POLAR-2 weekly meeting

Monday 23 Nov 2020, 10:30 → 12:15 Europe/Zurich

Zoom info:

 

https://unige.zoom.us/my/merlinkole

 

Agenda:

- Update Geneva

- Update Poland

- Update MPE

- Update IHEP

Minutes-weekly POLAR-2 meeting

Attendance:
- Geneva: Xin, Nicolas, Johannes, NDA, Jerome, Merlin
- Poland: Adam, Agnieszka, Slawek, Dominik
- IHEP: Jianchao
- MPE: Jochen, J. Michael

WP0:
- Merlin: No news from CSU or ESA, will ask CSU for an estimated time we can get answers, will remind ESA once again
- Agnieszka: Discussed on the Polish side, they have contacted ESA. No update this year, but it will be discussed in February at ESA and it is possible that funding can be spend already starting from January. Issues with understanding overhead since it is the first PRODEX funding to go NCBJ.
- Agnieszka: no time to look into joint proposal, will work on it this week
- Jianchao: expects some news on hardware funding early next year but will check with Shuang-Nan to see if things can be speed up.

WP1:
- Merlin: Tests with modules are ongoing, some issues with module 3 where the wrapping was too long, has to be redone. Have started discussions with Franck on automizing the cutting procedure of the Claryl.
- Merlin: Scatter piece was build and isntalled at CERN. First measuremens seem to show that everything is ok, however, proper calibration has to be done to be able to see these events in the data. Main work for coming days is updating the software and starting calibration/analysis properly.
- Johan: Worked on thermal setup. There will be an update on the design. Thermal imaging work showed that heat is transfered through the aluminium bars which has to be fixed.
- Johan: Has received PDG to attach and improve the thermal paths from the electronics, will restart tests soon.
- Merlin: will check with CERN again for the optical test bench to check optical properties of the plastic printed pieces

WP2:
- NDA: Has finished characterization of the 14 S13 SiPMs at Genva, will put the summarized data on svn soon.
- NDA: Leakage current is uniform for all different arrays, things look compatible with data sheets Hamamatsu.
- Jerome: Brought the arrays + components to Hybrid for integration. Small misunderstading on whether they should assemble everything or just SiPMs. Asked for a new quote to see if it is reasonable, if so they can mount everything.
- Jerome: working on ADC board, should be finished soon.
- Slawek: Ready to do the radiation tests for the S13 arrays, however, will focus on the S14 single channel results first.

WP8:
- Nicolas: Things are getting more clear on the design. We will have 4 incoming fibres so we need to use 2 FAE boards and 4 optical modules. Will be around 110'000 euro.
- Nicolas/Dominik: Commanding of the boards will have to be done through the normal 1553 line, no real other option. Jianchao will check with CSU about this.
- Dominik will base 1553 part on IBOX design. Will likely need a separate FPGA for this part
- Jianchao understood from HiSense that we might need an attenuator for the optical modules to make sure they don't overheat themselves. Is double checking with Hisense and CSU.
- Jianchao will also check with CSU if they have a test setup (EGSE like) ready which we could maybe test or if we can at least get the design, probably it is made by the company CSU recommended. However, the components should be the correct ones from TASSON and Hisense.

WP9:
- Johan finished the pyramid design in G4, there were some bugs but these are now fixed. Merlin will try again during this week and make a simple response for MPE to play with.
- Jochen reports that Anna will finish her thesis soon. She has updated some of her simulations to include off-axis incoming beams as well as the study of different types of wrapping. He will distribute something during the coming weeks.
- Jinchao and Johan discus about simulations of GeCAM type: Jianchao has the stp files for Johan to implement, however, Johan needs to have an idea for the locations. Jianchao will come up with some suggestions and suggests to only put the crystal as the other parts (electronics) can be changed more easily.

Other items:
- Nicolas suggest to add EQUATOR discussion to the weekly meeting. Merlin suggests that we do this if there is something to discus based on weekly discussions with Hancheng.
- Johan will present at SPIE next week, is preparing talk now. Conference is open to everyone (free registration)
- Nicolas will have a poster on POLAR-2 at the Swiss CTA day tomorrow.