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2013/06/29

1420 Fill N2 cold trap full.
Summary of data acquired last night:

+/-2.5 V bias

  • 07130628_2208
  • 07130628_2239
  • 07130628_2309
  • 07130628_2339
  • 07130629_0009
  • 07130629_0040
  • 07130629_0110
  • 07130629_0140
  • 07130629_0210
  • 07130629_0240
  • 07130629_0310
  • 07130629_0340
  • 07130629_0411
  • 07130629_0441
  • 07130629_0511
  • 07130629_0541

-/+2.5 V bias

  • 07130629_0611
  • 07130629_0641
  • 07130629_0712
  • 07130629_0742
  • 07130629_0812
  • 07130629_0842
  • 07130629_0912
  • 07130629_0942
  • 07130629_1012
  • 07130629_1043
  • 07130629_1113
  • 07130629_1143
  • 07130629_1213
  • 07130629_1243
  • 07130629_1313
  • 07130629_1343
1455 Commence data acquisition: flash for 5 minutes followed by 90 minutes cool-down; six series at +/-0.5 V bias followed by 6 series at -/+0.5 V; OR trigger on Qi channels only; DIB 1 trigger lowered to 32 ADC bins, DIB 2 trigger at 28 ADC bins; 10/0.1/20 minutes acquisition/flash/cool-down cycle.
DIB 2 Qi trace appears to have developed some oscillations when looking over larger trace lengths of 1.6384 ms. Resetting timing link had no effect. Hopefully will not affect run: doesn't appear to when looking at trace lengths of 0.4096 ms in DetectorReadout vi.
2335 Began L He transfer, 11.1%
+/- 2.5V
total exposure time: 120 minutes
trigger on Qi channels (DIB 1 trigger threshold increased to 34 ADC bins due to noisy baseline, DIB 2 trigger threshold remains unchanged at 28 ADC bins)

Am_241 and Pb_210 sources installed on side 2.

CUT DEFINITIONS:
thresh cut, Qsum > 0.00025 au where Qsum = Qi + Qo
Q_partition cut, .9 < Q_partition < 1.01
Chi_2, visual cut

Fig. 1: Q_partition histograms for side 1 and side 2, after tresh cut.
Fig. 2: Chi_2 histograms for side 1 and side 2, after thresh and Q_partition cuts.
Fig. 3: Qsum histogram, side 1, after thresh, Q_partition, and Chi_2 cuts.
Fig. 4: Qsum histogram, side 2, after thresh, Q_partition, and Chi_2 cuts.
Fig. 5: Qsum 1 vs. Qsum2 histograms

TOP LEFT PANEL: Qsum1 vs Qsum2, NO CUTS
TOP RIGHT PANEL: Qsum1 vs Qsum2, thresh cuts on both sides
BOTTOM LEFT PANEL: Qsum1 vs Qsum2, thresh and Q_partition cuts on both sides
BOTTOM RIGHT PANEL: Qsum1 vs Qsum2, thresh, Q_partition and Chi_2 cuts on both sides



-/+ 2.5V
total exposure time: 120 minutes
trigger on Qi channels (DIB 1 trigger threshold increased to 34 ADC bins due to noisy baseline, DIB 2 trigger threshold remains unchanged at 28 ADC bins)

Am_241 and Pb_210 sources installed on side 2.

CUT DEFINITIONS:
thresh cut, Qsum > 0.00025 au where Qsum = Qi + Qo
Q_partition cut, .9 < Q_partition < 1.01
Chi_2, visual cut

Fig. 1: Q_partition histograms for side 1 and side 2, after tresh cut.
Fig. 2: Chi_2 histograms for side 1 and side 2, after thresh and Q_partition cuts.
Fig. 3: Qsum histogram, side 1, after thresh, Q_partition, and Chi_2 cuts.
Fig. 4: Qsum histogram, side 2, after thresh, Q_partition, and Chi_2 cuts.
Fig. 5: Qsum 1 vs. Qsum2 histograms

TOP LEFT PANEL: Qsum1 vs Qsum2, NO CUTS
TOP RIGHT PANEL: Qsum1 vs Qsum2, thresh cuts on both sides
BOTTOM LEFT PANEL: Qsum1 vs Qsum2, thresh and Q_partition cuts on both sides
BOTTOM RIGHT PANEL: Qsum1 vs Qsum2, thresh, Q_partition and Chi_2 cuts on both sides