1. SuperB EMC Computing Foreseen activities and software/computing needs
David Hitlin
SuperB Computing miniWorkshop
SLAC
December 7, 2007

2. The upgrade of the BABAR EMC for SuperB
The barrel CsI(Tl) array, the single most expensive component of BABAR, is carried over to SuperB
Barrel CsI(Tl) crystals unchanged, except for modification of digital filter
Extend rear barrel coverage
Possible PID system in front of forward endcap
Replace forward endcap with LYSO crystals
Add rear endcap “veto calorimeter” Pb/scintillator
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

3. The upgrade of the BABAR EMC for SuperB
The barrel CsI(Tl) array, the single most expensive component of BABAR, is carried over to SuperB
The preamp digital filter constants may have to be shortened
The rear housing can be extended to add three rings of CsI(Tl) crystals to improve solid angle coverage
Modify geometry in PRAVDA and, eventually, to MC and reconstruction code
Replace the CsI(Tl) forward endcap crystals with LYSO, which has a shorter Molière radius, shorter decay time and is much more radiation resistant
Better segmentation (perhaps three sets of rings, with 240, 200 and 160 crystals)
Optimize crystal configuration, study effect of wrapping and support structure material
Study effect of possible PID system in front of the endcap
Add new geometry to PRAVDA and, eventually, to MC and reconstruction code
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

4. The upgrade of the BABAR EMC for SuperB - continued
The rear solid angle coverage can be improved by adding a veto calorimeter in the rear, covering ~ mrad polar angles
This does not have to be (and indeed cannot be) a high resolution device
A segmented Pb/scintillating fiber device is a good choice
Optimize coverage and segmentation
Add rear endcap to PRAVDA and, eventually, to MC and reconstruction code
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

5. The LYSO beam test – computing needs
We are working towards a beam test of a section of the LYSO calorimeter in (early) 2009, with the aim of focusing the R&D effort
Computing needs
Optimize LYSO geometry
Optimize wrapping material and linearization of response
Study effect of material in front of calorimeter
Pattern recognition code in new geometry
Calibration
Analysis of beam test data
PRAVDA MC MC
GEANT MC
GEANT MC
It is urgent that we make it possible for non-BABARian SuperB collaborators to have access to PRAVDA and perhaps other software tools
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

6. EMC R&D computing needs – TDR phase
Optimize geometry (barrel extension, forward EC, rear EC) against a series of representative physics processes
Modes involving photons, missing energy, and for studying the efficacy of the forward PID, kaons or protons
Determine optimum parameters of the digital filter for the CsI(Tl) photodiode and LYSO APD readout systems
Requires the ability to mix background and physics MC events
Computing support for the engineering effort to design the mechanical stuctures and the preamp/DAQ systems
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

7. Request for the computing superB group related to the Perugia
Next three slides from Claudia Cecchi, Perugia
Request for the computing superB group related to the Perugia
plans for the EMC simulation activities.
Mainly two topics of interest:
- simulation of the endcap EMC inside the general detector simulation framework of the experiment
study of physics channels important for the endcap EMC performance (, B , BK(bar))
Claudia Cecchi
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

8. As of today we can only express interest but not say more in terms of time schedule/manpower/…
Perugia is involved also in test beam activities, test beam simulation and study of mechanical structure for EMC and we are very few people at the moment.
Not clear the situation of manpower in the near future ( except for 1 undergraduate student joining the group in January)
We would like to ask anyone who is interested in those two topics to let us know to identify a possible collaboration scheme. Alternatively, we could just select one of the two above mentioned topics.
Claudia Cecchi
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

9. Request for the computing group:
Seen what explained in the previous slide, at the moment we would just ask for a future access to the BaBar software (for the simulation it would not be necessary to start from scratch, the barrel of EMC will not change and part of the software could maybe be modified also for the endcap)
At the beginning of the activity we believe we have enough resources in terms of machines/disks/CPU to start without major problems.
Hope to clarify the situation asap.
Claudia Cecchi
David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007

10. David Hitlin SuperB Computing miniWorkshop Dec. 7, 2007