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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

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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.

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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 coverswith frame

2 vertical panels

2 box frames

window support

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A few pictures: frames (I)

McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D2 lamp

Box frames

Window support frames

Side cover frames

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A few pictures: inserts (II)

Gluing GEM support inserts on inner side of an active panel

insert for gas in/outswageloc port

All small parts ready

l GEM support pin

inserts for GEMsupport pin

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A few pictures (III)

McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D2 lamp

Testing HV wiring - worst case14 wires in – 21 wires out

Gluing under vacuum of honeycomb to

FR4 sheet

Honeycomb glued

to FR4 sheet

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GEM assembly and testing • 3 GEM shipments so far: - 1st batch (Oct. 05): 20 st + 10 Au plated + 30 frames - 2nd batch (Jan. 06): 15 + 14 - 3rd 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 55Fe on Ar/CO2 and map the gain on 56 hexagonal pads- all data stored in a database

• Status - 1st batch: all of them assembled 16 st + 10 Au plated passed all tests - 2nd 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

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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

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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)

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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

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Gas transparency monitor system

McPherson 234/302 VUV spectrometer - uses pure argon as reference gas (no vacuum) - completely enclosed 30 W D2 lamp

3-cell monitor system ordered by McPherson

Hutch and services ready – Don L. 11/22/05

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Total detector volume: ~ 626 l (313 l each side)

Flow rate: ~ 60 l/hr ( ~ 150 l/hr purge)

HBD Gas System

Pure CF4

Simplified Single pass system for Run 6

Extensive gas monitoring to maintain

O2 and H2O levels to a few ppm

R.Pisani

• Gas pipes installed• Most components ordered

or in house

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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).

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Updated HBD FEM Diagram

Clock Master

Clock fanout ADCOptical

out

Backplane

Crate

GTM/Ethernet

New Daughter card + DCM

Test pulse

(7 blank boards, 4 crates+ 1 spare+ 2 test stands)

(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