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MoM 20240429
Management
The scintillator order has been placed. Now we need to focus on the SiPMs then the ASICs.
We need to pay attention the VAT exemption procedure, Philipp will contact ESA for that.
Documents (SoW/ICD)
SoW: a summary has been sent by Mrs Fang. The power consumption imposes POLAR-2 to be moved to another position on the CSS: 405c is limited to 300 W, while it was agreed since a long time that POLAR-2 needed 500W. The idea is now to move POLAR-2 to position 405a, which has a limit of 1000W. But we need to understand the FoV.
In the power budget we did not count the active adapter plate, which is consuming 50W, and is included into the instrument budget. But this 50W consumption is not continuous, only sporadic.
It takes 4 hours in principle to do the installation and the expected temperature drop is of 5C/hour. This is ok if there is no problem, but can be problematic if the installation process is suspended. One possibility to maintain the instrument in temperature is to have it powered throught the robotic arm adapter, 50W, but we should need an additional connector, which we did not include until now. Still for the moment we rather think of heating the instrument before the installation, and have it unconnected during the installation.
Still to have a correct idea of the situation we should determine what is the lowest operation temperature of the electronics. From the mechanics point of view, we can go as low as -40C.
The temperature ranges for the bars are: -60 C to 90 C
For the optical pads: -100 C to + 180 C
Still, we have to define a survival temperature range. For example, the SiPMs should be tested in the probe station from -40 C to 50 C.
One option could be to have heaters which can be operated though the robotic arm adapter. Anyway, let's put in the SoW -40C as hard limit and see how CSU reacts.
The next meeting with CSU should be on May 10th.
Module
The French company is still very interested in participating to the production.
Re the new design, Franck has made the design of the mould, it needs now to be produced. Protypes will be produced, to validate the approach. The idea is to avoid the remachining, by using 3 layers of fabric, to have a thickness below 0.75 mm.
The mould procurement will last 2-3 weeks, the procution tests should take place in early June.
For the mechanical modules, in addition to the dummy mass (plastic cylinders) we also need to procude the electronics simulators (91 pieces). We have to define the design and plan the production.
FEE
The tests on FEE04 are still ongoing. As 10 PCBs have been produced, it could be interesting to examine the remaining PCBs and see if they have shorts on the power lines.
Zynq: Dominik will try to work this week on it (but only Monday and Tuesday are woring days this week in Poland).
BEE/PHU
Yannick has submitted his RIDs, they are being examined.
Mechanics
We also need to build the mechanics of the P2PS.
Franck has received the quote for the main grid, around 20 kCHF. He will now ask the quotes for the other parts.
ComBox: we should have a meeting next week.
Action Items
AI-01: Dominik to provide support to Nicolas for Zynq readout FW. (in progress)
AI-02: Philipp to check the status of the requirements (if/what has been changed since the last version of BEE/LVPS) (in progress).
AI-04: Franck to examine the communication box into Polar2 (in progress)
AI-05: Franck to start thermal simulations of the full Polar2.
AI-07: Dominik to study how to connect the BEEs together, so that there is only 10 cables going from LVPS to BEE (after the review).
AI-08: Do a X-ray check of the FEE with capilarity transmission of the optical coupler.
AI-09: Philipp will write a non-conf report on the optical coupling problem.
AI-10: Philipp to check with Franck/Didier/Laurent if it is possible to prepare a SiPM jig for the cascade (in progress).
AI-12: Johannes will update the quotes for the part procurement of the module production (in progress).
AI-14: Franck to investigate the possibilities to have a large vacuum chamber.
AI-15: Dominik to put is Zynq code on the SVN (in progress).
AI-17: Design and prepare production of the mechanical modules. (Johannes, in progress)
AI-18: Philippe and Johannes fill technical documents (in progress)
AI-19: Nicolas will work on Zynq board (cf AI-01)
A-20: Philippe and Johannes update quotes with Franck for CN
AI-21: Philippe will integrate the EQM module prodution into the schedule.
AI-22: Philippe will do a dark count test to check FW.
AI-23: Philipp to update the schedule in the SoW.
AI-24: Philipp to contact ESA for VAT exemption for scintillator shipment.
AI-25: Philipp to clarify the SiPM testing conditions and ranges (they take time, even on the Cascade).
AI-26: Dominik to determine the operating temperature range for the BEE/PHU.
AI-27: Design and procude the mechanical FEEs (Philipp/Johannes/Yannick)
AI-28: examine the FEE pcbs not used for production and see if they present faults.
AI-29: procure a step file of the POLAR-2 environment (Philipp/Franck)
AI-30: Prepare the production of the mechanical modules (Philipp/Johannes).
AI-31: Design the mechanics of the P2PS (Nicolas/Franck)
AI-32: Organize a communication box meeting