Post on 15-Jan-2016
transcript
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimetry-Arlington
Calorimetry Detector Study
Plans at Colorado
Uriel Nauenberg
for
The Colorado Group
The ALCPG Meeting
May 12, 2003
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Scintillator Geometry
x-y view z view
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Fiber Placement
Light Correction
Light Correction
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Energy Leakage
30 Layers 35 Layers
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Energy Leakage
40 Layers 45 Layers
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Variations in Energy leakage
30 Layers 45 layers
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter Simulation
Calorimeter Energy Resolution2 mm scint., 1.75 mm W, 1 mm space
30 Layers 35 Layers
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter Simulation
Calorimeter Energy Resolution2 mm scint., 1.75 mm W, 1 mm space
40 Layers 45Layers
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter Simulation
Calorimeter Energy Resolution1.75 mm W, 1 mm space
1mm scint. 2 mm scint.45 LAYERS
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Photon Shower Radii 5 GeV 15 GeV
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Photon Shower Radii 50 GeV 75 GeV
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower Radius
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Method of Obtaining Space Point
Generate Showers with GEANT 4.0
Calculate Position =
x E Ei i
i
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Reconstruction of Position from Energy Sharing
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Position Resolution when Tiles are Offset
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Tiles not offset Tiles offset
About 1.5 cm from edge
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Spatial Resolution Near Center of Tile
Tiles not offset Tiles offset
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Position Resolution Using Forty Layers
5 cm tiles
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Resolution in the track slope near center of tile
Tiles Not Offset Tiles Offset
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Shower
Tile Areas of Simulation
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Photon Showers
Resolution
3 layers read together 5 layers read together40 layers total
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter-ALCPG
We have built a cosmic ray telescope7.6x7.6 cm
Plan to use 1.3 GeV Muons
Plan to Study
Light Collection Efficiency for a straight fiber
versus a curved fiber using Tyvek and using
3M Super Reflector as a function of the distance
from the fiber.
2
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter-ALCPG
Plan to Study
Fiber Readout with Avalanche PhotoDiodes;study voltage stability, temperature stability;light loss versus fiber length.
Study uniformity of response of variousphotodiodes.
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter-ALCPG
Cosmic Ray rate observed in Boulder is 2
per cm per minute which is twice the expected rate at sea level.
We would like to build a calorimeter module to study the content of the cosmic rays at Boulder’s altitude while testing our concept of spatial resolution and while waiting for beam availability.
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NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
Calorimeter Test Stand
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder
NLC – The Next Linear Collider Project
Colorado Univ. - Boulder