Difference between revisions of "Minutes-9-17-2015"
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Participants: Curtis, Naomi, Mike (CMU), Luke, Beni, Dave, Chris, Nick, Simon, Sergey and Lubomir (JLab). | Participants: Curtis, Naomi, Mike (CMU), Luke, Beni, Dave, Chris, Nick, Simon, Sergey and Lubomir (JLab). | ||
| − | == | + | == Collaboration meeting == |
| − | - | + | - Sergey was included in the tracking/drift chamber session with a talk about the Transition Radiation Detector. |
== CDC update == | == CDC update == | ||
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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 and sum in positive/negative phi. | - 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 and sum in positive/negative phi. | ||
| − | - Scope pictures of signals from 55Fe source on one CDC straw shown the logbook link. When using adapter card without termination we saw ~20% reflection at 200 ns from the cable (18m). The reflections disappear when we used a terminated adapter card. However, it means that there's reflection not only at the adapter side of the cable but also at the HVB side - Fernando will look into that. | + | - Scope pictures of signals from 55Fe source on one CDC straw shown in the logbook link. When using adapter card without termination we saw ~20% reflection at 200 ns from the cable (18m). The reflections disappear when we used a terminated adapter card. However, it means that there's reflection not only at the adapter side of the cable but also at the HVB side - Fernando will look into that. |
== FDC update == | == FDC update == | ||
Revision as of 17:26, 23 September 2015
September 17, 2015 Drift Chamber meeting
Connection
- Instructions for Bluejeans meeting connection
- Meeting ID: 290664653
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Agenda
