Revise beam current showing 0 troubleshooting instructions #115
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| - Visit the beamline - (possibly with electronics if suspecting a hardware problem). | ||
| Software usually doesn't just stop normally when other things are working - right? :smile: |
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Meh this whole step isn't really that good - most of the time it's "tell DSG to visit the beamline". I'm not sure there's really much that we'd do on the beamline without DSG involvement in this case.
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You probably mean TOF signal when you say PPP above? The PPP is the proton charge, the TOF signal is the frame sync. If you get frames but no beam current in DAE but accelerator has beam current, then that is a PPP issue. One issue we have had a few times at start of cycle has been scaling issues on PPP signal leading to ibex dashboard showing higher than ISIS accelerator delivering
| - [ ] data/transfer lights on a DAEII, flickering & transfer lights inactive not a good sign. Could be the link to the PC if transfer lights are not showing activity. | ||
| - [ ] If frame/raw counts are not showing up, a good diagnostic is to put the DAE into "Internal Test Clock". If this works and frames appear, it is likely that there may be a problem with a Time of Flight signal (this often affects more than one beamline. | ||
| - Most importantly, ask the scientists if anything happened around the time of the problem, in a recent case they mentioned someone had moved a cable on an ADC (although this was not the problem!). | ||
| - Look at the lights on the ADC or detector input module cards on the DAE. If no lights flickering, there is no data coming in and this is a good indicator that the HT might be off (a few lights might mean shutter closed or beam off). |
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Look at the lights on the ADC or detector input module cards on the DAE. If no lights flickering, there is no data coming in and this is a good indicator that the HT might be off
It feels like "get DSG involved" is a few steps before this...
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Re-ran CI once cloudflare stopped wobbling. |
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@Chsudeepta could you confirm why this was merged with outstanding review comments from both me and Freddie? |
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Tracking this here |
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