[Halld-tracking-hw] new fADC results

Naomi Jarvis nsj at cmu.edu
Thu Apr 7 11:45:47 EDT 2011


Hi Fernando,

I am still working on the new fADC cosmics results, as I go I am putting
histograms onto this page:

http://www.jlab.org/Hall-D/software/wiki/index.php/New_fADC_with_cosmics

It turns out that the gain is a fair bit lower than for the previous
setup... so the dynamic range is just great, but we might need to move the
cosmics peak up a little to make sure that it clears the noise.  The
prototype is fine but the big CDC will probably be noisier.  I wanted to
give you a heads up now that we might need you to change the scaling
factor on the modified HVB.  We still need to think about this a bit more.

Can you remind me what was the factor that the HVB modification scaled the
amplitude by please?

Thanks,

Naomi.



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