Difference between revisions of "Minutes-7-21-2011"

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July 14, 2011 FDC meeting
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July 21, 2011 FDC meeting
  
 
= Agenda =
 
= Agenda =
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# Other
 
# Other
  
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= Minutes =
 
= Minutes =
  
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Participants: Bill, Dave, Chris, Elton, Beni, Simon, Glenn, Caleb, and Lubomir.
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Participants: Eugene, Bill, Dave, Chris, Beni, Simon, and Lubomir.
  
 
== Production ==
 
== Production ==
  
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- Dave (see  the construction tracking): Cell#3 is almost ready, just second phase elements has to be put on the wire frame. The cathodes on cell#4 are ready except the flaps on the type-2 cathode. Now the techs are working on the cathodes for cell#5 using the two tensioning tools. We decided to postpone the wire frame production till we make a decision how to solve the HV problem, discussed later.  
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- Dave (see  the construction tracking): Continued with stringing wire frame#4. Wire frame#3 is waiting for soldering second phase component (Chris will do it together with Tina). Cell#5: one cathode ready, working on the second (type 2) cathode. Cell#6: working on the first cathode.  
  
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- Wire deadening: waiting for the chemicals needed. We will use the square lexan plate for tooling, but Bill will order another plate to be used for this procedure. Bill talking to Brian learned that the chemicals have to be neutralized at the end of the procedure and that was not always done before when experimenting on a testing wire frame. We will try the deadening first on several testing frames before using a production one. Dave with Al's help is finishing the micro-controller and also working on a way to bypass the 1M resistors on each wire channel.
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- Waiting for the chemicals for the wire deadening; probably will start testing the procedure beginning of next week. Bill: what is the wire diameter needed to deaden the wire? Lubomir: according to Garfield if we make sense wires 40um signal drops by factor of 40, for 60um - factor of 400, and for 80um -factor of 2,700. After some discussions, Bill will look what is the sagging effect of thickening the wires and Lubomir will estimate the suppression factor that we need.
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== Engineering ==
 
== Engineering ==

Revision as of 14:42, 22 July 2011

July 21, 2011 FDC meeting

Agenda

  1. Production Construction Tracking (Dave)
    • Status
    • HV tests: results, testing procedures (Lubomir)
    • Other: wire deadening, iron source
  2. Engineering update (Bill)
  3. Electronics update (Chris)
  4. Chamber testing at EEL126
    • Tests with external tracking (Beni)
  5. Other


Minutes

Participants: Eugene, Bill, Dave, Chris, Beni, Simon, and Lubomir.

Production

- Dave (see the construction tracking): Continued with stringing wire frame#4. Wire frame#3 is waiting for soldering second phase component (Chris will do it together with Tina). Cell#5: one cathode ready, working on the second (type 2) cathode. Cell#6: working on the first cathode.

- Waiting for the chemicals for the wire deadening; probably will start testing the procedure beginning of next week. Bill: what is the wire diameter needed to deaden the wire? Lubomir: according to Garfield if we make sense wires 40um signal drops by factor of 40, for 60um - factor of 400, and for 80um -factor of 2,700. After some discussions, Bill will look what is the sagging effect of thickening the wires and Lubomir will estimate the suppression factor that we need.

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