1. 12 GeV Project Status Glenn R. Young 12 GeV Project Status
CLAS Collaboration Meeting
Jefferson Lab
June 14, 2017

2. Enhanced capabilities
12 GeV Upgrade Project
Completion of the
12 GeV CEBAF Upgrade was ranked the highest priority in the NSAC Long Range Plan.
Upgrade is designed to build on existing facility: vast majority of accelerator and experimental equipment have continued use.
New Hall
Add arc
Enhanced capabilities
in existing Halls
Add 5 cryomodules
20 cryomodules
Upgrade arc magnets
and supplies
CHL upgrade
TPC = $338M
ETC = $1.1M
Project Scope (~99.7% complete)
Doubling the accelerator beam energy - DONE
New experimental Hall D and beam line - DONE
Civil construction including Utilities - DONE
Upgrades to Experimental Hall C - DONE
Upgrades to Experimental Hall B - ~99.0%
Maintain capability to deliver lower pass beam energies: 2.2, 4.4, 6.6….

3. Physics Progress Overall
Detectors and Electronics - Complete
DAQ/Computing (software/firmware) - Complete
Beamline - Complete
Infrastructure - 99%
Hall C, D - Complete
Hall B - Install Solenoid magnet
Magnets – 99%
Hall C, D – Complete
Hall B Torus – Complete
Hall B Solenoid – 93%
KPP Runs – 100%

4. DOE OPA Review May 10-11, 2017 Major “annual” review of 12 GeV Project
From the Report of the Review:
The Installation of all detectors and detector subsystems is complete. Satisfactory operation of all detectors in Halls B, C, and D is confirmed.
All CD-4b Key Performance Parameters (KPPs) are complete.
Installation, cool-down, and power-up of all magnets in Halls B, C, and D, with the exception of the Hall B solenoid magnet, is complete. All delivered magnets are operating satisfactorily.
The Hall B solenoid magnet assembly is continuing at the vendor site.
The project team completed all activities necessary to support installation, cool-down, and power-up of the Hall B solenoid magnet when it arrives from the vendor.
However, continued schedule delays with the solenoid magnet vendor have affected schedule contingency to the point that project completion by September 30, 2017 remains uncertain.

5. Solenoid Magnet Progress (as of 3/29/17)
All Coils Wound, Potted, Assembled, Merged into One Cold Mass
Coils Spliced & Instrumented, Radiation Screens and MLI Ready
One Major Step Remains:
Suspend Cold Mass in Cryostat, Perform Closure Welding
Delivery to JLab sets schedule for Project completion
September 29, 2016
November 1, 2016
When I last addressed you

6. Transfer of Cold Mass Load to OVC
The transfer of the cold mass weight from the assembly tooling to the OVC is a critical step in the final assembly process. This task involves metrology, welding, mechanical assembly and instrumentation control to monitor the loading.
Suspension Pocket and Radial Link
Cold Mass
Support Cradle for Cryostat
Solenoid Suspension System
Shield Coil Bobbin
OVC Pocket
Cryostat
There are eight radial links supporting the cold mass assembly (4 shown here with another 4 on the other end)
The installation of the radial support links is a complex process that requires the 15+ ton cold mass to be positioned to a radial and axial tolerance of <0.125”

7. Solenoid Suspension Parts
Solenoid Suspension System
OVC Pocket
Shield Coil bobbin
Pocket
Installed suspension
Cold Mass with 2 Suspensions Visible
S2 Glass Strap 1 of 2
Clevis Eye
Steel Link with 2 roll pins

8. Faulty Clevis Eye
Correctly Manufactured Clevis Eye is a Single Solid Piece
Thin weld bead, perhaps 0.030”
Faulty clevis eye was manufactured from two pieces welded together with the weld in this location.
Bellows was attached to clevis eye and pocket, thus weld was hidden inside Bellows and therefore not visible during the quality inspection carried out by ETI.
Rod Separated from Clevis Head
Separated Clevis Head, Weld Bead Visible

