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
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 Resolution 2 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 Resolution 2 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 Resolution 1.75 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 E i 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 together 40 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 various photodiodes.
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. 2
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