Hall-C 12 Ge V Project Status Howard Fenker

Hall-C 12 Ge. V Project Status Howard Fenker 1/30/09 Hall-C January 2009 Workshop Overall schedule Detector Schedule What have people been working on? Reviews Endured Recently Future What Happens Next?

12 Ge. V UPGRADE SCHEDULE

Detectors Schedule shutdown Today shutdown Beam on

SHMS Detector Stack Parameter SHMS Design Range of Central Momentum 2 to 11 Ge. V/c for all angles Momentum Acceptance -10% to +22% Momentum Resolution 0. 03 -0. 08% (SRD: “<0. 2%”) Scattering Angle Range 5. 5 to 40 degrees Solid Angle Acceptance >4. 5 msr for all angles (SRD: “>4. 0 msr”) Horizontal Angle Resolution 0. 5 - 1. 2 mrad Vertical Angle Resolution 0. 3 - 1. 1 mrad Vertex Length Resolution 0. 1 - 0. 3 cm Tracking Rate Capability 5 MHz Beam Capability Up to 90 µA, 11 Ge. V beam Protection from Magnetic, Cryogenic, and Fall Hazards Angle Changes Rapid, Remote, Reproducible

The SHMS Detector System Calorimeter: e/π separation Yerevan Physics Institute Preshower: Re-use SOS Shower: Gift from HERMES (NIKHEF, Vr. Univ. Amsterdam, Frascati, Yerevan, DESY) • Lead-Glass Block / PMT / Base Assemblies from HERMES • Low-Exposure modules from HERMES selected • Now On-Hand at JLab • Tests-to-Date indicate the modules are perfectly suitable for SHMS • Glass Transparency • PMT Gain • Stability Plan view Front Elevation Side Elevation

The SHMS Detector System Trigger Hodoscopes design drawings from JMU group.

Quartz Hodoscope North Carolina A&T

Hall C – 12 Ge. V University MOUs UNIVERSITY General Collaboration MOU STATUS Hampton Univ w/NSF detector construction Complete James Madison w/NSF detector construction Complete w/interest in Construction Univ signature routing North Carolina A&T w/NSF detector construction Complete William & Mary w/NSF detector construction Complete MSU NSCL MOUs serve both the University and JLab— • JLab: demonstrates to Do. E that we have a commitment for support of those necessary items that are not part of the Project budget. • University: provides evidence to administration and funding agencies that the group is an important part of a nationally-recognized effort. We will be developing MOUs with other groups, particularly those who will receive/spend Project funds, in the coming months.

Hall-C Triggers are Simple / Basic Simple trigger block diagram here Perhaps DAQ block diagram SHMS Trigger will be Similar – but it has not been detailed yet.

HB First FULL Coil Still on the mandrel and inside the Mold Potted and removed from Mold. 20 DEC-2008

Q 1 Magnet Trial-Wind completed.

Reviews 11/4/08 Director’s Project Review 12/3/08 Support Structure/Shield House Reference Design Review <<< today >>> 2/10/09 Horizontal-Bend Magnet Reference Design Review 2/23/09 Preliminary Installation Plan Review July ‘ 09? Lehman Review – Emphasis on Installation? September ’ 09 SHMS Detector Design Review

Director’s Project Review (11/4/08) Summary report for Hall-C 2. 2 Tracking Detectors Comments: None Recommendations: None 2. 3 Particle Identification Systems Comments 1. The question arose if the pi/e requirements can be reached, given that reactions of the pions will give a tail that extends till under the electron peak. A report on some studies, showing the results of simulations with Geant 3 of the PCAL and CAL spectra, was circulated. However, the results are not considered to be conclusive, as it looks as if there will be a considerable loss in the efficiency for electron detection when trying to reach the 1000: 1 pion rejection. 2. The question arose if allowing for non-sherical mirrors would result in better light collection. 3. It was not clear what PID method will be used below 4 Ge. V/c. Recommendations 1. Reinvestigate the pion rejection factor and the accompanying electron efficiency, also checking how well Geant 3 (or preferably Geant 4) describes measured pion spectra in HMS, and re-evaluate whether the pion rejection requirements quoted by prospective experiments are really necessary. 2. 4 Calorimetry Comments 1. The HERMES Pb glass radiators have had their light output degraded by less than 10% due to radiation exposure. This should not present a problem. Recommendations: None 2. 5 Trigger and Data Acquisition There are no significant issues. 2. 6 Organization and Management Issues Comments 1. Optics simulations to determine the best location should be done before finalizing the mechanical lay-out Recommendations: None

Super High Momentum Spectrometer (SHMS) Jefferson Laboratory Hall C Carriage Structure Reference Design Alion Science and Technology, Newport News, Virginia Final Reference Design Concept Support Structure Shield House Access Platforms Ladders HB 12/03/2008 Q 1

SS/SH Review (12/3/08) Summary of Draft Report OBSERVATIONS The following items are needed before the Reference Design will be ready to be sent to Procurement for the next phase: 1. Approved technical requirements document. 2. Approved interface document covering the interfaces between the support structure and the equipment on it (magnets, etc. ). 3. Drawings need to be updated to show new lead thickness and locations. They should also show the borated polyethylene outside the lead and a typical detail for mounting the poly and lead without needing to drill holes through each lead brick. 4. Provisions for removable shielding around the shield house window need to be included. 5. Preliminary In-Hall Assembly Plan, including how support structure pieces need to be sized to get them into the hall and so a crane can handle them. 6. The need for more or higher capacity bogies needs to be resolved. 7. Re-use of components should be finalized. 8. Bearing design must be finalized. 9. Areas indicated as high stress in the finite element analysis need to be resolved. 10. A convergence model run is needed to verify stresses predicted by the FEA. 11. Hand calculations of weld stresses are needed unless Alion verifies that all welds are in conformance with AWS or AISC design criteria. 12. Stairs/ladders should be shown as envelopes of what is needed. Designs on drawings do not comply with OSHA requirements. Commercial stairs will be much less expensive. 13. All calculations must be checked. CONCLUSION “The feasibility of the design for the Hall C support structure and shield house has been convincingly demonstrated. The project team is now ready to complete the Reference Design in preparation for beginning the search for a Performance Contractor. ” The Engineering Contractor delivered the corrected, final Reference Design earlier this week.

So, where do we stand? Procurements – long-lead items progressing: Q 1 Magnet – R&D Done. Plan to award construction contract this Spring HB Magnet – R&D Done. Complete review next month, then award contract in Summer. Q 2/Q 3/Dipole – bid package is on the street … plan to award late this year. Cryo-Control Reservoirs, Superconductor – award contracts this Summer. Carriage/Shield-House – Plan to award Design Contract late this year. Detectors – Designed by October – MRI detectors can then proceed. Remove SOS – May to October of 2011 (middle of Qweak run) Structure Steel, Concrete – begin arriving/installing May, 2012 Magnets, Detectors, Vacuum, Slits, etc. – install in 2012 -2013 Technical Questions: Detail of Trigger & DAQ, Signal cables, Electronics (S. Wood…) Sieve-slit / Collimator System (T. Horn…) HG Cerenkov Gas System design (? ? )

See other talks for… Spectrometer Magnets and Structure – Paul Brindza Particle I. D. – Garth Huber SHMS Optics – Tanja Horn Drift Chambers – Peter Monaghan