Background Info tab
| Instructions | Action Fields |
|---|---|
| Select Lead Tester's Name | Pulldown menu of Names |
| Enter any other testers' names | A box people can type in and the text is saved as a string |
| Enter date | Maybe don't need this as an enter box, but display of date/time might be nice and needs to be written to CSV |
| Select Cryomodule | Pulldown with CM01-35 and HL1 & 2 |
| Select Cavity | Pulldown menu 1-8 |
| Check that you're allowed to turn on the cavity, the CM is at 2K, and that the radiation monitoring system is installed | Checkbox: Yup, we're good to go |
Magnet Test tab
If this cryomodule's magnets haven't been tested yet:
| Instructions | Action Fields |
|---|---|
| Open striptools to monitor magnet temperatures and readbacks | Buttons to open striptools (needs to pass CM/Cavity from background tab) or plots on screen |
| Push button to open display for quad magnet control | Super fancy button that takes CM info and passes it to open the e/pydm display or have scripts to do next few steps |
| Reset and turn on the power supply. Degauss the magnet by selecting "Degauss" under the Ready menu (horrible instructions, apologies). After the degauss has finished, set BDES to 8.5 and trim. | Scriptify please, need script to check for successful reset/on, degauss and trim and alert the user if any fail |
| For the XCOR and YCOR, reset and turn on the power supplies. Set BDES to 8.5 and trim. | script. Same caveats as above. So these will be push buttons to run the scripts? |
| Leave the magnets on for at least an hour, monitoring the temps occasionally while continuing the cavity commissioning. After the hour has passed, trim the magnets to 0, then turn off the power supplies. | Script to 0, trim, & off the magnets. |
| Take screen shots of the temp & readback plots and post to the elog | A button to do this? |
Prep for Cavity Test tab
The tasks described in this section should be done after the linac is cooled to 2 K. In general, not much time is foreseen for in-depth trouble shooting on individual cavities. If problems are encountered, the issue should be classified and recorded, then move on to the next cavity. These problems will be evaluated and solved by the respective experts offline.
| Instructions | Action Fields |
|---|---|
| Open the RF Cavity Overview EPICS display | Pushbutton that parses the CM/Cav info and passes to epics display OR maybe we don't need it? |
| Start a bazillion striptools: cavity temps, vacuum readbacks, CM temps, LLs/JTs/Pres/etc | Plots along the bottom - cuz we're going to want to watch them from multiple tabs? Or open in a separate window? Or the super fancy filmstrip idea |
| Verify that the radiation monitors are reading out | check box |
| Open the interlocks panel, click the reset button, and verify that all interlocks clear | Button to open interlock display in sub-window OR script to push reset and point out to the user if there's a problem |
SSA on & Calibrate tab
| Instructions | Action Fields |
|---|---|
| Select Characterization Panel | Pushbutton to open it in an embedded window OR script to do all of these steps... |
| Check that the SSA Drive Max is set to 0.8 & push the Go button | |
| If the task does not complete or completes with an error, lower the SSA Drive Max and re-run calibration. If it still does not complete, call... | |
| Once it's complete, PUSH the calculated SSA slope & SAVE |
Tune the Cavity to 1.3 GHz tab
| Instructions | Action Fields |
|---|---|
| Select Frequency Tune panel | Open embedded or start a script? |
| Select Chirp for RF mode. Set the drive level to 15% | script |
| Turn on the RF | script? |
| Open a striptool with the chirp detune and total steps | pushbutton or already have plot on the display |
| Record the cold landing frequency (the chirp detune) of the cavity in the elog | caget or a box showing the detune. Button to record value to a python variable for writing to CSV file. Button to stick in elog? |
| Open cavity overview waveforms display | button to open or already show the waveforms on display |
| Reset the total stepper motor steps | Show the total, provide the reset button |
| Set the stepper to 10000 steps (1E4). Click the right arrow. Verify that the detune amount moves toward zero. The calibration is approximately 10 Hz/step. If the detune increases, go 20000 steps with the left arrow and verify that the detune moves toward zero. If not, contact an expert. | |
| Move the stepper until the chirp detune is less than 5 Hz. Expect to move many millions of step.s Record the number of steps that is needed to get the cavity within 5 Hz detune. | Are we brave enough to have a script do this? |
| Set the piezo to enabled and dc mode | buttons or little script |
| Verify the piezo engagement by changing the DC offset voltage 5 volts and observing the cavity frequency changes by the expected amount (~100 Hz/volt) | Script that does this and calculates the hz/volt and shows that to the user. |
