Difference between revisions of "RF DeltaTs"
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+ | == Summary == | ||
+ | * Within each detector system, the shifted time differences between the different RF signals in the event are histogrammed. | ||
+ | * The hit # is not technically the Nth-hit in the event. Instead, it is calculated from the time. | ||
+ | ** For example, since the RF signal arrives every 2.004 ns and is read out 1/128 times, the second hit should be ~256.5 ns later than the first, the third ~513ns after the first, etc. Thus, the hit # is determined from the delta-t. This is because sometimes a hit is missing. | ||
+ | ** The time differences are shifted in time such that they SHOULD line up at zero. E.g. if 2nd hit - 1st hit: expect to be centered at ~256.5 ns. So ~256.5ns is subtracted from the distribution. | ||
+ | * Note that sometimes there are two hits that roughly ~76ns apart from each other. They are identified as being the same hit #. The time difference between these is shown on the diagonal of the time difference distribution plots. | ||
+ | ** This does not happen for the TOF (CAEN) only the other systems (F1TDCs). | ||
+ | ** The means/resolutions/etc. of these hits are not shown in the characteristics summary histograms, as their values tend to dominate the other bins. | ||
+ | |||
== TAGH == | == TAGH == | ||
+ | |||
+ | * Time difference distributions (columns: earlier hit, rows: later hit) | ||
+ | ** Diagonal: Hits with similar time | ||
[[Image:RFDeltaT_DeltaTs_TAGH.png|thumb|left|1200px|Delta-t's]] | [[Image:RFDeltaT_DeltaTs_TAGH.png|thumb|left|1200px|Delta-t's]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | * Time difference characteristics | ||
+ | ** Diagonal: Hits with similar time | ||
{| class="wikitable" | {| class="wikitable" | ||
| [[Image:RFDeltaT_Mean_TAGH.png|thumb|left|700px|Mean]] | | [[Image:RFDeltaT_Mean_TAGH.png|thumb|left|700px|Mean]] | ||
Line 13: | Line 27: | ||
== PSC == | == PSC == | ||
+ | * Time difference distributions (columns: earlier hit, rows: later hit) | ||
+ | ** Diagonal: Hits with similar time | ||
[[Image:RFDeltaT_DeltaTs_PSC.png|thumb|left|1200px|Delta-t's]] | [[Image:RFDeltaT_DeltaTs_PSC.png|thumb|left|1200px|Delta-t's]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | * Time difference characteristics | ||
{| class="wikitable" | {| class="wikitable" | ||
| [[Image:RFDeltaT_Mean_PSC.png|thumb|left|700px|Mean]] | | [[Image:RFDeltaT_Mean_PSC.png|thumb|left|700px|Mean]] | ||
Line 26: | Line 43: | ||
== FDC == | == FDC == | ||
+ | * Time difference distributions (columns: earlier hit, rows: later hit) | ||
+ | ** Diagonal: Hits with similar time | ||
[[Image:RFDeltaT_DeltaTs_FDC.png|thumb|left|1200px|Delta-t's]] | [[Image:RFDeltaT_DeltaTs_FDC.png|thumb|left|1200px|Delta-t's]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | * Time difference characteristics | ||
{| class="wikitable" | {| class="wikitable" | ||
| [[Image:RFDeltaT_Mean_FDC.png|thumb|left|700px|Mean]] | | [[Image:RFDeltaT_Mean_FDC.png|thumb|left|700px|Mean]] | ||
Line 39: | Line 59: | ||
== TOF == | == TOF == | ||
+ | * Time difference distributions (columns: earlier hit, rows: later hit) | ||
+ | ** Diagonal: Hits with similar time | ||
[[Image:RFDeltaT_DeltaTs_TOF.png|thumb|left|1200px|Delta-t's]] | [[Image:RFDeltaT_DeltaTs_TOF.png|thumb|left|1200px|Delta-t's]] | ||
<br style="clear:both;"/> | <br style="clear:both;"/> | ||
+ | * Time difference characteristics | ||
{| class="wikitable" | {| class="wikitable" | ||
| [[Image:RFDeltaT_Mean_TOF.png|thumb|left|700px|Mean]] | | [[Image:RFDeltaT_Mean_TOF.png|thumb|left|700px|Mean]] |
Revision as of 14:25, 24 March 2016
Summary
- Within each detector system, the shifted time differences between the different RF signals in the event are histogrammed.
- The hit # is not technically the Nth-hit in the event. Instead, it is calculated from the time.
- For example, since the RF signal arrives every 2.004 ns and is read out 1/128 times, the second hit should be ~256.5 ns later than the first, the third ~513ns after the first, etc. Thus, the hit # is determined from the delta-t. This is because sometimes a hit is missing.
- The time differences are shifted in time such that they SHOULD line up at zero. E.g. if 2nd hit - 1st hit: expect to be centered at ~256.5 ns. So ~256.5ns is subtracted from the distribution.
- Note that sometimes there are two hits that roughly ~76ns apart from each other. They are identified as being the same hit #. The time difference between these is shown on the diagonal of the time difference distribution plots.
- This does not happen for the TOF (CAEN) only the other systems (F1TDCs).
- The means/resolutions/etc. of these hits are not shown in the characteristics summary histograms, as their values tend to dominate the other bins.
TAGH
- Time difference distributions (columns: earlier hit, rows: later hit)
- Diagonal: Hits with similar time
- Time difference characteristics
- Diagonal: Hits with similar time
PSC
- Time difference distributions (columns: earlier hit, rows: later hit)
- Diagonal: Hits with similar time
- Time difference characteristics
FDC
- Time difference distributions (columns: earlier hit, rows: later hit)
- Diagonal: Hits with similar time
- Time difference characteristics
TOF
- Time difference distributions (columns: earlier hit, rows: later hit)
- Diagonal: Hits with similar time
- Time difference characteristics