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Digital Hadronic Calorimeter

Digital Hadronic Calorimeter. Hardware Status. 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

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Digital Hadronic Calorimeter

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  1. Digital Hadronic Calorimeter Hardware Status Manuel I. Martin

  2. 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” Manuel I. Martin

  3. 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 Manuel I. Martin

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

  5. 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 Manuel I. Martin

  6. 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 mm2 (1.27mm2) • ▄ 2 .9mm x .9mm mirror end 1.62mm2 • Grove Geometry • Straight Vertical • Straight Horizontal • Center Rib • Reflector Material • Tyvek • Sputtered Al or Au Manuel I. Martin

  7. 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 Manuel I. Martin

  8. TEST MATRIX Manuel I. Martin

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