1. Hall C SHMS & Configuration Status
Experiment Readiness Review for Hall C
Hall C SHMS & Configuration Status
August 24-25, 2016

2. Outline
Status of SHMS
Rotation
Responsibilities & Timeline
Summary

3. Hall C SHMS Configuration – SHMS
Cryo-Control Reservoirs
Cryogenics Infrastructure
Magnet controls
In shield house
Control Cabling
Power Supplies and DC Bus
Shield House
Equipment Deck D Q3 Q2 Q1 HB
Steel Structure Rails, wheels and motors
Utilities, AC power , LCW, Cable trays, HVAC
1 x 10-3 dP/P Resolution
4 mSr Acceptance
1 to 11 GeV/c
Warm Yoke steel
Magnet Supports

4. Hall C Configuration – SHMS
PSU D Q3 Q2 Q1

5. SHMS Requirements Maximum momentum 11 GeV/c magnet settings:
SHMS HB: 3,750 Amps (max. current to date 4,000A) Q1: 2,388 A (max. current to date 2,700A) Q2: 3,661 A (max. current to date 0A) Q3: 2,434 A (max. current to date 0A)
Dipole: 3,260A (max. current to date 50A)
Angle range 5.5 degrees to 40 degrees
Perform any Hall C house cleaning required to free up angular range
Install interlocks and cabling
Perform any SHMS deferred maintenance
Replace Current lead protective covers on Q1 and HB.
Install Spectrometer Vacuum spool pieces, gauges, window and shutter
Close up the detector hut roof

6. Status of SHMS – HB and Q1
Acceptance tests of HB and Q1 were successful.
The magnets were tested at 4000 A for HB and 2700 A for Q1.
Magnetic field mappings were complete for both magnets.
Measured magnetic fields match well with those of Tosca models at various currents for both magnets.

7. Status of SHMS – Q2, Q3, and Dipole
SHMS Q2 has a ship date of Aug 26, Expected arrival at port is Sept. 21.
SHMS Q3 is being completed at Sigma Phi.
SHMS Dipole is undergoing bellows repair at Sigma Phi.
Dipole’s Cryo Can reservoir is at JLAB, being pumped and cleaned.

8. Updated HMI labels, install interlocks and cables.
SHMS has been rotated in manual mode over the entire angle range
but with no
beamline in place.
HMS rotation has been unchanged since last experiments.

9. Check Out Procedure
The SHMS magnets have or will have undergone extensive acceptance testing before operational use.
All magnets will have a detail check out before turning over controls to remote control and experiments users. See backup slide.
Rotation check out will follow previous procedures and will be one of the last checkouts before closing the hall for beam.
Shield hut door and detector shutter interlocks for the SHMS are monitored by PLC. These have to be closed/opened during final beam permit sweep of the hall.

10. Liquid Helium Inventory (l) Liquid Nitrogen Inventory (l)
ODH
Oxygen Deficiency Hazard, ODH, calculations have been re-analyzed based on the new SHMS magnets and their stored cryogen inventories.
Store cryogens of magnets in Hall C are nearly double now.
ODH remains 0 for Hall C.
HMS( 4 SC Magnets)
HMS + SHMS ( 9 SC Magnets)
Liquid Helium Inventory (l)
3570
7070
Liquid Nitrogen Inventory (l)
1363
2513
Total Cryogens (l)
4933
9583

11. Responsibilities & Timeline
Hall C engineering group and technicians are responsible for magnets (acceptance, checkout and operations) and their systems, spectrometer vacuum and spectrometer rotation.
A Hall C engineer and/or technician will be available for on call support during experiments.
Timeline for magnets – see Howard’s talk
Timeline for SHMS systems, SHMS vacuum and both spectrometer’s rotation is 4 months.

12. Summary SHMS magnets HB and Q1 ready for operations.
SHMS Q2,Q3 and Dipole yet to arrive.
Remote rotation of spectrometers waiting on construction in hall to finish. Interlock devices and cables to SHMS to be installed.
Check out procedures in place for turning over magnet and rotation controls for remote operation.

13. Backup Slides

14. HMS Magnet Check Out Procedure

15. Hall C Configuration – SHMS

16. Rotation Protection
Hardwire limited switches on floor and between spectrometers
Proximity switches on floor.
Software limits.
Only one spectrometer is allowed to move at a time.
Rail chocks placed on drive rails.
Variable Frequency Drive controller over current limits used.
Eyes on critical areas for rotating towards small angles
HMI keep alive timer on controls updating
480 AC trip breakers
Panic button and key switch enable in counting house
Cameras to monitor angle