IB2 Endcap
Muon Chamber Meeting
Below are the minutes for the Endcap
Muon Chamber Meeting. If
you find errors or wish
to correct them, please contact me at apollina@fnal.gov.
In attendance: Nelson Chester, David Eartly, Ron Evans, Yuri Pischalnickov,
Oleg Prokofiev, Glenn Smith, Laura Vanoli,
Outgassing Tests
Laura presented a summary of the tests she has run so far. She employed
an RGA (Residual Gas Analyzer) to determine the amount of outgassing from
Plascore sample. From the results, it seems that the moisture (water)
and CO, CO2 are the only major substance outgassing from samples of panel
pieces. She couldn't determine if the outgassing happens from the
core material or the copper surface. The outgassing was much higher
from a sample where the sample was cut in half through the the center of
the core material, suggesting that the core is the highest outgassing surface.
This is to be expected, considering the extremely large volume of surface
area exposed in this case. If the outgassing comes from the core, that
the limited amount of core in contact with the gas volume is such
that we should amply satisfy the requirement of H2O < 1000 ppm.
She will start measuring outgassing from the epoxy next.
MP-9 Setup
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Glue Station - Bud is needed to help Glenn re-setup this station.
It must be reassembled in order to have outside maintenance make repairs
to leaking components.
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Action Item: Glenn to arrange
time with Bud to setup this machine.
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Tension Tester - Setup and ready to use; will need to make
final adjustment once panel with combs is placed on table.
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Soldering Station - Setup and ready to use.
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Ionized air cleaner - D. Northacker is setting up compressed air/nitrogen
supply.
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Winding table, Assembly table, box of panels, and Unistrut cart all
moved successfully on Wednesday to MP-9.
Procurement Status
All parts for RTV sealing cart and Panel Glue Transfer Cart are on
order and expected in by 10/1/98. Cosmic Stand design has been
accepted by N. Chester. Parts are in the process of being quoted.
Glenn indicated that he needed a copy of the MSDS for the epoxy used to
bond G-10 parts to the panels. Oleg indicated that the Epoxy on hand
is close to exceeding its "use by" date and suggested ordering additional
fresh epoxy. Req. for the purchase of 14 panels is on hold pending
agreement with Plascore on what process changes
and improvements will be used to produce panels.
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Action Item: Ron to have quotes of
Cosmic Stand parts available to send to A. Korytov by Friday. We
would hope that Korytov would be able to make decision who should
purchase materials for UF site at Tuesday, 9/22 conference meeting.
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Action Item: N. Chester to provide Ron
with Epoxy material drawing so he may obtain MSDS from supplier for Glenn.
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Action Item: Glenn to notify Ron when Gluing
Station will be functional so that Ron may arrange to have repair company
to fix leaking parts.
Order for next 14 Panels
Dave Eartly received a letter from Plascore but it lacked the detail
needed to understand how Plascore would process the next group of 14 panels.
It was suggested by Nelson that rather than wait for Plascore to respond,
we present them with our purchase request detailing the steps we want Plascore
to take during the production of these panels.
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Action Item: Nelson to propose a
procedure for Plascore to follow. This proposal is to be reviewed
at a 9:00AM meeting on Thursday, Sept. 20, 1998 in the IB-2 Conference
Room with D. Eartly, O. Prokofiev, R. Evans and N. Chester.
The Proposal follows:
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Cores for two panels are to be cut on each of the proposed saws that Plascore
intends to use in production. Once cut these cores are to be measured
for thickness variation using a depth gauge and measuring through the honeycomb
structure. Enough data points are to be taken to give a good indication
of the thickness variation over the entire core. If largest variation from
maximum to minimum is < 0.010" Plascore is to proceed to epoxy skins
to cores. If cores exceed the above variation, Plascore will contact
Fermilab to discuss improvement possibilities. Plascore will not proceed
with prior approval from Fermilab.
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Approved cores are to be further processed into completed panel assemblies.
During the pressing and curing operations Plascore will insure that the
press platens are clean and free epoxy drips or other materials that might
cause dents or marks on the panel skin surfaces. Plascore will take
efforts to insure that the platen surfaces remain flat and parallel during
the the pressing operation. Once the panels are cured Plascore will
measure the flatness of the panels produced by setting each panel vertically
on a long edge and using a straight edge, string, or the like, measure
the bend and bow both horizontally and vertically at enough places to characterize
the bow in the panels. At its option, Fermilab may elect to visit
Plascore once panels are completed to make final measurements prior to
Plascore shipping the panels to Fermilab.
Thursday Special Meeting to discuss:
a. Panel measurements at Fermilab
b. Quality Assurance at Placore
c. Plascore processing requirements for 14 panels