1 / 29

Update of analysis of technical run data

Update of analysis of technical run data. T. Spadaro. Outline: done and to do. Done in the past: block by block time resolution T0 correction per column of blocks muon clustering algorithm first studies of time correlation with other detectors Update :

beck
Download Presentation

Update of analysis of technical run data

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Update of analysis of technical run data T. Spadaro

  2. Outline: done and to do Done in the past: • block by block time resolution • T0 correction per column of blocks • muon clustering algorithm • first studies of time correlation with other detectors Update: • absolute time-zero correction block by block • Novel time reconstruction for LAV, analysis of hit topologies • Analysis of time distributions and LAV-CHOD correlation To do: • efficiency studies for photons Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  3. Study of hit categories on data Data of run 390: • 1 CHOD candidate and 1 Cedar candidate in time • 1 cluster on LKr in time + 1 additional LKr cluster close in space with CHOD hit • Occupancy of few % Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  4. Study of hit categories on data • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Data of run 390: • 1 CHOD candidate and 1 Cedar candidate in time • 1 cluster on LKr in time + 1 additional LKr cluster close in space with CHOD hit • Event selection aiming at enriching LAV content AnalyzeTDC hit pairs for Low and High threshold of the same physical channel Station 1 status High status Low Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  5. Study of hit categories on data • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Data of run 390: • 1 CHOD candidate and 1 Cedar candidate in time • 1 cluster on LKr in time + 1 additional LKr cluster close in space with CHOD hit • Event selection aiming at enriching LAV content AnalyzeTDC hit pairs for Low and High threshold of the same physical channel Station 2 status High status Low Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  6. Time correlation vs category: complete hits • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low Odd structure at negative and positive times, check if there are other hits for that channel in the same event Plot dTvsNToT(Low) ? dTleading(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  7. Check edge population for complete hits Station 1 status High dTleading(High-Low) (ns) status Low 1 2 3 4 1 2 3 4 1 2 3 4 NToT (Low) NToT (Low) NToT (Low) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  8. Leading-leading category • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low Both trailing edges lost due to HPTDC 5-ns dead time? Is there a contribution from the 3-time-slot acquisition window? Plot dTvsT(DAQ,Low) dTleading(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  9. Check DAQ effect for leading-leading category Station 1 status High status Low TCedar – Tleading(High) (ns) “physics” peak TCedar – Tleading(High) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  10. Check DAQ effect for leading-leading category TCedar (ns) Station 1 status High Tleading(High) (ns) status Low TCedar (ns) Complete Leading-leading Tleading(High) (ns) Tleading(High) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  11. Leading-leading time correlation • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low High-threshold trailing lost, due to HPTDC 5-ns dead time? If so, ToT of Low threshold should be smaller than that for complete hits: Plot vsToT(Low) dTleading(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  12. High threshold trailing missing High-threshold trailing lost, due to HPTDC 5-ns dead time? If so, ToT of Low threshold should be smaller than that for complete hits ToT(Low) (ns) ToT(Low) (ns) dTleading(High-Low) (ns) dTleading(High-Low) (ns) True, but not always, maybe a DAQ effect is present, too? Check it by plotting also vsTleading high Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  13. Leading-leading time correlation • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low Low-threshold trailing lost, due to DAQ window? Plot dTvsTrail(DAQ, High) dTleading(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  14. Leading-leading time correlation • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low Where are both leading times? Plot vsT(DAQ,Low) Plot vsNToT Plot vsNHit/event dTtrailing(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  15. Trailing-trailing time correlation Station 1 status High status Low TCedar – Ttrailing(Low) (ns) “physics” peak TCedar – Ttrailing(High) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  16. Leading-leading time correlation • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low High-threshold leading lost... ... configuration of low threshold is strange (Tr-Le) Check vsNToT(Low) Check vsT(DAQ,Tr, High) dTtrailing(High-Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  17. Leading-leading time correlation • Hit status definition: • 1: Tr-Tr 4: Le-Tr • 2: Tr-Le 5: Le (only hit) • 3: Le-Le 6: Tr (only hit) Correlate leading hit times Station 1 status High status Low dT(trailing High- leading Low) (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  18. Time calibration from muon run Run 392 (muon run), merged thanks to Giuseppe including LKr info minimal request: 1 CHOD candidate Use muon run for time calibration: rescale all of the LAV times by subtracting the LAV-CHOD time difference Use High-threshold hits, global time resolution < 1 ns Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  19. Time calibration from muon run Use Low-threshold hits, since there is no slewing correction: non-zero offset, ~ -3 ns (compatible with expectation: ~ Trise/2) resolution worse, ~ 2ns Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  20. Check LAV-CHOD correlation CHOD population comparing muon and kaon run muon run YCHOD (cm) XCHOD (cm) kaon run XCHOD (cm) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  21. Check CHOD-LAV alignment, muon run Check time and position correlation with respect to CHOD, Hi-thr a second peak 25-ns away, time-correlated muon run DT (ns) Df (rad) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  22. Check LAV-CHOD correlation Select main time peak, plot a.u. ratio N(CHOD&LAV)/N(CHOD) muon run YCHOD (cm) XCHOD (cm) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  23. Compare muon and kaon run Check time and f correlation with respect to CHOD, low-threshold second peak ~40 ns away from the main peak muon run Df (rad) DTCHOD-LAV(ns) kaon run Df (rad) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  24. Compare muon and kaon run Second peak enhanced in the kaon run and for the low threshold kaon run low threshold DTCHOD-LAV(ns) TLAV (ns) low threshold muon run TLAV (ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  25. Compare muon and kaon run Second peak enhanced in the kaon run and for the low threshold kaon run low threshold muon run high threshold DTCHOD-LAV(ns) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  26. Compare muon and kaon run Second peak related to real muons: reflection of a physics signal muon run high threshold 2 hits in station 1 1 hit in station 1, 1 hit in station 2 DTLAV-LAV (ns) DfLAV-LAV(mrad) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  27. Compare muon and kaon run Second peak appearance is channel dependent: check high threshold DTCHOD-LAV (ns) muon run Electronic channel of low threshold Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  28. Compare muon and kaon run Second peak appearance is channel dependent: check low threshold DTCHOD-LAV (ns) muon run low threshold Electronic channel of low threshold Update of analysis of Tech. run data - CERN - NA62 PVeto WG

  29. Conclusions and to-do Absolute time-zero correction block by block satisfactory • resolution < 1 ns on the entire LAV station A secondary channel-dependent reflection peak biased the time alignment: • maximum of event occupancy met when (part of) main peak and all of the secondary peak are sampled in the 75-ns DAQ window • main peak is partly cut  expect an effect on efficiency • effect of DAQ window has an impact on hit topologies LAV-CHOD correlation studied in muon runs • Second peak related to real muons: reflection of a physics signal • geometrical correlation to be validated with MC Final validation of LAV capability after optimization of HW setup will be done: • muon runs, using specific channels completely contained in the DAQ window • kaon runs, using photons (on going) Update of analysis of Tech. run data - CERN - NA62 PVeto WG

More Related