Status of Geant4 for SuperB

1
Status of Geant4 for SuperB

• A. Kibayashi
• June 11, 2007
• For Monday meeting

2
History

• Geant4 working team active 1 year (04-05)
• Basic gsim true hits done for each sub-detector
  
• Reports presented at
• Higher Luminosity Workshop(HL6)at KEK Nov., 2004
• SuperB workhsop in Hawaii, April 2005 (Background
  study by Tajima-san)
• Tracking
• Realistic hits

3
Super-Belle Detector
O.Tajima HL6
LoI Geometry
Barrel-KLM (RPC)
TOP
ECL
RICH
CDC
EndCap-KLM (sintillator)
SVD
4
Updated Geometry

• b20070607
• Added pxd for pixel detectors and sfbp.
• Standalone visualization still has problems

KLM
ECL
TOP
RICH
CDC
PXD
5
PXDsuperflat beam pipe pixel detectors
y
x

6
PXD geometry(b20070528)
Central super-flat beam pipe (Be)
(7x1x25)x2 Vacuum inside beam pipe
(5x0.5x25)x2 2 Silicon PXD detectors (Si)
(7x0.15x25)x2 Placed upper
lower of the SFBP
350x2
beam trapezoid(fwd) (Be)
(50x50)x2
beam trapezoid (bwd)
(7x1.15)x2
500x2
all units in mm
(50x50)x2
ToDo beam trapezoid is currently solid Be, need
vacuum inside
7
g4superb packagestatus
package gsim hits recon
kernel Katayama K
pxd Kibayashi K K L
svd KHaraKibayashi J J L
cdc YIwasakiKatayama J J J
top Inami K K K
rich Pestotnik J J K
ecl KrokovnyKatayama J K K
klm Piilonen J K K
solenoid ?
kekb/ir ?

• Gsimhit all detectors have enough info ready to
  pass to recon.
• Hits true hits, not realistic hits
• green means gt90 done, red means lt 90 done
• Katayama-san is working on digitization for all
  detectors.

8
Comments from People in Charge

• PXD (A.Kibayashi)
• geom, hits almost done (needs smearing)
• SVD (A.Kibayashi)
• geom hits done (cluster assumed as local
  position smeared) reconstructoin
• ToDo TRAK needs modification 3 month, check w/
  TRAKERR for PXDSVD
• CDC (Y.Iwasaki)
• geohits Done, Partially Done
• recon. Geometry and hit banks (Done by
  Katayama-san)
• TOP (K.Inami)
• geomhits. need to modify the geometry to the
  focusing type
• recon. high speed 3D image reconstruction
  algorithm
• need to consider about the dead space and the
  connection between TOP and endcap aerogel RICH
• RICH (R.Pestotnik)
• geometry 90 done, 2 months to finish (1st
  August)
• hits 95 ,2 months (1st August)
• reconstruction 0 in G4Belle (100 in standalone
  version), 3months (1 September)
• ECL (P.Krokovny)
• Datecl_hits filled, rececl_cf cluster finder
  works (by Katayama-san.)

9
Plan

• Meeting Fridays(biweekly) 3 pm _at_RM425
• First meeting on 6/15
• http//belle.kek.jp/atsukok/geant4
• Goal Have working recon. tools ready by fall
• Modification of TRAK
• PID into belle lib.
• Performance studies after that
• Join us!