Transcript Test Beam plans, software and simulation needs

LC Calorimeter Testbeam Requirements
S. Magill, A. Turcot, J. Yu
Sufficient data for Energy Flow algorithm development
Provide data for calorimeter tracking algorithms 
Help setting MIP threshold
Test feasibility for various detector technologies
Investigate the effects of incident angles and sampling ratio
Construct shower library based on Testbeam shower
Investigate magnetic field effect to Energy Flow Algorithm
E-flow Test Beam Requirements
Development of HCAL relies on simulation for EFA applications
Simulations need to be verified in test beam at shower level
Ultimate goal is jet energy/particle mass resolution - not possible in
test beam?
So, since EFAs require separation/id of photons, charged hadrons, and
neutrals Verify photon shower shape in ECAL prototype (Si/W with fine
granularity - 1X1 cm**2 or better)
Verify pion shower probability in ECAL as function of longitudinal
layer
Verify pion shower shapes in ECAL/HCAL prototype (must be able
to contain the hadron shower both transverse and longitudinally –
see plot)
Try to get beams with particle energies as in Z jets from e+e- -> ZZ at
500 GeV ->
e+e- -> ZZ @ 500 GeV
Energy (GeV)
Energy (GeV)
Energy (GeV)
Shower Radius (black) Ampl. Fraction (red)
3 GeV e- in SD Cal
From N. Graf’s 2D gaussian fit
70% of e- energy in layers 3-9
Layer
Shower Radius (red) Ampl. Fraction (blue)
10 GeV - in SD Cal
80 cm X 80 cm
X 34 layer HCAL
20 cm X 20 cm
X 30 layer ECAL
Need all 34 layers
Layer
Summary of E-Flow TB requirements
Geometry :
Need a test beam geometry and G4 simulation package for
JAS?/ROOT? with no field - 20X20 cm**2 ECAL and at least
80X80 cm**2 HCAL
Number of Channels :
If ECAL segmentation is 5 mm X 5 mm, then number of ECAL
channels is 48000!
If HCAL segmentation is 1 cm X 1 cm, then number of HCAL
channels is 220000!!!
2
X2
54000
3
X3
25000 similar to NIU
4
X4
14000
Total number of channels – 75K -> 250K!
Requirements for TB Facility :
1. An independent hall that can be interlocked for hadron runs.
2. A crane that can handle sufficiently large weights for absorber
plate assembly and manipulation of the assembled
modules. (20ton?)
3. Beam line with the following conditions:
a. Electron and photon beam
b. Pion and other hadron beam
c. Energies of EM and Hadrons: 5 - 150 ~ 250 GeV (If possible
as low energies as possible, down to1~2GeV)
d. Muon beam at energies 1-100 GeV or so ==> This is for
calorimeter tracking algorithm studies.
e. Beam line equipped with rotating dipoles that can let us
position beam as we want.
Detector Requirements :
• Tracking needed?
• Magnet to mimic central magnetic field
• Absorber plates that have adjustable gaps and adjustable absorber
thickness
• Interchangeable sensitive gap
• Ability to change the incident angle
• Sufficient number of readout channels
Studies Needed :
1. Mimicking neutrons with protons
2. Detector sizes
3. Study of LC jet characteristics, such as energy distribution of
hadron in the jets, for various CMS energies  Do we need to
contain the entire shower energy?
4. Cross check of MC’s to verify the longitudinal energy profile of
single particles
Software Needs :
1. Analysis software capable of dealing with TB geometry
2. Simulation of the TB geometry
3. Online monitoring
4. Slow control monitoring
5. Data and code management
Questions :
• When do we run TB? Late 2005 or early 2006?
• How long do we run?
• Where do we run?