1. 4/1/2002Manuel I. Martin Digital Hadronic Calorimeter Hardware Status

2. 4/1/2002Manuel I. Martin Progress to date: Made several Cell’s prototypes using 9mm and 19mm thick scintillator Made very preliminary comparative measurements of Light Output Reviewed five possible geometries for the WLSF positioning in the Cell Reviewed existing literature regarding materials and construction techniques for Scintillator Detectors Visited/talked with ‘experts’ on different fields related to Scintillator Detectors Technologies Created PERT charts to study possibilities open to us playing the game “what if”

3. 4/1/2002Manuel I. Martin Proposal for the future Clearly define:  Short Term Goals  Long Range Goals Organize Test Program Assess Requirements  Group Structure  Personnel Requirements  Material, Equipment, etc.  Miscellaneous Start Procurement

4. 4/1/2002Manuel I. Martin Project Development Use Management Tools Define Schedule Define Resources Create PERT chart : assign resources, define milestones, etc. Make Early Choices Review Options to Scintillator > WLSF > CF > Light to Charge Device Type of Scintillator, WLSF and Absorber Tower (Super-Tower) construction Define Parameters to be Optimized Cell Geometry Scintillator Material Grove Geometry

5. 4/1/2002Manuel I. Martin SHORT TERM GOAL Find a ‘feasible’, ‘optimal’ design of a DHC cell following the principles established in the Grant Proposal. SUBGOALS: Build a super-tower for test in beam line Design a minimum cost electronic packages consisting of Light to charge converter Amplifier-Discriminator

6. 4/1/2002Manuel I. Martin Early Choices Cell Geometry  Hexagonal base Prism Scintillator Material  BC-408, BC-428 (with CF) Absorber Material  Copper Fiber Material  WLSF >> BCF-92, Y-11 (Kuraray)  CF >> BCF-98, others? Fiber Geometry  Ø 1 mm (2 Ø.9 mm) mirror end.78 mm 2 (1.27mm 2 )  ▄ 2.9mm x.9mm mirror end 1.62mm 2 Grove Geometry  Straight Vertical  Straight Horizontal  Center Rib Reflector Material  Tyvek  Sputtered Al or Au

7. 4/1/2002Manuel I. Martin Testing Generate Written Procedures for:  Finishing surfaces of cells  Apply reflective material  Cut grove  Insert and glue fibers  Build cells, towers and super-towers  Measure comparative light output  Measure absolute light output  Interpret data and convert to ‘standard’ format

8. 4/1/2002Manuel I. Martin TEST MATRIX Scintillator BC-408 SputteredTyvek Ø▄Ø▄ Straight Vertical X (SCV) X (SSV) X (TCV) X (TSV) Straight Horizontal XX (SSH) X (TCH) X Center RibXXX (TCR) X