1. Computing production Need for detector studies
F.Forti
Dec 3, 2009
Note: list compiled with little input. Please do comment

2. Shopping list for 2010 productions
Purpose
Establish quantitative basis for TDR detector design/choices
Specific detector studies
Dedicated optimization studies (“private”)
Need access to computing resources
Background runs (centralized, at least in part)
Pair production
Touchek background
Radiative Bhabhas (a.k.a. beam-strahlung, deprecated)
Beam gas
(synchrotron radiation ?)
Neutron flux
Backround frame superposition
Especially important for EMC
Overall detector geometry optimization
High statistics runs (centralized)
Mainly for veto-mode devices in rare decays analysis
Forward PID, Backward EMC
Medium/Low statistics runs (centralized or not, depending on size)
Internal geometry of sub-detectors (SVT layers, IFR iron)
Details of interfaces (DCH length, radius)
Background frame superposition
Needed on the centralized runs ?
Possible ?

3. Medium/Low statistics runs
SVT
about 50K ev for layer distribution optimization
med-stat runs with eg BRECO eff studies on two L0 options
DCH
(med-stat runs for length/cell optimization)
PID
(med-stat runs for forw PID optimization)
EMC
100K rad-bhabha + 100K bhabha for occupancy studies
IFR
K background mix for detector optimization, radiation hardness
ETD
Trigger studies ?
Geometries:
several geometries for each study is needed. Use baseline geometry for everything but the detector under study
physics channels vary. To be defined in detail
Size
what medium statistics means isn’t clear: my guess is 106 – 108 events.

4. Mauro in October

5. High statistics runs Why ? Number of geometries Size
(Mainly) Needed to study physics background in rare decays
Since no specific process can be singled out a huge event mix needs to be simulated
Number of geometries
Relevant sub-detectors in this game are
Backward EMC – can be inserted in baseline and turned off at analysis level to see the effect. (Almost) no effect on other subdetector
Forward PID – affects EMC and DCH. Study K veto increased coverage effect.
Two geometries should be enough:
With and without Forward PID.
Which kind of FPID: to be defined in TB, but most likely the thin TOF style device.
High stat run to assess FPID effect on physics.
Comparison with FARICH or other technology can be done in med-stat runs
Size
between 1 and 5 ab-1 are needed