Cavity Calibration tab
| Instructions | Action Fields |
|---|---|
| Select Cavity Characterization EPICS display | Open embedded or start a script? |
| Set the cavity drive level to 15%. Set the cavity to pulse mode | The Q0 script already does this calibration - just needs to interact with the user a bit |
| Push the Pulsed SEL calibration GO button | provide button or script |
| Verify the waveforms for forward and reverse are similar to those below when the calibration is finished. If the Pulsed SEL Calibration successfully completes, the "newly calculated" values will appear in the results box. | Need the waveforms displayed on this page or window open from previous tab. Need a figure showing what waveforms should look like |
| Tweak the phase if the notch in the reverse power waveform doesn't touch the baseline | script snippet from q0 code |
| If the Q loaded is between 3e7 and 5e7, hit the "Push" buttons to push the loaded Q and the cavity scale factor to the Current value registers and push the "Save" buttons. If not, re-do the pulsed SEL calibration. If after the second try, the value is not within specification, note the value and move on to the next cavity. (Need sanity check on cavity scale factor too) | Prompt user to check, then script can push buttons. I think eventually we want the loaded Q in the CSV file. |
| Calculate the Probe Qext by pushing Go in the Probe Q calculator section. Log the Probe Q in the elog. | again with the enter value into python variable for later writing to CSV and elogging, whatever we decide |
Ramp-up Cavity in Pulsed tab
If previous "tab" is just a script, maybe make it be just a few steps on this tab.
| Instructions | Action Fields |
|---|---|
| Go to Pulsed LLRF display | Open embedded or start a script? |
| Set the drive level to 15% and RF On Time to 70 ms. Push "Go." Waveforms will appear and display the calculated cavity voltage based on the Loaded Q calculated above. | |
| Verify the radiation monitor is logging for the cavity. | |
| Slowly increase the Drive Level in 5% steps manually (clicking "Go" after each change) until the cavity amplitude reaches AUSE_SRF or the radiation level exceeds 50 MR/hr (0.5 mSv/hr) | |
| Record the maximum Drive Level used | Push button to store in python variable. |
If the cavity faults before reaching 16.6 MV or the usable amplitude:
| Maybe some buttons to help here or at least show the interlocks |
| Lower the Drive Level to 20% and turn off the RF drive. |
Ramp-up Cavity in SELAP tab
| Instructions | Action Fields |
|---|---|
| Go to Overview Screen | Open embedded or start a script? |
| Select SEL mode. Set amplitude to 5 MV and turn on RF. | buttons or script |
| Adjust the stepper tuner, if necessary to bring the detune frequency within range of the piezo control, typically 5 Hz | Show detune frequency and provide access to stepper motor controls |
| Set piezo to "Integrator" mode and verify that the piezo tracks the detune frequency. | Buttons, plots |
| Go to SELAP mode. | button |
| Increase the amplitude in 1 MV steps up to the maximum amplitude determined during the pulsed testing. | |
Push the RF Controller button at the top of the page
| Embed the display |
| Record radiation if any for each cavity under test during the SELAP operation. | Link to elog? |
Measure the microphonics during SELAP operation
| Show the waveform and values here and script to put values in elog and maybe save them for writing to CSV when done. |
Leave the cavity running for 1 hour. If the cavity trips, follow the instructions in section XXXX and begin another 1 hr run. After the third trip, note progress, set the amplitude to 5 MV and turn off the RF and SSA. | |
| At the end of the 1 hour run, run the pulsed SEL calibration to measure loaded Q (now that the FPC is warm). If different from 4.1E7+-5%, make a note in the elog so that the FPC can be adjusted during a tunnel access. | Script to measure and show results |
| Set the amplitude to 5 MV and turn off the RF and SSA. | Buttons to do things or a script |
| Record the new useable amplitude, AUSE_SRF. | buttons to do things |
| Create CSV summary file. | Pushbutton. |
12-Hour Full Cryomodule Run tab
| Instructions | Action Fields |
|---|---|
| Reset interlocks for each cavity | Script that shares problems with the user |
| Push buttons to start the 15! striptools to monitor info during the run | |
| Push the button for SRF Cavities Overview | |
| Push the button for the cryo overview display | |
| Push the button for the magnet control | |
| Set all cavities to 4 MV amplitude and turn the RF State "On." Select SELAP mode. | |
| Ramp all cavities to 16.6 MV or the useable amplitude, which ever is lower | |
| Turn on and degauss the quadrupole magnet. Turn on XCOR and YCOR. Trim all to 8.5 kG. | |
| Maintain stable operation for 12 hours | |
| Turn cavities and magnets off. |