1. 1 HBD Construction status Itzhak Tserruya DC meeting, BNL, February, 2006 Plans for Run-6 Box construction GEM assembly and testing Status of urgent items order CsI and testing facility Gas system and gas monitoring system Preamps and Readout boards Readout electronics

2. 2 Plans for Run 6 We plan to test the HBD in run-6. We lost time due to the initial cancellation of Run-6. Order of critical items (like the PCB) got delayed and **we are trying hard** to recuperate that time so as to be able to install one box of the final detector by the end of May. To be realistic we need a fall-back solution. For that, and to pave the way for the installation of the final box detector, we are preparing the full-scale prototype for installation in April. By construction, the prototype will have only one detector module instrumented. The final HBD box could have all 12 detector modules installed but only a few will be instrumented (probably two), depending on the availability of readout electronics.

3. 3 HBD box construction All raw materials (FR4 sheets, honeycomb, HV resistors, HV connectors) all parts ( frames, window support, inserts, pins, screws, HV holders) in house. Jigs for panel construction ready Panel construction underway Jigs for box assembly under design or construction Bottleneck: PCB delivery 6 active panels 2 HV panels 2 side covers with frame 2 vertical panels 2 box frames window support

4. 4 A few pictures: frames (I) McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D 2 lamp Box frames Window support frames Side cover frames

5. 5 A few pictures: inserts (II) Gluing GEM support inserts on inner side of an active panel insert for gas in/out swageloc port All small parts ready lGEM support pin inserts for GEM support pin

6. 6 A few pictures (III) McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D 2 lamp Testing HV wiring - worst case 14 wires in – 21 wires out Gluing under vacuum of honeycomb to FR4 sheet Honeycomb glued to FR4 sheet

7. 7 GEM assembly and testing 3 GEM shipments so far: - 1 st batch (Oct. 05): 20 st + 10 Au plated + 30 frames - 2 nd batch (Jan. 06): 15 + 14 - 3 rd batch (Feb. 06): 5 10 + 31 - Total 40 20 75 Assembly steps and tests: - Stretch GEM foil and glue onto frame - Cut foil from stretching device - Solder SMD resistors to each HV segment - QA: apply 500 V across the GEM on air before and after each of these steps - Operate GEM at 500 V with 55 Fe on Ar/CO 2 and map the gain on 56 hexagonal pads - all data stored in a database Status - 1 st batch: all of them assembled 16 st + 10 Au plated passed all tests - 2 nd batch: 9 assembled. All 9 failed the tests. 4 of them passed the tests only after water cleaning. Reason not clear. The other 5 will also follow water cleaning. - We have a total of: 30 GEM fully tested (10 Au plated and 20 standard) i.e. 10 detector modules

8. 8 Status of urgent item orders PCB - raw material produced in GB is supposed to be delivered within days to CERN. - once the raw material arrives at CERN, GEM production will be interrupted. - manufacturing of PCB estimated to maximum 4 weeks, will strive for 3 weeks. - delivery expected first half of March. - once we receive the PCB, we will need app. 1 month to complete the construction of the detector box. Glove box - enlarged glove box ordered. Expected delivery 45-90 days, (Tom H says closer to 45d)  end March Signal cables - ordered. Delivery 6-8 weeks  mid March Gas monitoring system - 3 cell gas system ordered. Expected delivery 90-120 days  April-May - Marginal for run-6. Will rely on water and oxygen monitors

9. 9 CsI evaporation facility at SB Bill Andrzej - excellent photocathodes have been produced at SB using the Italian evaporator from Jlab. - one shot per week to master the whole procedure: handling of the GEMs, evaporation and measurements of absolute QE. - The “completeness” of the process grows each week. “Damn good vacuum in evaporator” (TomH)

10. 10 GEM testing facility at SB Stainless steel test box and 6 GEM (2 Au plated + 4 standard) shipped from WI to SB. Top GEM was “rubbed” by cross-pieces of grid during shipping. No other GEM showed damage.  Need to improve shipment conditions exercising handling, assembly and testing of triple GEM detector modules to start soon

11. 11 Gas transparency monitor system McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D 2 lamp 3-cell monitor system ordered by McPherson Hutch and services ready – Don L. 11/22/05

12. 12 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

13. 13 Preamps, readout boards and readout electronics Boards for the new pre-amp design were delivered a few days ago. Problem with slicing the board? We should have enough pre-amps for at least two readout boards (Joe Harder). New readout boards design finished. Material with optimized thickness, for minimum radiation length, ordered. Production will be made in BNL instrumentation (Bo). Readout electronics full chain test expected very soon. Only the prototype electronics will be available in run-6 (Chi).

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)  All boards in house and tested with the exception of the new DCM and optical module  Prototype DCM and optical module expected end of February.  Full chain test will then take place.  Two FEM already exist. Have parts for additional 5 FEM  total 336 channels (2 detector modules = 192 channels) C.Y. Chi