Hall-C 12 Ge V Project Overview of SHMS

Hall-C 12 Ge. V Project Overview of SHMS detector system, Requirements, and Schedule Howard Fenker for Physics Opportunities in Hall C at 12 Ge. V August 5, 2008 Thomas Jefferson National Accelerator Facility Page 1 Hall-C

Outline • Upgrade Project Timeline Overview • Summary of CD-3 (Lehman) Review – July ‘ 08 • Detectors: Where to go and How to get there? Thomas Jefferson National Accelerator Facility Page 2 Hall-C

DOE CRITICAL DECISION SCHEDULE Lehman-07 EIR-07 Lehman-08 CD-0 Mission Need 2 QFY 04 (A) CD-1 Preliminary Baseline Range 2 QFY 06 (A) CD-2 Performance Baseline 4 QFY 07 1 QFY 08 (A) CD-3 Start of Construction 4 QFY 08 CD-4 A Accelerator Project Completion and Start of Operations NA 1 QFY 15* 1 QFY 15 CD-4 B Experimental Equipment Project Completion and Start of Operations 3 QFY 15 Thomas Jefferson National Accelerator Facility Page 3 Hall-C

CD-3 Requirements DOE O 413. 3 A: 1. Final Design 2. Update CD-2 Project Documentation Final Design “Complete and review Final Design or determine that the design is sufficiently mature to start procurement or construction. ” 3. Independent Project (Lehman) Review • 4. Hazard Analysis Report Mature Design – Accelerator: >90% complete w/98% of documentation required for FY 09 procurements – Assessment Report Civil: Hall D Complex 100% ; Accel 95% ; CHL Addition 100% – 5. Preliminary Security Vulnerability Physics: >90% complete, ready for FY 09 procurements 6. Construction Project Safety and Health Plan 7. Final Sustainable Environmental Stewardship-High Performance Sustainable Building 8. Quality Assurance Program • Procurement Planning well-advanced – 28 APPs approved, 13 specifications complete Thomas Jefferson National Accelerator Facility Page 4 Hall-C

12 Ge. V UPGRADE SCHEDULE Thomas Jefferson National Accelerator Facility Page 5 Hall-C

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 – FY 08 R&D – PED Summary – Construction • Labor / Procurement / Schedule • Previous Reviews and Recommendations • Checkout / Testing / Commissioning • Risk Management • Summary Thomas Jefferson National Accelerator Facility Page 6 Hall-C

Motivation for Hall C Upgrade • Pion and nucleon form factors at high Q 2 • Deep inelastic scattering at high Bjorken x • Semi-inclusive scattering at high hadron momenta • Polarized and unpolarized scattering on nuclei • Highest Luminosity (L=1038 nucleons/cm 2/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 Thomas Jefferson National Accelerator Facility Page 7 Hall-C

Hall C: SHMS Design Parameters SHMS = “Super High Momentum Spectrometer” • Key Features: • 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 • SHMS Design Reproduces Pointing Accuracy & Reproducibility demonstrated in HMS – Similar technical elements are all already in use at JLab 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 – will be used together with existing spectrometer (HMS) – 3 quadrupole magnets, 1 dipole magnet • Parameter Rapid, Remote, Reproducible Thomas Jefferson National Accelerator Facility Page 8 Hall-C

SHMS Overall Design Dipole 18. 4 Degree Bend Max Field: 4. 76 T EFL: 2. 85 m Q 2 Q 3 Max Gradient: 14. 4 T/m EFL: 1. 61 m Q 1 Max Gradient: 10. 63 T/m EFL: 1. 86 m Thomas Jefferson National Accelerator Facility Bender 3 Degree Bend Max Field: 3. 11 T EFL: 0. 75 m Page 9 Hall-C

Mini-Slides: Project Management Thomas Jefferson National Accelerator Facility Page 10 Hall-C

SHMS Experiment Resolution Requirements Experiment p (Ge. V) Δp/p (%) Δθ (rad) Δφ (rad) Pion Form Factor 2. 2 -8. 1 2 x 10 -3 1. 5 x 10 -3 Transition Form Factors* 1. 0 -8. 5 1 x 10 -3 1. 0 x 10 -3 * Not yet submitted to PAC Δp/p (%) Δφ (radians) Δθ (radians) 2 x Spec’d Resolution & MCS Spec’d Resolution +22% -10% Thomas Jefferson National Accelerator Facility Page 11 Hall-C

SHMS PID Requirements : negative polarity Experiment Req’d e-: π- Disc. E 12 -06 -101 2. 2 - 8. 1 4. 5 • 103: 1 E 12 -06 -104 5. 4 - 5. 8 103: 1 E 12 -07 -103 2. 4 - 8. 5 E 12 -06 -105 (x>1) Spec’d NG Cerenkov Spec’d Calorimeter Total Expected 103: 1 50: 1 >200: 1 >104: 1 4. 8 -10. 6 5 • 103: 1 2. 2 - 6. 8 103: 1 (HMS Cerenkov gives up to 300: 1 now) (1000: 1 above 6 Ge. V/c) E 12 -06 -110 (c) E 12 -06 -121 • p (Ge. V) 6. 3 - 7. 5 >102: 1 PID requirements at negative polarity are dominated by the x>1 experiment Thomas Jefferson National Accelerator Facility Page 12 Hall-C

