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Hall-C 12 GeV Project Overview of SHMS detector system, Requirements, and Schedule Howard Fenker

Hall-C 12 GeV Project Overview of SHMS detector system, Requirements, and Schedule Howard Fenker for Physics Opportunities in Hall C at 12 GeV August 5, 2008. Outline. Upgrade Project Timeline Overview Summary of CD-3 (Lehman) Review – July ‘08

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Hall-C 12 GeV Project Overview of SHMS detector system, Requirements, and Schedule Howard Fenker

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  1. Hall-C 12 GeV Project Overview of SHMS detector system, Requirements, and Schedule Howard Fenker for Physics Opportunities in Hall C at 12 GeV August 5, 2008

  2. Outline • Upgrade Project Timeline Overview • Summary of CD-3 (Lehman) Review – July ‘08 • Detectors: Where to go and How to get there?

  3. DOE CRITICAL DECISION SCHEDULE

  4. CD-3 Requirements • DOE O413.3A: • Final Design • Update CD-2 Project Documentation • Independent Project (Lehman) Review • Hazard Analysis Report • Preliminary Security Vulnerability Assessment Report • Construction Project Safety and Health Plan • Final Sustainable Environmental Stewardship-High Performance Sustainable Building • Quality Assurance Program • Final Design • “Complete and review Final Design or determine that the design is sufficiently mature to start procurement or construction.” • Mature Design • Civil: Hall D Complex 100% ; Accel 95% ; CHL Addition 100% • Accelerator: >90% complete w/98% of documentation required for FY09 procurements • Physics: >90% complete, ready for FY09 procurements • Procurement Planning well-advanced • 28 APPs approved, 13 specifications complete

  5. 12 GeV UPGRADE SCHEDULE

  6. Lehman Review for CD-3 • Introduction to Hall-C • Motivation for the Upgrade • Description / Requirements / Specifications / Design Status • Detector System (this talk) • Magnets / Shield House / Support Structure (Paul Brindza) • Project Plan • FY08 R&D • PED Summary • Construction • Labor / Procurement / Schedule • Previous Reviews and Recommendations • Checkout / Testing / Commissioning • Risk Management • Summary

  7. Pion and nucleon form factors at high Q2 Deep inelastic scattering at high Bjorken x Semi-inclusive scattering at high hadron momenta Polarized and unpolarized scattering on nuclei Motivation for Hall C Upgrade • Highest Luminosity (L=1038 nucleons/cm2/s) • Pair of magnetic spectrometers (SHMS + existing HMS) • Detection of charged particles with highest momenta • Accuracy and reproducibility • Small angle capability • Very good particle identification • Compatibility with all target configurations

  8. Hall C: SHMS Design Parameters  SHMS = “Super High Momentum Spectrometer” • Key Features: • will be used together with existing spectrometer (HMS) • 3 quadrupole magnets, 1 dipole magnet • Provides easily calibrated optics and wide acceptance • Uses magnets very similar to existing ones • 1 horizontal bend magnet • Allows forward acceptance • New design, developed in collaboration w/MSU • 6 element detector package • Drift Chambers / Hodoscopes / Cerenkovs / Calorimeter • All derived from existing HMS/SOS detector designs • Rigid Support Structure / Well-Shielded Detector Enclosure • Reproduces Pointing Accuracy & Reproducibility demonstrated in HMS • Similar technical elements are all already in use at JLab

  9. SHMS Overall Design   Dipole 18.4 Degree Bend Max Field: 4.76 T EFL: 2.85 m Bender 3 Degree Bend Max Field: 3.11 T EFL: 0.75 m Q2 Q3 Max Gradient: 14.4 T/m EFL: 1.61 m Q1 Max Gradient: 10.63 T/m EFL: 1.86m

  10. Mini-Slides: Project Management

  11. SHMS Experiment Resolution Requirements * Not yet submitted to PAC Δp/p (%) Δφ (radians) Δθ (radians) 2x Spec’d Resolution & MCS Spec’d Resolution & MCS Spec’d Resolution +22% -10%

