1 / 9

CHOD digitization: Preliminary ideas

CHOD digitization: Preliminary ideas. Viacheslav Duk INFN Perugia. 1. Current digitizaion. Energy deposit in a slab > 2MeV No time information. CHOD hit. Possible improvement: Add time Add TOT. Use TR data. 2. Old CHOD channel map. V-plane. H-plane. y. x. 3. Adding time.

lan
Télécharger la présentation

CHOD digitization: Preliminary ideas

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. V.Duk CHOD digitization: Preliminary ideas Viacheslav Duk INFN Perugia 1

  2. Current digitizaion V.Duk • Energy deposit in a slab > 2MeV • No time information CHOD hit • Possible improvement: • Add time • Add TOT Use TR data 2

  3. Old CHOD channel map V.Duk V-plane H-plane y x 3

  4. Adding time V.Duk • TR data (Run 390 – the best one): • Select slab #j (j=0−127) • Divide the slab #j into 16 intersection points (IP) • For each IPjj (jj=1−16) fit TIP−Tcedar (TIP – uncorrected time) by the gaussian (<TIP>, σ) • Fit <TIP> vsIPjj-coordinate (rIP) by the function F0 = kt*rIP + bt • Remember time function Ft = kt*rIP • Fit σvsrIP by Fσt = kσt*rIP + bσt <TIP> - average time for IPjj Subtract IP intrinsic resolution 5ns/m*0.09m/√12 ~ 0.13ns ??? • Digitization code: • Get MC track and calculate rIP • Calculate time Ft = k*rIP • Add smearing according to Fσt = kσt*rIP+ bσt 4

  5. Adding TOT V.Duk • TR data (Run 390 – the best one): • Select slab #j (j=0−127) • Divide the slab #j into 16 intersection points (IP) • For each IPjj (jj=1−16) fit TOT by the gaussian (<TOT>, σ) or take Mean and RMS • Fit <TOT> vsrIP by the function FTOT = kTOT*rIP + bTOT • Fit σvsrIP by FσTOT = kσTOT*rIP + bσTOT • CHOD digitization: • Get MC track and calculate rIP • Calculate time FTOT = kTOT*rIP + bTOT • Add smearing according to FσTOT = kσTOT*rIP + bσTOT 5

  6. Pictures for slab0 V.Duk TR Run 390 6

  7. Pictures for slab0 V.Duk T0 as a function of (IDX - 64) σ as a function of IDX red – without time corrections blue – with time corrections TOT as a function of IDX • Different slope because of different slab width • light propagation in the slab: 0.82ns/slab / 9.9cm/slab ~ 8ns/m (slightly overestimated because of slewing effect) • Worse resolution for small ID (statistics) • Worse resolution for large ID (light attenuation) • Hard to fit the dependence Take average value 7

  8. conclusions V.Duk • CHOD digitization should be improved • Possible improvement: to add time and TOT • TR data provide necessary information THANK YOU!!! 8

  9. V.Duk 9

More Related