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 Arlington Meeting January 10, 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 Calorimeter Simulation Calorimeter Energy Resolution

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

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

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

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

9. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Shower Position Resolution when Tiles are not Offset

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

11. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Point Resolution Near Center of 5 cm Tile Tiles not offset Tiles offset

12. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Space Resolution within +-0.5 cm from the center (5 cm Tile) Tiles are not offset Tiles are offset

13. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Photon Showers Position Resolution within+- 1.0 cm of Center ofTile (5.0cm) Tiles are not offset Tiles are offset

14. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Resolution Improv. in 

15. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimeter-Arlington 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

16. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimeter-Arlington 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.

17. NLC – The Next Linear Collider Project Colorado Univ. - Boulder Calorimeter-Arlington 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 atBoulder’s altitude while testing our concept of spatial resolution and while waiting for beam availability. 2

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

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