  12. SHMS PID Requirements : negative polarity • PID requirements at negative polarity are dominated by the x>1 experiment

  13. SHMS PID Requirements: positive polarity • PID requirements at positive polarity driven by Fpi-3 and pion factorization experiments • These require the heavy gas Cerenkov over the full momentum range • Kaon electroproduction requires an aerogel Cerenkov detector HG Cerenkov TOF Aerogel Cerenkov (not in project but space reserved) Discrimination Power Experiment Needs * * Fpi-3 spec’ s PID as “104 at 8GeV/c” using the HG Cerenkov. Momentum (GeV/c)

  14. Hall-C SHMS Detector System (color coding) 12 GeV Project Funded NSF MRI Funding (MOU’s are in approval stage) Gift from HERMES (testing is on-Project R&D) • Noble Gas Cerenkov • Drift Chambers • Trigger Hodoscopes • 3 Planes Scintillator Paddles • 1 Plane Quartz • Heavy Gas Cerenkov • Calorimeter • Detector Frames S1 Hodoscope Drift Chambers C4F8O Cerenkov Ar/Ne Cerenkov S2 Hodoscope Shower Counter Space Reserved for Aerogel Cerenkov

  15. The SHMS Detector System Noble Gas Cerenkov: e/π (or π /K) separation at high momenta University of Virginia • 2.5 m long gas radiator at atmospheric pressure • Argon: π threshold ~ 6 GeV/c • Adding Neon: threshold may be varied up to 12 GeV/c • Para-Terphynyl PMT window over-coating • Performance 20 photoelectrons • (worst case: pure Neon) • At low momenta: remove mirrors, • insert coupling so that the tank • becomes part of the vacuum • system – reduces MCS

  16. The SHMS Detector System Noble Gas Cerenkov Reference Design (HMS Cerenkov) 4 spherical mirrors, 45cm x 45 cm Ray-trace simulation of optics.

  17. The SHMS Detector System Drift Chambers: charged particle tracking; momentum & angle measurement Design of Drift Chambers is straightforward re-scaling of existing SOS chambers and HKS chambers – both built by Hampton University Hampton University NSF MRI Funding

  18. The SHMS Detector System Drift Chambers: straightforward re-scaling of existing SOS chambers – demonstrated to achieve 180 µm resolution.

  19. The SHMS Detector System • Trigger Hodoscopes: basic trigger; efficiency determination. • 3 Planes Scintillator Paddles + 1 Plane Quartz Bars S1X: 12 bars 8cm x 110 cm x 5mm S1Y: 14 bars 8cm x 90cm x 5mm S2X: 14 bars 8cm x 140cm x 5mm S2Y: 10 quartz bars: 11cm 115cm x 2.5 cm 0.5 cm overlap / 2 PMTs on each bar James Madison University NSF MRI Funding North Carolina A&T NSF MRI Funding

  20. The SHMS Detector System Trigger Hodoscopes Mechanical Design is a re-scaling of existing HMS/SOS design 0.5cm paddle overlap – all paddles

  21. The SHMS Detector System Heavy Gas Cerenkov: π/K separation for momenta > 3.4 GeV University of Regina • Gas choice now C4F8O (instead of C4F10) • Widely used in semiconductor industry • Many commercial suppliers • Much less expensive than C4F10 • Extensively studied by BTeV • Stable, non-toxic, non-explosive, non-reactive • Does not destroy ozone SLD ECRID Gas System Side Elevation Line Drawing

  22. The SHMS Detector System Calorimeter: e/π separation • 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 Yerevan Physics Institute Preshower: Re-use SOS Shower: Gift from HERMES Plan view Front Elevation Side Elevation

  23. The SHMS Detector System Calorimeter: 1 p.e. peak Pb-Glass and PMT performance of HERMES tubes is still very good. R&D Task under CR08-028 20 p.e. peak Philips XP3461 HERMES PMT Virgin PMT Pb-Glass transmission measured – <10% degradation since 1994

  24. SHMS Shield House Shield House: low radiation flux for detectors & electronics Graph shows results of Simulations normalized to measurements in HMS

