22.2.2023

There were several problems with the muon detector. Once we had finally found a way of replacing the C-60035 SiPM as it wasn’t possible to receive it before next autumn due to the current lack of semiconductors and we had solved all the encountered new issues with the muon PCB, it turned out that the connection between the muon detector and the main Arduino Nano didn’t function the way we thought it would. Therefore, we tried everything from an I2C connection to a digital pin connection, resulting in a solution using the analog pin A0. 

Furthermore, the PCB we had received from the scientists in Japan was wrongly manufactured. The connections were in the wrong spot, so that the two cathodes of the SiPM were connected to the detector instead of one anode and one cathode. We tried to connect the anode and cathode with the help of two thin metal wires instead but unfortunately the pins on the SiPM are so small that these broke because of too high temperature and over-machinating. We’re currently trying to find a solution with our extra SIPM. Otherwise, we’ve troubleshooted all possible problems by checking the voltage and current from all the test points.