9. New Clevis Eyes and Bellows
Solid Inconel Bar Stock for New Clevis Eyes
Various Machining Stages
Finished Solid Clevis Eye with New Bellows
Photos by JLab Staff Member who Observed the Work

10. Successful Transfer to Suspension 4/19/17

11. Final Assembly
The final steps in the solenoid assembly process include the installation of the face, conical and inner bore sections of the Radiation Shield, MLI and OVC components.
Portions of the radiation shield and OVC are pre-assembled to improve efficiency of final assembly.
The OVC welding is labor intensive due to the pressure vessel requirements and little space between the OVC and cold mass assemblies.

12. Radiation Shield (Re-)Installed 6/1/17

13. MultiLayer Insulation Installed 6/9/17

14. Outer Vacuum Cryostat Ends Installed 6/12/17

15. OVC Welding Started 6/13/17

16. ETI Completion Schedule
Terminate instrumentation feedthrough connectors (June 16)
Weld Cryostat Endplate, Cone, Bore Sections to Central Shell (June )
MAGNET ASSEMBLY IS COMPLETE
Load onto Shipping Frame (June )
Ship (June 27)

17. Solenoid Infrastructure at JLab
Solenoid Service Tower & U-tubes – Complete
Solenoid I&C Construction – Complete
Solenoid Hall B Infrastructure – Complete
Shipping fixture / shipping contract - Complete / in place
U-tube
SST Installed
Instrumentation and Controls Installed
Solenoid Stand
He Vaporizer
Magnet Power Supply
Solenoid Shipping Frame

18. Work at JLab after Solenoid Arrival
Arrival Checks
Receiving inspection (vacuum, electrical, instrument), place on stand
Remove shipping restraints, survey
Cryogenics SST Attachment
Place SST, splice power leads, complete piping, add radiation shield and MLI, weld SST cryostat bottom plate to solenoid, add lower thermal shield plate, attach vacuum pumping system
I&C Attachment/Setup
Add final internal sensors to SST, hook up all cables, hook up main Magnet Power Supply, test all I&C items
Cryogenic Operation Setup
Leak / Pressure / Reverse Leak checks, add U-tubes, circulate Helium
Pump-down
Cool-down
Power test

19. Key Activities: Path to CD-4B
Level 2 Milestones (PEP)
Number
 Milestone Description
 Baseline
 Projected
 Actual
Status
2-12
Hall D Equipment Installation Completed
Sep-14
Oct-14
CD-4B
2-13
Hall D Beam Commissioning Completed
Dec-14
2-27
Hall C Q1 Magnet Delivered
Jan-15 
2-28
Hall C HB Magnet Delivered
Mar-15
2-34
Hall B Torus Cold Mass Delivered
Apr-15
2-38
Conventional Facilities Complete
Dec-15
Nov-15
2-29
Hall C Dipole Magnet Delivered
Nov-16
2-30
Hall C Q2 Magnet Delivered
Oct-16 
2-31
Hall C Q3 Magnet Delivered
Mar-16
Nov-16 
2-35
Hall B Solenoid Cryostated Coil Delivered
June-17
2-32
Hall C Equipment Installation Complete
Jul-16
Feb-17 
2-33
Hall C Beam Commissioning Complete
Aug-16
Mar-17 
2-36
Hall B Equipment Installation Complete
Oct-16
Sept-17
2-37
Hall B Beam Commissioning Complete
Dec-16

20. Summary All 12 GeV Project Scope is complete except Solenoid
ETI is welding the cryostat – the LAST step before shipping
Solenoid expected to ship June 27
JLab has prepared all infrastructure for the Solenoid and is ready to receive and install it
Plans for commissioning (pump-down, cool-down, and power-up) are prepared for Physics Division ERRs
Plan to complete Solenoid Commissioning by September 30