POLAR-2 biweekly meeting

Monday 20 Apr 2020, 10:30 → 12:15 Europe/Zurich

Agenda:

- Going over action item list

- Summary of first joined meeting with CSU

- Discussion on how to shift focus given the current situation

Minutes bi-weekly polar-2 meeting:

Attendance:
Geneva: Xin, Nicolas, Nicolas dA, Johan, Jerome, Merlin
Poland: Dominik, Agnieszka, Adam,
IHEP: Jianchao
MPE: Jochen, J. Michael

Update WP1 (polarimeter modules):
- NDA: scintillator delivery will be delayed until mid-June
- NDA: working on optical simulations to study the effect of not wrapping the scintillators all the way but instead adding a coating at the parts covered by the plastic grid (which is transparent)

Update WP2 (FEE):
- Jerome updated the trigger scheme figure and FEE overview figure based on FEE meeting last week and will put these in the TDR
- Merlin and Jerome will produce a fist HW component list to be send to ESA for export check, no replacement for the HVPS chip has been found in Europe, Jochen will check with group which is developing a cubesat with SiPM readout, Merlin will check with Yongjie
- Yannick is quite convinced GoWIN will not work with radiation, we will do the tests anyway but will start focussing also on the NanoXplore
- Weeroc has answered with more questions for the Citiroc investigation, they have not heard from any other user about the mentioned issue which might indicate the problem is on our board and not in the ASIC

Update WP3 (BEE):
- Dominik designed the boards for SiPM readout to perform tests in Poland with these. No manufacturer has been asked yet, this will likly take a few weeks to produce.
- Dominik will come with a preliminary component list to be send along with the FEE one to ESA for checking (Merlin will send this by Friday)

Upadte WP4 (LVPS):
- TDR has been updated already a while ago by Dominik! People should check!

Update WP5 (Mechanics):
- Franck has produced the 3d models and send them to CSU, Merlin will plan a follow-up meeting with them to reach a final decision on the designed

Update WP8/3 (POSS/BEE):
- No reply yet from company which can provide the fibre communication board, Dominik will retry to start communication with them we are a bit blocked on this.

Update WP9 (scintillators):
- Jochen ordered the first scintillators, should arrive in mid-May, needs help from Geneva to start testing (can be done with Babymind)
- Merlin has started to work with Anna (bachelor student at MPE) on optical simulations for the scintillators, this is progressing
- "Wok" will not be put in the design for now until we receive more information on size/requirements
- Jianchao will start with optical simulations for the scintillator based on the official polar-2 simulations which are now on githib, will perform this in close collaboration with Johan (now in charge of the simulations)

Other:
- No news from CERN regarding recognition of the experiment. Merlin has 2 articles ready for press release once this happens but will wait for the official news.
- Meeting in May in Germany is cancelled, not possible to have it at the same place later, we will have to replan this meeting (maybe in China?_. Will start this once things are more clear.