In analog case you don't read individual pixels. Vivek ask how many pixels? Depends on size of SiPM. The energy now is basically the number of pixels that fire. Leo asks what is the advantage here? Do you have more info? It can help to get rid of noisy pixels and reduce the dark noise rate. Most of the dark current comes from a few pixels (about a factor of 10). But SiPM manufacturing has improved, so less than a factor of 10 now, but still an attractive solution that provides a lot of info and allows for more filtering of info.
Vivek points out that Global Foundries has a facility in Albany. So he is wondering why they are working with the group in Singapore. Has to do with who is working where. A former Lausanne student is working for GF now.
Is this still interesting for ND-GAr? Can potentially help with the noise rate, which is probably even more important for GAr than LAr. Dark noise rate suppression is not enough for liquid xenon.
There will be a test stand at PAB, perhaps liquid and gaseous argon. Luke has a setup that can use liquid or gas. Potentially can start at atmospheric pressure.
Justo says foundry was doing everything from same wafer. So there is gain of having electronics plus NCER on the same chip. Also makes thing cheaper and saves on not having to gang things later, and later power consumption. So gain beyond just dark current rate. Also the Canadian version of the chip digitizes very fast, so this can help with dark current because you can have a smaller coincidence window.
Update from Naseem on TOAD reco: Has been able to put simulated track in and passed through GArsoft and put into reco event display. Still just 2D at the moment. Can now convert HDF5 file to root.
Ioannis: Waiting for new PCBs to be produced. They expect them in mid to late November. They have a procedure to test PCBs in vacuum and pressure before going into assembly. If there any beam, around April.
Miranda: On GORG have seen saturation effects in GEMs, perhaps due to sparking. Will probably open and visually inspect. They need a cleanroom for this. Trying to calibrate gain with iron 55 tests. Will try to use source outside box instead of inside to see if this was contributing to saturation effects.
Next meeting likely in 2 week, Nov 14th with talks from Justo and Pilar. Rik can maybe give an update at the meeting after that.