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NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimetry-Arlington Calorimetry Detector Study Plans at Colorado Uriel Nauenberg for.

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Presentation on theme: "NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimetry-Arlington Calorimetry Detector Study Plans at Colorado Uriel Nauenberg for."— Presentation transcript:

1 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

2 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Scintillator Geometry x-y view z view

3 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Fiber Placement Light Correction

4 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Energy Leakage 30 Layers 35 Layers

5 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Energy Leakage 40 Layers 45 Layers

6 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Variations in Energy leakage 30 Layers 45 layers

7 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

8 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

9 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

10 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Photon Shower Radii 5 GeV 15 GeV

11 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Photon Shower Radii 50 GeV 75 GeV

12 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Radius

13 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

14 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Reconstruction of Position from Energy Sharing

15 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Position Resolution when Tiles are Offset

16 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Tiles not offset Tiles offset About 1.5 cm from edge

17 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Spatial Resolution Near Center of Tile Tiles not offset Tiles offset

18 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Position Resolution Using Forty Layers 5 cm tiles

19 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

20 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Tile Areas of Simulation

21 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers   Resolution 3 layers read together 5 layers read together 40 layers total

22 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

23 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.

24 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

25 NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimeter Test Stand

26 NLC – The Next Linear Collider Project Colorado Univ. - Boulder

27 NLC – The Next Linear Collider Project Colorado Univ. - Boulder

28 NLC – The Next Linear Collider Project Colorado Univ. - Boulder

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