1Sasha Milov DC meeting Jan 11, 2006

HBD upgrade status.HBD upgrade status.

Sasha Milov

Jan 11, 2006

2Sasha Milov DC meeting Jan 11, 2006

Mechanical assembly Mechanical parts are being produced PCB design finalized, Itzhak is at CERN negotiating production time. A backup option considered.

Photocathode production and measurement SUNYSB to start weekly cycles of evaporating and measurements

Testing GEM testing box is in work, needs to be equipped with LEMOs BNL makes preparations to measure CF4 scintillation LEGS beam test is not happening soon (as planned)

Electronics and monitoring status ADC unit works yet without real input and looks good (see a backup slide) Takao shown framework to monitor HBD performance

Progress:Progress:

3Sasha Milov DC meeting Jan 11, 2006

Mechanical parts and PCB.Mechanical parts and PCB.PCB final design.Quick MC shows no difference with standard cells

Entrance window frames are ready, the window itself to be tight between them

4Sasha Milov DC meeting Jan 11, 2006

Gas monitoring system.Gas monitoring system.

Input and two outputs measured by moving mirror.

More expensive but clearly better

Input and two outputs measured by switching gas

5Sasha Milov DC meeting Jan 11, 2006

SUNYSB starts evaporation cycles.SUNYSB starts evaporation cycles. Status:

Evaporator – OK, as it was last time Laminar table – OK. Filters replaces, ready to go. Vacuum storage – almost OK, matter of days. Frames to hold GEMs are manufactured. Test box arrived needs connectors (~2 weeks) Glove Box new is still in the bidding stage, INFN may get some improvement for to be used for gearing up Gas system in assembly stage

Strategy is to start weekly cycles of going from start to end getting more and more operations in routine from cycle to cycle.

Use laminar table assembly Pump to water drop, as seen last time Evaporate and measure Q.E. in situ Get chicklets to Bob A. for Q.E. control

Next cycle (reusing the same GEM for evaporation): Improve in situ Q.E. control add GEM triplet gain measurement

6Sasha Milov DC meeting Jan 11, 2006

Back to prototype?Back to prototype? With “unexpected” return of Run6 we need to make sure the full scale prototype can go in and work to have something better.

1R, Bertan (4100V), I~330A 1R, LeCroy (2400V), I~194A

2R, Bertan (4100V), I~165A 2R, LeCroy (4100V), I~165A

Bob checked that the LeCroy power supply can be used. It requires divider resistance to be doubled. No extra noise detected.

7Sasha Milov DC meeting Jan 11, 2006

PCB (Itzhak)

Gas Monitoring System (Craig)

Glove Box (SUNYSB)

Signal Cables (BNL + Chi independently)

Infrastructure preparation in the IR (Don+)

Important standing Issues.Important standing Issues.

8Sasha Milov DC meeting Jan 11, 2006

Mechanical assembly is on its way. Pad plane design is finalized

SUNYSB is starting cycle to get up to a reliable routine operation.

First look at the ADC modules is encouraging. More to come when a preamp board prototype is attached to it

Glove Box is still waiting bids to come back. There are other items with long lead time and we are working on getting them out soon.

Prototype needs to be in a good shape no matter what. It can operate on LeCroy PS, which is available. However the gas tightness might limit gas purity one can achieve with it.

GEM testing box in in work. We might be able to measure GEM stacks in weeks from now. BNL will try to do a scintillation measurement.

Summary:Summary:

9Sasha Milov DC meeting Jan 11, 2006

BACKUPSBACKUPS

10Sasha Milov DC meeting Jan 11, 2006

Electronics signals.Electronics signals.