1. HCAL-Fermilab7 Feb 2003Hazen / Machado HF Electronics PMT Readout Update E. Hazen, J. Rohlf, E. Machado Boston University

2. HCAL-Fermilab7 Feb 2003Hazen / Machado Outline ● PMT-to-QIE cabling summary ● Patch panel / ROBOX cabling design ● New QIE HF boards ● Test results (review) ● Plans for Test Beam

3. HCAL-Fermilab7 Feb 2003Hazen / Machado PMT-to-QIE Cabling PMT Anode 50Ω coax Skew-Clear ~50  single-ended to ground Coax shield ground at each PMT base Overall shield connected to QIE ground Separate Ground for each PMT QIE Signal Input QIE Reference Input PMT Box Two pairs per PMT channel Multi-pin shielded connectors (MDR-36)

4. HCAL-Fermilab7 Feb 2003Hazen / Machado PMT Box Signal Cabling MMCX on prototypes Soldered for production? SMB plug/socket for patch panel 50  mini-coax Patch panel PCBs Space for HV, Gas connectors

5. HCAL-Fermilab7 Feb 2003Hazen / Machado MDR Connector RefSignal Ref Return Signal Return Shield 12-pair Skew-Clear cable handles 6 QIE channels Each channel has: Pair 1: Signal, Signal Return, Shield Pair 2: Reference, Reference Return, Shield Overall Shield connected to metal connector backshell Can accommodate ether paired or coax cable for testing...

6. HCAL-Fermilab7 Feb 2003Hazen / Machado Skew-Clear Cables ● Two 5m cables delivered, but backshell with locking mechanism didn't fit... need to fix before testbeam cables are made. ● Can use existing cables for lab testing Cables made by assembly house have only shrink tubing

7. HCAL-Fermilab7 Feb 2003Hazen / Machado QIE boards for HF ● New prototypes available here ● Hope to take some home with new CCM for testing starting next week...

8. HCAL-Fermilab7 Feb 2003Hazen / Machado PMT+QIE Test Results (recap) ● Blue Nichia LED driven by Zetex avalanche transistor ● Pulser synchronized to QIE clock ● White paper (multiple sheets) used to attenuate to a fraction of a pe ● Data recorded using HTR+DCC thru VME

9. HCAL-Fermilab7 Feb 2003Hazen / Machado pulse 20 time samples (1500 V) 0-40 LC reflection (electric) reflection (electric)

10. HCAL-Fermilab7 Feb 2003Hazen / Machado 1, 2 pe response at 1500V 1500 V

11. HCAL-Fermilab7 Feb 2003Hazen / Machado 1pe peak vs HV 1100 V1200 V1100 V 1500 V1600 V 1700 V 1300 V1400 V

12. HCAL-Fermilab7 Feb 2003Hazen / Machado Signal / Pedestal vs HV sample 8 (pulse) sample 9 (reflec) HV signal

13. HCAL-Fermilab7 Feb 2003Hazen / Machado Average, Typical LED Pulses

14. HCAL-Fermilab7 Feb 2003Hazen / Machado HF Electronics for TB ● BU Responsibilities: – 12 skew-clear cables – Patch panels for PMT boxes (how many?) ● Plus participation in: – 3U crates w/ backplanes (2) – CCM + QIE board testing – LV power (?)

15. HCAL-Fermilab7 Feb 2003Hazen / Machado Task List