TDIS Bi-monthly meeting, 2019 November 19

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Agenda

Noise reduction in streaming readout prototype from Faraday cage

Target cell rolled with using 12um kapton film doubled over to produce a 24 um wall thickness

Minutes

Attendees: Paul, Carlos, Ed, Thia, Eric F. (on-site), Rachel, Arun, Dipangkar (online)

• Discussion about Ed's update: the Faraday cage, as implemented, is very effective at reducing the noise to a low value of about 3ADC (on 10ADC bits samples), consistent over all channels, and presumably close to the baseline noise. This drifted to a general discussion about the SBS GEMs noise: Old Pedestal noise measurements have shown a sigma of 20 ADC for the UVA GEM chambers. However: strips are 4 times longer for UVA GEMs than for the MSU GEM, which increases the capacitance of these. Plus, SBS GMEs use APV 25 which have 12 bits ADC samples, so this 20 ADC value would be the equivalent of 5ADC on a 10ADC sample. So presumably it is not that bad.

• Discussion about Dipangkar's update:

Organizational details

11:00 AM, JLab meeting room: TED 2561A

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