  25. SHMS Detector Electronics We Expect to find enough of these in our stock Re-design of calorimeter to use HERMES blocks increased the channel count significantly, leaving us without enough analog summing units. Anticipate using Change-Request process to shift funds from WC preamps (now located in-house) to procurement of summers.. Above inventory was prepared in response to Recommendation C-Det08-4: SHMS Detector Review (Jan 2008)

  26. Hall-C Upgrade - Other • Beamline Upgrades on Project: • Moller Polarimeter: connect existing power supply to existing magnet • Compton polarimeter: elevation change & vacuum connections • Arc Energy Measurement: 12GeV funds techs to map magnets; Hall-C staff analyzes data • Downstream Beamline to Dump: designed – build pipe & stands • Scattering Chamber: on hand – need only to modify vacuum connections • SHMS Quadrupole Magnets Measurements • Determine optical centerlines • Measure multipole contributions to quads

  27. Hall C R&D (WBS 1.1.4) All R&D activities will be complete before September 30, 2008.

  28. Mini-Slides: Project Management

  29. Mini-Slides: Project Management

  30. Detectors Schedule

  31. CD-3 Requirement: Final Design Review • JLab convenes Subsystem Design & Safety reviews • 3 reviews for Hall C equipment systems in 2008: • Sep 2006: Halls B & C Superconducting Magnet Review • Jan 2008: Hall C Detector Integration Review • Apr 2008: Halls B & C Superconducting Magnet Review (this closes “07 IPR 14” recommendation) • May 2008: Hall C Support Structure & Shield House Review Responses to all recommendations are being “tracked”

  32. JLab Design Review 2006 Recommendations Recommendation SCMag-2: Spectrometer Superconducting Magnets (Sept 2006) “Study options for alternative designs that reduce heat load in the infringed portion of the HB magnet.”Status:A helium-bath option has been evaluated in collaboration with Michigan State University. The amount of heat expected (based on a series of test measurements) is small (10-20%) as compared to the cooling capability of the helium-bath design. Closed(See Paul’s talk) Recommendation SCMag-3: Spectrometer Superconducting Magnets (Sept 2006) “Consider requirements for radiation-hard materials for the HB magnet.”Status: Radiation-hard materials were investigated. Test measurements and calculations demonstrate they are not required. Closed (See Paul’s talk)

  33. JLab Design Review 2006/8 Recommendations Hall-C Hall-B Recommendation SCMag-5:Spectrometer Superconducting Magnets (Sept 2006) “Consider use of alternative superconductors and configurations for the HB and Solenoid.”Status:Alternative superconductors were considered, and the existing superconductor appear to give the best cost-performance optimization. For the Solenoid, an additional design study by CEA Saclay (France) investigated configurations also based on alternative superconductors with results reported in June 2008. Closed (See Paul’s talk) Recommendation SC-Mag08-1:SC Magnet Review (April 2008) “Relax the HB magnet procurement priority and require a reference design.” Status: The HB magnet procurement schedule has been delayed in order to allow additional time for completion and review of a full reference design prior to initiating procurement. The reference design has been started and is expected to be completed by October 2008, with a final design review planned for 1QFY09. Closed (CR08-042 provides Reference Design by 9/30)

  34. JLab Design Review 2008 Recommendations Recommendation C-Det08-1:SHMS Detector Review (Jan 2008) “Identify key experiments to be done by SHMS and ensure that all detector concepts meet physics driven requirements. Assure that the technical specifications, and performance of each subsystem in the tests following construction, are consistent with the physics driven requirements (for example, light output from the quartz detector plane intended for triggering) .” Status: Such technical specifications are one of the charges to the annual 12 GeV related Program Advisory Committee meetings. A full overview of Hall C approved experiments by the 2006 and 2007 12 GeV Program Advisory Committee meetings (30 & 32) with detailed physics requirements and associated performance specifications for the detectors is being collected, and will be ready by the July 2008 IPR review. Open Summary of spec’s was shown in opening slides.

