Difference between revisions of "CDC time spikes"

Revision as of 17:09, 13 November 2012

Trigger signals

Scint and coinc logic signals, scope triggered on coinc (magenta)

Same, with TI busy signal (green)

Same, different timebase

Histograms of threshold-crossing bins in central bank of 16 straws, different thresholds (ignore the histo titles)

ADC-value=150 crossing (~approx ped + 5sigma)

3.5sigma crossing (approx ADC value 112 = (55 + 3x16.5))

ADC-value=100 crossing

Histograms of ADC value=100 threshold-crossing bins in individual straws (search started at bin 160)

ADC-value=100 crossing

Same data after more normal analysis

5sigma crossing

4sigma crossing

1sigma crossing

extrapolation to local pedestal crossing

drift time (ns)

@@ Line 18: / Line 18: @@
 {| border="0" cellpadding="2"
 |[[Image:run_31955_thr100_proto_xthr.png|thumb|x450px|ADC-value=100 crossing]]
+|}
+Same data after more normal analysis
+{| border="0" cellpadding="2"
+|[[Image:run_31955_track119_5sigx.png|thumb|x150px|5sigma crossing]]
+|[[Image:run_31955_track119_4sigx.png|thumb|x150px|4sigma crossing]]
+|[[Image:run_31955_track119_1sigx.png|thumb|x150px|1sigma crossing]]
+|}
+{| border="0" cellpadding="2"
+|[[Image:run_31955_track119_pedx.png|thumb|x150px|extrapolation to local pedestal crossing]]
+|[[Image:run_31955_track119_dt.png|thumb|x150px|drift time (ns)]]
 |}