[Clas12_rich] RICH status update

[Tyler Lemon]

Hello,

This is an update on the status of RICH components. Please let us know 
if there are any corrections or anything to add.

There have been six total spherical mirrors delivered and stored in the 
EEL 121b cleanroom. Four (C2, C3, C4, C5) were measured using a CMM. 
Mirror side lengths and thicknesses have been analyzed using the CMM 
data by INFN and DSG. Two more spherical mirrors were delivered on July 
15, 2016.A final shipment of four mirrors is expected to be delivered by 
the end of July.After shipment, there is one month to determine if they 
meet the desired specs and accept the mirror.Mirrors C2, C3, C4, and C5 
have been accepted.The two mirrors currently at JLAB and the four 
expected will be measured by CMM using a procedure developed to allow 
better analysis of these mirrors.The spot tests using the light source, 
CDD camera, and mounting system will be performed for all mirrors. All 
mirrors will need to be shipped for their final reflective coating.

Twenty aerogel tiles were delivered to JLAB and visually inspected. Six 
more tiles were expected in June and eight partial tiles are expected in 
July.Tiles are stored in dry boxes in EEL 12lb cleanroom’s gowning 
area.Tiles have been taken to CUA in Washington, DC by INFN for testing.

Pre-production electronic boards are expected by the end of July and 
will be tested at JLAB. Production boards are expected to be shipped by 
end of summer 2016 after pre-production board acceptance.Assembly of 
electronics can begin once electronics arrive.Electronics will be 
assembled in EEL 124 or EEL 121b, depending on space availability.

Forward Carriage Level 3 has been approved for the location of air 
cooling system compressors, tank, and valve panel (see email on June 24, 
2016).Forward Carriage Level 2 is expected to be the location for the 
power supplies and electronic components for the detector.

The assembly structure and other structural components are expected to 
arrive at JLAB in September.Bolting the assembly structure to the floor 
for anchoring in both EEL 124 cleanroom and Hall B has been approved 
(see Bob’s email on July 15, 2016).It is being confirmed that space in 
EEL 124 will be free for assembly (see Walt’s email on July 14, 
2016).Assembly will start in October or as soon as space is available in 
EEL 124.

PRs have been submitted for all interlock system components and buyers 
have been assigned.PRs for air cooling and nitrogen purge systems have 
been submitted.A quote for the air cooling system pressure transducer is 
still needed and its PR will be submitted as soon as the quote is received.

Considering the above status, there are the following questions:

1.What are the names for the two mirrors received on July 15?

2.When should CMM measurements be arranged?

3.As discussed in DSG-INFN meetings last week, has a procedure for what 
CMM measurements to be taken been developed?

4.Will the spot tests with the light source and CCD camera for Mirrors 
C2, C3, C4, and C5 be repeated with the mirror mount?

5.When will light source and CCD camera return to JLAB for spot tests of 
mirrors received?

6.When will the mirrors be shipped for their final coating?

7.Did the aerogel shipment expected in June arrive at JLAB?

8.What were the results of the aerogel testing at CUA in Washington, DC?

9.When is the next shipment of aerogel expected?

10.Has Forward Carriage Level 2 been approved as the definite location 
for the electronics racks in the Hall?

11.Has the bolt size been determined for the assembly structure mounting?

12.Where will the pre-production electronics be tested?


Best regards,

Tyler

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