Learning Objective: This module is intended to teach operators how to use the Cavity Summary Display to monitor and diagnose issues with cavities.
Skills:
- Know how to launch the GUI
- Understand the information presented on the GUI
- Know how to interpret faults and see the status of all potential faults associated with a cavity
- Understand how to restart backend if the display stops updating
Introduction:
The Cavity Summary Display is similar to the Klystron displays used in LCLS and FACET, but instead of displaying klystron information, the Cavity Summary Display shows cavity faults for all cavities in cryomodules 01 - 35. The GUI also displays whether a cavity's SSA is on and whether or not is has RF.
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How to Launch the GUI:
To launch the Cavity Summary Display locally at an OPI, follow the instructions below:
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Although cavities may have multiple faults at one time, the display can only show one fault at a time and it is designed to show the highest priority fault (aka the most severe/concerning fault) first. To see what other faults may be affecting a specific cavity, we can open a cavity fault panel for the cavity by clicking directly on the cavity widget. The resulting fault panel will display all the possible faults in order of decreasing priority. To see the PV associated with each fault, we can middle click the fault status box (which will display "OK", "FAULTED", or "INVALID").
Figure 3: Cavity fault display panel showing all faults for a given cavity
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