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First look at data from Run 55, G106a iZIPv6 with internal Pb210 source

Retriggering

Phonon Amplitude versus Event Number, four different channels
Optimal Filter amplitude Integral amplitude
around 3 seconds of data (99 events) taken on 2015 December 8 16:40
OR trigger on all phonon channels, no pileup elimination
Phonon Amplitude versus Event Number, four different channels
Optimal Filter amplitude Integral amplitude
around 3 seconds of data (99 events) taken on 2015 December 14 17:50
trigger on a single phonon channel, pileup threshold 0.1 ms

Note that in both cases above the recorded event rate is about 30 Hz.

Charge plots

  • Qinner and Qinner-chisquare cuts applied
  • Side 1 Qinner calibrated to 511 keV line
  • Side 2 Qinner calibrated to Side 1 Qinner
Side 2 Qinner versus Side 1 Qinner
Lead-210 events apparent: alphas at ~1500 keV (charge asymmetric), 46 keV gammas
Charge spectra
Ambient radiation lines seen: 511keV, 1.4keV (potassium), 2.6MeV (thorium). Not quite visible on Side 2.
Looks like the Side 2 calibration may be a little too high

Phonon and Yield plots

Yield versus Energy plots
Yield versus Energy and Charge Z Partition versus Energy up to high energies