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spenceraxani / CosmicWatch-Desktop-Muon-Detector

OUTDATED! Please do not use this repository for building new detectors. This repository if for the supplementary material used to build the Version 1 of the CosmicWatch Desktop Muon Detectors
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Displaying a very low rate #16

Open Alexandra0298 opened 5 years ago

Alexandra0298 commented 5 years ago

Hi, I have built a cosmic watch and it is displaying a very low rate. I have 29.3 v between the HV and the ground pin and between the no. 1 pin of the SiPM and the ground but it is still not working. I have also checked the 4.6 V line and it seems fine. Do you have any idea what could be the problem?

spenceraxani commented 5 years ago

Hi,

The best way to troubleshoot is to plug the detector into an oscilloscope. This will help you narrow done the part of the circuit with the problem. The first step would be to see if you can identify ~10-100mV and ~1us pulses coming out of the BNC connector out the back. If you do not, then the issue lies somewhere on your SiPM board.

If you do not have immediate access to an oscilloscope, the most common issue that I see is a missing or poor solder connection. In particular, have a look at your solder connections on the LT1807.

You can also send me a picture of your PCB and I can try to identify the issue.

Hope this helps,

Thanks,

Spencer

On Jul 24, 2019, at 7:11 AM, Alexandra0298 notifications@github.com wrote:

Hi, I have built a cosmic watch and it is displaying a very low rate. I have 29.3 v between the HV and the ground pin and between the no. 1 pin of the SiPM and the ground but it is still not working. I have also checked the 4.6 V line and it seems fine. Do you have any idea what could be the problem?

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