Title | LCLSII Production Cryomodule Pre-Cool Down Checklist |
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Abstract | LCLSII Acceptance Test. This Traveler controls preparation of the cryomodule for SRF testing including cool down. |
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Revision | R0 |
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Authors | Legg, Nelson, Aderhold |
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Date | 10 June 2020 |
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NCR Emails | Nelson, Aderhold |
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Approval Names | B Legg | J Nelson | S Aderhold | A Burrill |
Approval Signatures |
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Approval Dates |
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Approval Title | Author | Reviewer | Area Physicist | System Manager |
Step No | Description | Initials | Date | Comments |
| Cryomodule Position (CM01, CM16, etc.) |
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| Before cooldown of cryomodule under test, enter housing and check module for connected cables: |
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| Cavity 2 Flange: |
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| Cavity 3 Flange: |
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| Cavity 4 Flange: |
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| Cavity 5 Flange: |
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| Cavity 6 Flange: |
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| Cavity 7 Flange: |
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| Cavity 8 Flange: |
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| Flange 'C': These are for the magnets. |
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| Flange 'D': These are for the BPM. |
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Step No | Description | Initials | Date | Comments |
| Flange 'D': These are for the cool down heater. |
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| Flange 'E': These are for the liquid level DS probes. |
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| Flange 'L': These are for the liquid level US probes. |
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| Flange 'F': These are for the temp sensors for magnet package. |
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| Flange 'K': These are for the temp sensors for Cryo. |
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17 | Flange 'B': These are for the loads for HOMs. |
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18 | Flange 'B': These are for the probe cable. |
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19 | WR650: Verify all cavity waveguides are complete. |
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20 | Verify forward and reverse power cables are connected to the directional couplers for all eight cavities |
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21 | Go to klyston gallery. In all likelihood, folks will check as many CM downstairs as possible before going upstairs, but it doesn't make for a pretty, per-CM procedure... |
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22 | Inspect cable connections to RF racks for disconnected cables. DO NOT OPEN DOORS OF RACKS. If there is a concern, note in comments and call LLRF Group. |
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Step No | Description | Initials | Date | Comments |
23 | Go to Operator console. |
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24 | Note any unresolvdisconnected PVs in the comment box. |
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25 | Push the 'Reset Interlocks' button. Note any faults which do not clear or reappear in the comments block. |
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26 | Verify that the Beamline Vacuum signal readback is correct. Record the Beamline Vacuum pressure in Ttorr. Note any problems in the comment block. |
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Step No | Description | Initials | Date | Comments |
27 | Open the Cryomodule Instrumentation display. |
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28 | Verify that the Coupler Vacuum signal readback is correct. Record the Coupler Vacuum pressure in Ttorr. Note any problems in the comment block. |
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29 | Verify that the Stepper Motor temperature readbacks is correct. At room temperature it should be about ~300K. Note any unusual readbacks in the comments block. |
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30 | Verify that the FPC Top and Bottom Temperature readbacks are correct. At room temperature it should be about ~300K. Note any unusual readbacks in the comments block. |
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Step No | Description | Initials | Date | Comments |
31 | Verify that the Helium Lines (Shield, F, E, D, C, A and B) temperature instrumentation is connected to the data acquisition systems and that the I think we could dump the "is connected ... and that the" because the same language is used in steps 29 & 30readback is correct. At room temperature they should read about ~300K. Note any unusual readbacks in the comments block. |
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32 | Verify that the Helium Vessel and HOM Copper Clamp RTD's readbacks are correct. Note any problems in the Comment block. |
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33 | Verify Downstream Liquid Level Probe and Upstream Liquid Level Probe readbacks are correct. May read "100%" at room temperature. Note any problems in the Comment block. |
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34 | Verify that Pressure Transducers (100 Torr and 5000 Torr) are properly connected to the cryomodule and that each readback is correct. Note any problems in the comment block. |
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35 | Verify that Liquid level heaters are properly connected to the cryomodule and that each readback is correct. Prior to cooldown they should read "0". |
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36 | Verify that Cavity heaters are properly connected to the cryomodule and that each readback is correct. Prior to cooldown they should read "0". Note any problems in the comment block. |
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37 | Verify that Cooldown and magnet heaters are properly connected to the cryomodule and that each readback is correct. Prior to cooldown they should read "0". Note any problems in the comment block. |
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38 | Verify that JT and CD Valve Actuator is reading back properly. |
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39 | Scroll to bottom of Cryomodule Instrumentation display |
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40 | Verify Magnet Diode'stemperatures are connected to data acquisition. Verify that each readback is correct. At room temperature all values should be ~300K. Note any problems in the Comment block. |
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41 | Verify that all preceding Cool Down Preparation steps have been completed and that all requested information has been entered into the appropriate fields. |
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42 | Transmit completed checklist to Area Physicist. |
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