• Created by Unknown User (phansson), last modified on Feb 10, 2014

Webex meeting for those not at SLAC: https://confluence.slac.stanford.edu/display/hpsg/Webex+connection+details

Agenda
  • RCE platform news
  • FE board 
  • Hybrids
  • Signal flange board tests
  • LV power: cable design,  drops/power
  • Sub-projects (link)
  • Approval document/ DOE review response
  • AOB

Minutes

FEB and Hybrid

FE boards and hybrid boards will be here on Monday. Some delays going through purchasing. Ryan mentioned that a new procedure is in place to essentially plan for the purchase delays in the process in the future.

LV power

Pelle showed his idea of cable layout for the LV power. Only comment was to make sure that the mating type between the cables from the mezzanine adapter boards and the cables from the PS are such that they can mate. This will allow for testing without having to go through the flange board.

This example had the high current channel split on three twisted pair cables to share the load all the way from the PS. 

Pelle showed an example of how the layout of the LV power flange board could look. Ryan mentioned that we should try to have strain relief at the edge of the board where the pigtail cable will come off. We will put holes at the short end of the board to enable that. 

 Tim pointed out that we still need to think about the thermal properties of this bundle in the vacuum chamber. We can accommodate even more extra pairs for the high current channel inside the vacuum chamber. Right now we decided to keep four pairs assigned to that channel in order to go ahead with the schematic and layout plans. We can easily expand this to more if we feel the need. One constraint is that if we want to use the SUBD connectors qualified for vacuum/Bfield the wire gauge needs to be ~22AWG according to spec. Pelle will verify that we can use 20AWG as his example is based upon. Outside there are DSUB that can handle 20AWG. The other option would be to make sure we can extract the heat from the bundle inside the chamber in some well defined way. We need to follow up on this. 

 

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