Cryo controls notes from Oct 19 2017

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Notes from Kevin Mattison:

Kevin, Wes,

Thank you for meeting with us yesterday. Sonya mentioned your request for notes on the meeting to help with creating your slides for Friday. My understanding of the takeaways are below. These notes are mainly specific to the CryoControl subsystem.

Racks I spoke to the CryoControl CAM, Hamid Shoaee, and we plan to assemble the racks at SLAC instead of waiting for a contract with a vendor so we can meet the target startup date next year. You brought up the option of having JLab fabricate the racks. We can talk more about this option. Fabricating the racks at SLAC will allow us to provide immediate feedback and update drawings with changes after the first article build. I’m confident that we have a very good chance on getting everything to fit in two double-bay racks to support both cryomodules. If radiation is present in the vault, I’d much rather have our racks out of the vault and away from radiation. All of the equipment being sent to you is planned to be used in production after testing is completed at LERF. We will need a drawing that shows space expectations on where the racks are expected to be installed. Being able to access the front and back of the racks is expected.

List of matrixed point of Contacts Kevin Jordan, Alex, and others are working on finalizing the list of JLab to SLAC mapped point of contacts and areas of responsibilities.

UPS We would like to test our UPS setup, but this is still in design and likely be installed after the initial installation. We would like to have your UPS/generator backed power coming into the racks for each of our power feeds. Power requirements for for each of the two CryoControl double-bay racks: 1) Four 120 VAC feeds (8 total that covers two double-bay racks). Three feeds for rack-mounted equipment and 1 for GFCI convenience outlet that will come with rack. 2) Expect under 10 Amp draw on each of the feeds.

Remotely Accessible PC SLAC will provide a Rockwell Studio 5000 license to be installed on the Desktop PC. The Desktop PC will be provided by JLab. This PC will need to be accessible by multiple users at SLAC but it is understood not to expect concurrent RDP sessions with the Windows build. This PC should be able to access the Rockwell PLCs: CryoControl PLC, Vacuum PLC in order to support programming modifications. The PC does not need to access the CryoControl DLR, just the main PLC processor. More discussion around the agreements of when online edits will be allowed to take place later.

Cables and Connectors Although the intent was to use the exact same cables as LCLS-II production, getting the limited quantities may prove too costly. We could order additional quantities of cable to the LCLS-II cable orders and ship lengths to JLab or we can have JLab use cable with similar specifications. The shielded, twisted pair, multi-conductor cable that has the same specifications as being used in production should be a low risk difference. Connectors will be procured by JLab. JLab to pull cable and terminate to connectors

Air / valves Clean dry air available for valve control. JLab to pipe in and a connect clean dry air to positioners on JT valve body. 80 PSI available. No other valves than on the cryomodule are expected to be controlled and monitored by CryoControl. SLAC expected to provide valve positioner controller.

Fluxgates Although these were mentioned in presentations, SLAC does not currently have funding for fluxgate monitoring. SLAC will not be providing fluxgate monitors.

Feed cap/ end cap We can support the instrumentation that will be installed, but will need to be kept in the loop during design reviews so we know how to expect to integrate the additional instrumentation to our system. JLab mentioned they will include is in the review process. Currently, we should not expect to have instrumentation on the end cap.

Plant Integration Matt Cyterski and Kevin will discuss what needs to be integrated and how the integration will be completed.


File Sharing Kevin currently has a JLab wiki page holding the design information, shared publicly. https://wiki.jlab.org/lerf/index.php/Main_Page

There is also a SLAC box account being used. https://app.box.com/signup/collab/65n3ha4qj8?utm_source=trans&utm_medium=email&utm_campaign=collab%2Binvite%20new%20user

Garth mentioned he has been using GitHub. https://github.com/slaclab/scllrf

Thanks,

Kevin Mattison

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