Special Meeting Grounding Scheme Summary 9/22/21

PARTICIPANTS: Carlos, Fernando, Thi, Emmanuel, Vladimir, Tanja, Brad

DISCUSSION GROUND BETWEEN PCB AND ALUMINUM PART

• Option to connect PCB+aluminum part

• Enclosure already grounded through mechanical attachment to structure - cannot isolate detector from support structure

• mu metal shield already connected to mechanical structure
• make sure that shielding ground (through mechanical structure) is separate from electronics ground

• Can put provision on PCB board for additional grounding - activating this feature would take some labor though (unplug, activate, reinstall, etc.)

• Review overview sketch of NPS grounding (Fernando)

• general agreement that it captures all features of NPS grounding
• next: put sketch into CAD for more detailed discussion

• Main NPS box isolated from carriage

• How to test grounding scheme

• can do some tests in the lab - some simulations possible
• ultimately will have to test when all is assembled

• Need information on position of connector on PCB

• Action items:

• generate CAD for NPS grounding
• finalize design of PCB - need position of connector
• test optimized divider (Vladimir)

• Estimated timeline:

• finalize PCB design
• prototype new PCB and testing
• production - should be in place by end of the year