Hall-C 12 GeV Project StatusHoward Fenker

1/30/09

Hall-C January 2009 WorkshopOverall scheduleDetector ScheduleWhat have people been working on?Reviews

Endured RecentlyFuture

What Happens Next?

12 GeV UPGRADE SCHEDULE

Detectors Schedule

shutdown shutdown Beam on

Today

SHMS Detector Stack

The SHMS Detector SystemCalorimeter: e/π separation

Side Elevation Front Elevation

Plan view

Yerevan Physics InstitutePreshower: Re-use SOSShower: 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

The SHMS Detector SystemTrigger Hodoscopes - design drawings from JMU group.

Quartz Hodoscope

North Carolina A&T

Hall C – 12 GeV University MOUs

UNIVERSITY General Collaboration MOU STATUS

Hampton Univ w/NSF detector construction Complete

James Madison w/NSF detector construction Complete

MSU NSCL w/interest in Construction Univ signature routing

North Carolina A&T w/NSF detector construction Complete

William & Mary w/NSF detector construction Complete

MOUs serve both the University and JLab—•JLab: demonstrates to DoE 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

20 DEC-2008

Still on the mandrel andinside the Mold

Potted and removedfrom Mold.

Q1 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 Geant3 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 GeV/c. Recommendations 1. Reinvestigate the pion rejection factor and the accompanying electron efficiency, also checking how well Geant3 (or preferably Geant4) describes measured pion spectra in HMS, and re-evaluate whether the pion rejection requirements quoted by prospective experiments are really necessary.

2.4 Calorimetry Comments1. 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

12/03/2008

Super High Momentum Spectrometer (SHMS) Jefferson Laboratory Hall C Carriage Structure Reference Design Alion Science and Technology, Newport News, Virginia

Super High Momentum Spectrometer (SHMS) Jefferson Laboratory Hall C Carriage Structure Reference Design Alion Science and Technology, Newport News, Virginia

Final Reference Design ConceptSupport StructureShield HouseAccess PlatformsLadders

HBQ1

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:

Q1 Magnet – R&D Done. Plan to award construction contract this SpringHB Magnet – R&D Done. Complete review next month, then award contract in Summer.Q2/Q3/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, 2012Magnets, 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