Superconducting Undulator (SCU) R&D for Free-Electron Laser (FEL) Systems (Argonne)

Highlights – August 01-31, 2014

• Cryostat fabrication continues to be on schedule.

SCU and Test Cryostat - General

Design concepts for an integrated SCU-based undulator system for LCLS-II are being developed in preparation for a design meeting next month.

The procurement package for the cores is being prepared.

Test Cryostat Fabrication:

The following highlights are extracted from Meyer Tool’s August monthly report:

The bi-metal shell has been successfully electropolished and is being welded, although the electropolishing took longer than planned in the schedule. The next steps at Meyer: 1) finish the nozzle and end-plate welding and braze on the Cu blocks, 2) perform final machining and testing and 3) gold plate the machined recondenser flange.

Delivery of the helium reservoir will be delayed by approximately two weeks, but that should not impact the overall cryostat schedule.

Figure 1: Helium vessel being fabricated at Meyer Tool.

The following highlights are extracted from PHPK’s August monthly report:

1. All stainless steel and copper raw materials, pre-machined, and formed parts have been received. All commercial parts are received. All materials are in-house at this time in various

states of manufacturing. 2. The stainless steel vacuum tank has rough flange rings installed. Machining of the tank

continues, including finishing the flange outer diameters and machining of all holes in the cylinder to allow nozzle installation. Figure 2 is a view of the vacuum tank being welded.

3. Pre-machining of the cover flange rings is complete and ready for welding of the dished heads.4. Pre-machining of the cover dished heads is in process.5. Installation of the vacuum tank nozzles and legs, as well as cover weldments should be

complete by mid-September. Final machining of the tank and covers can then start, with planned completion by late September. After final machining is complete, the vacuum tank and covers will be electropolished with an anticipated completion during the first week of October.

6. The 20K shield, shown in Figure 3, is 90% complete, and the 60K shield is 10% complete. It is anticipated that both shields will be complete by late September.

7. The anticipated cryostat delivery date remains 13-October-2014.

Figure 2: Vacuum tank being welded at PHPK.

Figure 3: The 20K-Shield Assembly is shown.

Issues and Actions

• None.

Schedule Status

On schedule.

90-day Forecast

• Cores will be ordered. • 4K cold mass models and drawings will be complete. • PHPK will deliver the cryostat.• Meyer Tool will deliver the helium vessel.