1. 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

2. 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 ->

3. e+e- -> 500 GeV
Energy (GeV)
Energy (GeV)
Energy (GeV)

4. 3 GeV e- in SD Cal 70% of e- energy in layers 3-9
From N. Graf’s 2D gaussian fit
70% of e- energy in layers 3-9
Shower Radius (black) Ampl. Fraction (red)
Layer

5. 10 GeV - in SD Cal 80 cm X 80 cm X 34 layer HCAL
Shower Radius (red) Ampl. Fraction (blue)
20 cm X 20 cm
X 30 layer ECAL
Need all 34 layers
Layer

6. 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 !!!
2 X
3 X similar to NIU
4 X
Total number of channels – 75K -> 250K!

7. Requirements for TB Facility :
An independent hall that can be interlocked for hadron runs.
A crane that can handle sufficiently large weights for absorber plate assembly and manipulation of the assembled modules.  (20ton?)
Beam line with the following conditions:
Electron and photon beam
Pion and other hadron beam
Energies of EM and Hadrons: ~ 250 GeV (If possible as low energies as possible, down to1~2GeV)
Muon beam at energies GeV or so ==> This is for calorimeter tracking algorithm studies.
Beam line equipped with rotating dipoles that can let us position beam as we want.

8. Detector Requirements :
Detector needs:
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 :
Mimicking neutrons with protons
Detector sizes
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?
Cross check of MC’s to verify the longitudinal energy profile of single particles

9. Software Needs : Questions :
Analysis software capable of dealing with TB geometry
Simulation of the TB geometry
Online monitoring
Slow control monitoring
Data and code management
Questions :
When do we run TB? Late 2005 or early 2006?
How long do we run?
Where do we run?