Analyzer)? If so,
what hardware are you considering. Depending on the speed and frequency
of your signals, you could put something together with an NI board. Do
double-buffered continuous acquisition, look for peaks, analyze their
height, and bin them all in software. However, if your signals are too
fast or frequent, this can become difficult to keep up with. I have
used the TrumpPCI card from Ortec (bought by Perkin-Elmer, now possibly
known as Ametek) for this. We are looking at peaks several
micro-seconds wide, with thousands per second, roughly. The TrumpPCI
comes with an ActiveX interface and dlls, either of which can be used in
LabVIEW.
Another fun but expensive way to go may be to use NI's RIO hardware,
but I'm guessing that the A/D wouldn't be fast enough for you. (It's
not quite fast enough for our application.) But in that case, you can
program your own hardware to do the peak detection and binning right in
the hardware.
Regards,
Dave
-------------------------------------------------------------
David Thomson 303-499-1973 (voice and fax)
Original Code Consulting dthomson@originalcode.com
www.originalcode.com
National Instruments Alliance Program Member
Certified LabVIEW Developer
Certified Instrument Driver Developer
-------------------------------------------------------------
Research Scientist 303-497-3470 (voice)
NOAA Aeronomy Laboratory 303-497-5373 (fax)
Boulder, Colorado dthomson@al.noaa.gov
-------------------------------------------------------------
There are 10 kinds of people: those who understand binary,
and those who don't.
