Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Status of Barrel Crosstalk Analysis 2 definitions : Peak-to-peak : V'max/Vmax Under the peak : V'(Tmax)/Vmax where Vmax=V(Tmax) Short distance crosstalk Capacitive : Strip-strip : analysis presented at February LarWeek and March BP3C meeting Resistive Middle-Strip Inductive Middle-Middle / Middle-Back / Back-Back Pulsed strip Neighbour strip
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Reminder of Strip-Strip crosstalk analysis Run 8045 (HIGH Crates I10, I12, I13, I14, H04, H05, H13,H14, H15) Results in good agreement with October '01 Test Beam (Module 10) = 7.14 % (4.17 %) with peak-peak (under the peak) definition = 0.79 % (0.26 %) Pathological channels observed See Good uniformity along phi : eg. (phi rms)/(phi average) Strip->Neighbour Strip (Peak-Peak def) Strip->Next to Neighbour Strip (Peak-Peak def)
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd ADC to MeV conversion All results here are with amplitudes in MeV For comparison with previous analyses (Many thanks to Fabrice Hubaut) And because MeV are the physical quantities. Gain factors for amplitude conversion from ADC to MeV are provided by ADC2MeVTool (with the help of Guillaume Unal) This software modification is fully compatible with previous jobOptions. Ratio of gain factors (from ATL- LARG )
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Resistive crosstalk : Middle to Strip Resistive crosstalk : Peak-to-Peak and Under- the-Peak definitions are equivalent Here Peak-Peak definition used But Middle to strip crosstalk not purely resistive. Previous analyses substract the long distance crosstalk I estimate correction factors for comparison Run 8045 Barrel C
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Inductive crosstalk : Middle to Middle Run 8045 Barrel C
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Inductive crosstalk : Middle to Back Run 8045 Barrel C
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Inductive crosstalk : Back to Back Run 8045 Barrel C
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Inductive crosstalk : Summary Good agreement with peak-peak crosstalk definition Some differences with Under the Peak definition, but so far a fixed value is used for Tmax Software improvement will come
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Pathological channels Run 8045 (HIGH Crates I10, I12, I13, I14, H04, H05, H13,H14, H15) Barrel C H5R, M0 (FT7, Slot 11) – chan 1,3,8,10,17,19,24,26 Problem with a calibration line ? Already seen by Guillaume H13L, M2 (FT24, Slot 13) – chan 82 Get amplitude of ~20 ADC when pulsed, but its crosstalk is normal Already seen by Lydia H13R, B0 (FT23, Slot 9) – chan 72 No signal, even when not pulsed Already seen by Lydia and Guillaume Barrel A I12L (FT22) Important crosstalk (~15%) between M3 chan 55 and B1 chan 107 Even when none of the two is pulsed Chan 82 pulsed Chan 72, ieta =2 Chan 64, ieta =0 Chan 68, ieta =1 pulsed The middle cell The back cell The middle cell (pulsed) The back cell
Julien Labbé - Status of Barrel Crosstalk Analysis - Barrel P3C meeting, Thursday May 3rd Conclusion Summary : Crosstalk analysis complete for the run 8045 (9 Crates) Capacitive : Strip to Neighbour and Strip to Next to Neighbour Resistive : Middle to Strip Inductive : Middle and Back layers Software improvement : Implementation of peak detection I will see this with Renat (Endcap) Preparation of the full barrel analysis I added a cut on the wave reconstruction to minimize the used memory.