1. 1 HBD Update Itzhak Tserruya Upgrades meeting, BNL, October 11, 2005 Full-scale Prototype status Safety Review Detector box construction GEM production Stony Brook test and assembly facility Gas system Analog electronics Digital electronics Plans for run 6

2. 2 Full scale prototype status Gas tightness test at WI: leak rate 2.3 cc/min ~4 ppm of water (2 ppm from gas pipes) Triple GEM detector installed and tested inside the prototype in CF 4 with Fe 55 source. Shipped to BNL: leak during transport? leak rate now ~20 cc/min Plans: Install readout board on back of prototype Install preamps (old design) and do electrical tests to study signals with test pulse, noise, etc. Prepare and install a CsI photocathode into the detector Test GEMs with Fe-55 and UV-lamp

3. 3 HBD Safety Review Took place on September 15 No major issues. Additional documentation requested for: - HV PS - signal cables (appropriate flame and cable tray ratings) - aramid honeycomb is the same as nomex - SHV connectors Provide plan to limit the HV PS to 5KV

4. 4 HBD construction status All raw materials (FR4 sheets, honeycomb, HV resistors, HV connectors) ordered and most of them in house Detector box design fully completed Jig design underway Small parts (insert, pins, screws, HV holders..) in the shops Detector construction to start Nov. 1st PCB design almost complete Detailed construction schedule foresees shipment of boxes to SUNY in January 2006.

5. 5 Constraint on maximum number of pads: 1152 pads per arm or 192 pads per panel Would be much easier to have a round number like 1200 pads per arm or 200 pads per panel  not possible We found a solution in which each panel has 192 pads and yet all six panels are identical. PCB design

6. 6 GEM production GEM final order placed: - no changes wrt to pilot production - 65 standard GEMs - 35 Au plated GEMs - 100 frames First batch (app. 1/3 of the total) - 20 standard + 10 Au plated + 30 frames completed at CERN and shipped to WI. Gluing to frame, mounting HV resistors, and test of triple GEM modules with Fe-55 ready to start at WI First shipment of tested triple GEM modules to SUNY in 2 nd half of November. Last shipment in mid-February 2006

7. 7 SB assembly and test facility status Clean tent ready new filters/light in services (3-phase power, water, valve pressure) ready Glove box specifications defined bid process started a few weeks ago Glove box and evaporator from Jeff Lab are being moved to SB.

8. 8 GLOVE BOX Specifications  Type: Dry Nitrogen Glove Box –  H2O <10pmm,  Particle Level <100/m3,  Dehumidification Column with HEPA filtration,  Monitoring Instruments H2O, O2, Pressure  Pressure Range +- 10milbar,  N2, leakage 0.05%vol/h,  N2 Flow +250 l/Hr N2 From Boil off From Liquid N2, with Backup Cylinders Automatically engaged  Overpressure Vent, 4 Swagelock Fittings on each end to control gas Flow According to work.  Size (Interior): length 3m min., width 1.2m max., height 1.3m min.  3 working sections Storage [Middle] Gem Working area [Next to airlock] HBD Assembly [Hatch]  Air lock [or Transfer Chamber]  46 cm to 60cm Dia., GEM Shipping Box, and CsI Deposition Transfer Case can Pass Thru.  Maybe Pumpable, if not then a Pump Through System maybe used]  Fitted with N2 Feed, Exhaust, KF-40mm Vacuum, and H2O Measurement  Feedthroughs Panels: Located at Box ends and at center position  120VAC- 2 quad outlet Boxes with Power Strips,  Signal & HV, Gases on replaceable Panels  Gases on replaceable Panels  Lighting: Exterior and Interior Spot lighting  Glove Ports – Sealable,  8 Pairs of Glove ports, 6 pairs set evenly along the length of the Box, the 7th and 8th set above the 2 pairs next to the hatch, which is were we will assemble the HBD

9. 9 TH @ Jefferson Lab

10. 10 Total detector volume: ~ 626 l (313 l each side) Flow rate: ~ 60 l/hr ( ~ 150 l/hr purge) HBD Gas System Pure CF 4 Simplified Single pass system for Run 6 Extensive gas monitoring to maintain O 2 and H 2 O levels to a few ppm R.Pisani Gas pipes installed Most components ordered or in house

11. 11 Gas Monitoring McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D 2 lamp H 2 0 O 2 VUV transmission Gas monitoring near detector (under stairs by labyrinth) D.Lynch

12. 12 New Preamp Design ~ ½ the area of the previous version of the preamp (0.76” x 0.57 “) Uses small Samtec connector Uses new op amp with lower bandwidth which is less prone to oscillation  Considerable reduction in radiation length from 1.6% to 0.6%

13. 13 Schedule for New Preamps Basic design done by Joe Harder (while home recuperating from surgery !) Small prototype order (~ 200 pieces) placed (should take ~ 3 weeks) Test prototypes for oscillation, noise, etc (~ 1 week) Final design could be sent out within 1month New readout board design in parallel small changes to accommodate the new connectors should be ready in 3-4 weeks from now

14. 14 Updated HBD FEM Diagram Clock Master Clock fanoutADC Optical out Backplane Crate GTM/Ethernet New Daughter card + DCM Test pulse (7 blank boards, 4 crates+ 1 spare+ 2 test stands) (4 blank boards, 1 needed + 1 spare+ 2 test stands) (25 blank boards. We have major of the parts for 5 boards)  For Clockmaster, clock fanout, ADC and backplane, we either have (or will have in 1-2 days) the blank boards. These boards will be assembled soon.  Optical out – Design is done (not submitted)  New DCM daughter card design is underway. C.Y. Chi

15. 15 HBD plans for Run 6 We plan to test the HBD in run-6. The best would be to test it first with p+p collisions and then with Au+Au. But if run-6 starts with Au beams then we will reverse the order. In that case the plan is to install the HBD toward the end of the Au+Au period, in April 2006 From our present assessment, we should have ** at least ** one of the two HBD boxes partially instrumented. The precise configuration will depend on the availability of readout electronics: - minimum configuration: one box with one detector module - maximum configuration: one box fully instrumented