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Assembly and testing facility. Sequence of operations Glove Box Evaporator Other needs Testing. Sasha Milov March 9, 2005. Sequence of operations:. @WIS: Mechanical construction of the HBD volume Gas leak tests Framing GEMs Testing GEMs @SUNYSB:

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slide1

Assembly and testing facility.

Sequence of operations

Glove Box

Evaporator

Other needs

Testing

Sasha Milov

March 9, 2005

Sasha Milov EC/DC meeting March 9, 2005

slide2

Sequence of operations:

  • @WIS:
    • Mechanical construction of the HBD volume
    • Gas leak tests
    • Framing GEMs
    • Testing GEMs
  • @SUNYSB:
    • Preparation of the of the CsI photocathodes
    • CsI quantum efficiency tests
    • Triple GEM amplification tests
    • Detector assembly
    • Electronics assembly
    • Gas leak tests
  • @BNL:
    • Integration into PHENIX
    • Commissioning
    • Operation

Sasha Milov EC/DC meeting March 9, 2005

slide3

Assembly site.

  • DC assembly site:
  • Spacious
  • Not very clean, but can be done “reasonably” clean.
  • “Reasonably” is still not good enough for CsI
  • Need a Glove Box

Sasha Milov EC/DC meeting March 9, 2005

slide4

What do we want form a Glove Box.

  • Glove box parameters considered:
    • approximately 2.5m long 1.3m wide, 1.5m tall
    • Three areas inside for Assembly, Storage and Preparation.
    • Humidity control system inside the box
    • ~250 l/h flushing gas system
    • Full size door on one side
    • Antechamber on the other side, preferably sustaining vacuum
    • Electrical and gas communications in/out
    • Detector positioning system inside the box
    • Shelves, boxes etc
  • Quotes:
    • There are preliminary quotes form several companies (Mbraun, Innovative Technology, CoyLab etc…) ranging about $40k before negotiations.
    • A “do-it-yourself” quote is probably slightly cheaper that that

Sasha Milov EC/DC meeting March 9, 2005

slide5

Glove Box.

Glove Box used at WIS

(CoyLab) 

 “mbroun” Company, (and several others)

Sasha Milov EC/DC meeting March 9, 2005

slide6

Evaporator (SUNYSB).

  • PRO:
  • Available, Close to assembly site.
  • Working, and was capable of producing several small photocathodes.
  • Can produce full size HBD photocathode (one per cycle)
  • CONS:
  • Originally a “target” evaporator not “optical”, therefore is not really clean.
  • Major problem is unreliability and diffusion pump which may send oil back into the vessel.
  • Expected to be significantly upgraded for HBD project.

Sasha Milov EC/DC meeting March 9, 2005

slide7

Evaporator (JLab option).

  • PRO:
  • Rolls-Royce class evaporator.
  • Capable of producing several HBD photocathodes in one go.
  • No exposure to the air.
  • CsI QE control “in situ”
  • Cooperative crew.
  • CONS:
  • Not a domestic one.
  • Can be used but not on a regular basis

Sasha Milov EC/DC meeting March 9, 2005

slide8

Other needs.

  • Gas system:
    • Needs quite simple gas system (cylinderreducerexhaust) for N2/Ar and CF4. Something we can put together in the tent at SUNYSB.
  • Other:
    • Tools, soldering station, consumables etc.
  • Electronics test bench
  • Vessel for triple GEM module testing.

Sasha Milov EC/DC meeting March 9, 2005

slide9

Testing I.

  • Stainless steel prototype (WIS prototype):
    • Arrived to the US.
    • Requires CsI photocathode to be put on and assembly.
    • Will be ready for LEGs test scheduled at the end of March.
    • Major purpose to measure N0 (Nphotoelectrons).
  • FR4 prototype (BNL prototype):
    • Under gas flow right now, H2O and O2 readings in the morning: 19ppm and 12ppm after 5 days of N2 flushing.
    • Can be ready for LEGs test as well.
    • Major purpose is to study detector with realistic materials and electronics.

Sasha Milov EC/DC meeting March 9, 2005

slide10

Testing II.

  • Full scale prototype (WIS):
    • Mechanically almost complete
    • To be shipped here after gas test and HV tests
    • Final assembly exercise
    • Gas testing
    • Gain aging tests
    • CsI QE degradation tests
    • Electronics testing
    • Major purpose: study detector in final configuration.

Sasha Milov EC/DC meeting March 9, 2005