  35. JLab Design Review 2008 Recommendations Recommendation C-Det08-2:SHMS Detector Review (Jan 2008)“After all engineering designs are completed, a final review should be held prior to major procurements or construction.” Status: A detector final engineering design review has been scheduled for 4QFY09. Open (but recall detector schedule slide) Recommendation C-Det08-3: SHMS Detector Review (Jan 2008)“The project would benefit from involvement of an experienced Hall-C integration engineer to review individual subsystem designs and provide oversight during assembly and installation.” Status: A Hall C staff scientist with extensive detector-system experience has taken on this responsibility. Closed

  36. JLab Design Review 2008 Recommendations Recommendation C-Det08-4: SHMS Detector Review (Jan 2008) “A detailed inventory of all electronics to be used for this detector system must be developed and documented. Access to the electronics by the groups who will build individual subsystems is important to assure that technical requirements of each subsystem are met.” Status: An inventory of electronics existing within the Hall-C infrastructure is ongoing and will be ready in July 2008. The electronics needs for individual subsystem testing at universities is being evaluated and will be captured in the respective MOUs. Open (but recall inventory shown earlier)

  37. Mini-Slides: Checkout Plans / Risk Mgt.

  38. Lehman-Review SUMMARY • SHMS is well-suited to the requirements of experiments • Angle & Momentum Coverage • Resolution • Particle-ID Discrimination Power • Magnet System / Support / Shielding (Paul’s talk) • Detector System design • Conservative • Based on demonstrated (existing) technologies • Significant support from experienced user community • Integration plan in place • Basic designs complete • Safety is integrated from the beginning • e.g. choice of Cerenkov gas, design of structure • R&D Performed to lower technical risks (complete by Sept. ‘08) • Calorimetry – re-use HERMES blocks (after testing!) • Magnets – HB heating, cable tests, coil winding – (Paul’s talk) • PM & EVMS tools are in use to direct and track project performance • All FY09 Major Procurements have Approved APPs. One solicitation issued. READY AND ANXIOUS TO START CONSTRUCTION !

  39. The Future for SHMS Detectors • Where are we now? • All detectors are “prototyped” and • Have “Reference Designs” in the sense that They are ALL straightforward re-designs of existing hardware. • Where do we need to go? • FINAL DESIGN Review by 9/30/09 • INSTALLATION during 2/1/13 – 8/31/13 • FINAL CHECKOUT on SHMS (no beam) by 2/28/14 • READY FOR BEAM by 10/1/14 • PHYSICS BEGINS 4/1/15

  40. The Future for SHMS Detectors • FINAL DESIGN Review by 9/30/09 • Quarterly Progress Meetings: • October ’08 (should set date now – propose October 1, 2008) • Final definition of active detector volumes • Draft of each detector’s reserved space • Plan and Elevation views with real dimensions for active volumes or components; draft layout for frames, supports, PMTs, front-end electronics, cables, piping, etc. • Mike Fowler is working to provide draft layout data now. • February ’09 • Final definition of reserved space in detector stack • Plan and Elevation Assembly drawings with full dimensioning – all on-detector items. • Proposed detailed plumbing/wiring layout. • Provide specifications for supporting services: • Readout electronics, HVPS, LVPS rack space requirements, number of NIM/FB/CAMAC/VME slots and rough locations. • Cable list (from/to, how many, what type, patch panels, …) • Utilities & Services Requirements: AC power, gas, vents, plumbing. • Other support hardware space needs: pumps, refrigerators, manifolds, distribution systems, lasers, etc. • June ’09 • Final resolution of interferences. • Detail of mounting and alignment systems • Layout of all supporting hardware, cable/plumbing routing & supports, patch panel and electronics locations.

  41. Summary • With CD-3 almost behind us we are “Ready for Construction” • Now the FUN begins! • DETECTOR CONSTRUCTION • MRI-Funded Detectors: 2009 – 2011 • 12GeV-Funded Detectors: 2012 • INSTALLATION during 2/1/13 – 8/31/13 • FINAL CHECKOUT on SHMS (no beam) by 2/28/14 • READY FOR BEAM by 10/1/14 • PHYSICS BEGINS 4/1/15

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