Volume Scan 福田努 (Tsutomu Fukuda) Nagoya-univ.. Event Brick#CC/NC Stop Plate 179264151 20122 CC PL10 180277945 33540 CC PL56 178684089 36564 NC PL38 179351516.

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Presentation transcript:

Volume Scan 福田努 (Tsutomu Fukuda) Nagoya-univ.

Event Brick#CC/NC Stop Plate CC PL CC PL NC PL CC PL CC PL CC PL CC PL54 7 Event located at Nagoya Volume Scan

Volume Scan DATA set After location, Volume Scan. Volume Scan Area is 1cm x 1cm from VTX point. Scanning 5plates upper VTX Plate and 10plates below VTX Plate. VTX Plate 5plates 10plates 1cm

Scanning time (first 4event) Scanning time/PL ~ time of PLATE set/PL

Scanning time (later 3event) 1min I change stream of PLATE set → time of PLATE set → ~1min/PL

Penetrate cosmic ( Event Brick#36564 ) PL28,29,30 – PL41,42,43 : 155Trk/cm 2 (Nseg>9 -> BG=0) Angle distribution ( PL28 or 29 or 30 ) ~1cm About DATA quality

Efficiency ( Event Brick#36564 ) Reject low momentum Trks (top angle – bottom angle < 70mrad) 155Trks -> 132Trks Average of Fillfactor = Average of Efficiency = 0.80 (Tracking eff x Connection eff) Estimated total # of CR ~ 130/cm 2 (> ~ 500MeV/c)

Transportation alignment PL28,29,30 – PL41,42,43 : 334Trk/cm 2 (BG=0) Angle distribution (PL28 or 29 or 30) Efficiency Average of Fillfactor = Average of Efficiency = 0.59 (Tracking eff x Connection eff) Estimated total # of CR ~ 890/cm 2 (> ~ 500MeV/c) ( Event Brick#36564 )

Short Summary (1) Event Brick## of Scan Plates eff (ECC) # of CR ( /cm 2 ) eff( 輸送時 ) # of CR ( /cm 2 ) ( PL01-PL15 ) 0.82 ~ ~ ( PL46-PL57 ) 0.89 ~ ~ ( PL28-PL43 ) 0.80 ~ ~ ( PL37-PL52 ) 0.79 ~ ~ ( PL15-PL30 ) 0.80 ~ ~ ( PL36-PL51 ) ( PL44-PL57 ) 0.85 ~ ~1230

BG Trk rejection Virtual Erase Linklet Quality check BaseTrk Quality check

Virtual Erase Delete BaseTrk of Linklet in transportation. Trk in transportation is ~1000 本 /PL Rate of delete of trk at ECC alignment : ~ 0.2%

Linklet Quality check VPH sum of Linklet(4surface) Penetrate Trk VPH sum BG Trk VPH sum BG Trk; XXXOXXOXXX Chain Penetrate Trk Angle difference

BaseTrk Quality check Angle difference (MicroTrk Angle – BaseTrkAngle) vs VPHsum (2surface) penetrateTrkBG Trk Vertical axis ： (dax 1 ) 2 +(day 1 ) 2 +(dax 2 ) 2 +(day 2 ) 2 cut

Short Summary (2) Event Brick## of Scan Plates eff (ECC) Before BG rejection eff (ECC) After BG rejcetion #of BaseTrk/PL (after /before) ( PL01-PL15 ) / ( PL46-PL57 ) / ( PL28-PL43 ) / ( PL37-PL52 ) / ( PL15-PL30 ) / ( PL36-PL51 ) ( PL44-PL57 ) /15967

About Event There is PLATE ID Xray Mark in Scan Area. Efficiency~60%? → fail estimation of efficiency?? For Data quality check and BG rejection, we analyze much more detail about effect for Alignment. → now processing

Near Future About Volume Scan Area and time

VTX Analysis Scan stream Judgment ! ・ 1ry VTX ・ 2ry VTX ・ e-pair ・ Kink daughter 1cm Scan Level 1: VTX confirm Scan Level 2: Decay Search Volume (for momentum measurement) Scan Level 3: π 0 Search Volume ( ~3X 0 ) Stop Plate 5mm

Recent Scanning time 5mm x 5mm x 7plates /Event Ev Ev Sheet change

Reduction of Scanning time Decrease Scanning Area → (16cm 2 /16plate → 6.2cm 2 /14plate) Omit Surface recognition of start of Scanning → already process in SUTS-03. data quality is good. → Scanning time is reduced 30%. Both direction Scan → scanning time will be ½. → from now (Nakano-san) Scanning time : 6.2/16 x 0.7 x 0.5 x (390sec x 16plate) /60 ~ 14min Plate change time : 50sec x 14plate /60 ~ 12min Total : = 26min/event

Before vs After 0skip1skip2skip Reject 前 Reject 後 # of Chain# of Group efficiency Reject 前 Reject 後 Linklet Chain