I have an eight FEE64 system now in place on the LYCCA chamber with a PB-5 pulser going into the adapter cards test input. The test capacitor is 30pF.
I was going to explore the effect of the thresholds on the pulser peak.
I notice that the spectra look like those taken in RIKEN and not a single peak. In the 1GeV range I would interpret this as noise but since this is such a high energy i don't quite understand what is happening in the ASIC.
I thought i would share it with you.
PB-5 input to 50R is 10v with no attenuation. Signal height on the inline 'scope is +5.2v
ASICs are set to "default" with 1GeV range and 3uS shaping time.
Let me know if anything useful can be gleaned by more tests on LYCCA. |