Difference between revisions of "Minutes-9-10-2015"

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= Minutes =
 
= Minutes =
  
Participants: Curtis, Naomi (CMU), Fernando, Eugene, Luke, Beni, Dave, Marc (Mcmullen), Chris, Nick, Simon, Sergey and Lubomir (JLab).
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Participants: Curtis, Naomi (CMU), Sean (NU), Fernando, Eugene, Luke, Beni, Dave, Marc (Mcmullen), Nick, Simon, Sergey and Lubomir (JLab).
  
== CDC update ==
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== Other ==
  
- Simon went trough half of the CDC layers: the deformations are not always in vertical direction, i.e. this may not be sagging. Need to make a map of all the measurements to make some conclusion.  
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- Curtis and Naomi discussed the tracking session for the coming collaboration meeting. So far two reports were requested, FDC (Lubomir) and tracking (Simon) update; expect one more about the CDC, to be discussed later.
  
- Beni: CDC is working now with the new MFC (separated from the FDC) blending the same 50/50 mixture. Need to verify this with the CO2 sensor.
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== CDC update ==
  
- Measurements over weekend in mode 7.
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- Simon showed a map of the CDC (attached above) with the maximum drift distances, as seen by tracks coming from the target. Shown is the distance at the middle of the straw assuming sagging. One can see that certainly not all offsets can be related to gravity, so most likely there are tube deformations. Discussions how to parametrize the deformation and the time-to-distance function: most likely it is enough to use one function/table with extended distances (Curtis). Suggestions: to look along z, also to plot the asymmetry in positive/negative phi.  
  
 
== FDC update ==
 
== FDC update ==
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== Electronics ==
 
== Electronics ==
  
- The reason for the LV module failure not known yet.
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- Nick; The LV module that failed is working fine under load. The pre-amp production is going well.
  
 
== Engineering ==
 
== Engineering ==

Revision as of 17:08, 11 September 2015

September 10, 2015 Drift Chamber meeting

Connection

  1. Instructions for Bluejeans meeting connection
  2. Meeting ID: 290664653
  3. To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.

Agenda

  1. CDC update
  2. FDC update
    • studies with 90Sr and 55Fe on spare package: [2],[3], [4]
  3. Electronics
  4. Engineering
  5. Other