SHMS PID Requirements: positive polarity p (Ge. V) Req’d π+ : (K, p) Discrimination E 12 -06 -101 (Fpi-3) 2. 2 - 8. 1 104: 1 * E 12 -06 -107 (c) 5. 1 - 9. 6 104: 1 E 12 -07 -103 (pion factorization) Discrimination Power Experiment 2. 4 - 8. 5 103: 1 HG Cerenkov TOF Aerogel Cerenkov (not in project but space reserved) Spec’d HG Cerenkov See Chart 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 Experiment Needs * * Fpi-3 spec’ s PID as “ 104 at 8 Ge. V/c” using the HG Cerenkov. Momentum (Ge. V/c) Thomas Jefferson National Accelerator Facility Page 13 Hall-C

Hall-C SHMS Detector System (color coding) Noble Gas Cerenkov 12 Ge. V Project Funded Drift Chambers NSF MRI Funding (MOU’s are in Trigger Hodoscopes approval stage) • 3 Planes Scintillator Paddles • 1 Plane Quartz Gift from HERMES (testing is on-Project R&D) Heavy Gas Cerenkov Calorimeter S 1 Hodoscope Drift Chambers Detector Frames C F O Cerenkov Ar/Ne Cerenkov 4 8 S 2 Hodoscope Shower Counter Space Reserved for Aerogel Cerenkov Thomas Jefferson National Accelerator Facility Page 14 Hall-C

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 Ge. V/c • Adding Neon: threshold may be varied up to 12 Ge. V/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 Thomas Jefferson National Accelerator Facility Page 15 Hall-C

The SHMS Detector System Noble Gas Cerenkov Reference Design (HMS Cerenkov) 4 spherical mirrors, 45 cm x 45 cm Ray-trace simulation of optics. Thomas Jefferson National Accelerator Facility Page 16 Hall-C

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

The SHMS Detector System Drift Chambers: straightforward re-scaling of existing SOS chambers – demonstrated to achieve 180 µm resolution. Thomas Jefferson National Accelerator Facility Page 18 Hall-C

The SHMS Detector System Trigger Hodoscopes: basic trigger; efficiency determination. • 3 Planes Scintillator Paddles + 1 Plane Quartz Bars S 1 X: 12 bars 8 cm x 110 cm x 5 mm S 1 Y: 14 bars 8 cm x 90 cm x 5 mm S 2 X: 14 bars 8 cm x 140 cm x 5 mm James Madison University NSF MRI Funding S 2 Y: 10 quartz bars: 11 cm 115 cm x 2. 5 cm North Carolina A&T NSF MRI Funding 0. 5 cm overlap / 2 PMTs on each bar Thomas Jefferson National Accelerator Facility Page 19 Hall-C

The SHMS Detector System Trigger Hodoscopes Mechanical Design is a re-scaling of existing HMS/SOS design 0. 5 cm paddle overlap – all paddles Thomas Jefferson National Accelerator Facility Page 20 Hall-C

The SHMS Detector System Heavy Gas Cerenkov: π/K separation for momenta > 3. 4 Ge. V University of Regina Gas choice now C 4 F 8 O (instead of C 4 F 10) • Widely used in semiconductor industry • Many commercial suppliers • Much less expensive than C 4 F 10 • Extensively studied by BTe. V • Stable, non-toxic, non-explosive, non-reactive • Does not destroy ozone SLD ECRID Gas System Side Elevation Line Drawing Thomas Jefferson National Accelerator Facility Page 21 Hall-C

The SHMS Detector System Calorimeter: e/π separation Yerevan Physics Institute Preshower: Re-use SOS Shower: Gift from HERMES • 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 Thomas Jefferson National Accelerator Facility Page 22 Hall-C

The SHMS Detector System Calorimeter: Pb-Glass and PMT performance of HERMES tubes is still very good. 1 p. e. peak R&D Task under CR 08 -028 20 p. e. peak HERMES PMT Philips XP 3461 Virgin PMT Pb-Glass transmission measured – <10% degradation since 1994 Thomas Jefferson National Accelerator Facility Page 23 Hall-C

SHMS Shield House: low radiation flux for detectors & electronics Graph shows results of Simulations normalized to measurements in HMS Thomas Jefferson National Accelerator Facility Page 24 Hall-C

SHMS Detector Electronics SHMS Electronics Channels Needed vs. Channels on-hand WC Channels Preamps WC TDCs Splitters NG Cerenkov Digital Delay Analog Sums PMT TDCs ADCs Disc Scaler HV Logic FB NIM VME 4 0 0 4 4 4 Drift Chambers 1404 0 0 0 8 Sc Hodoscopes 100 0 0 100 100 100 Qtz Hodoscope 20 0 0 20 20 4 0 0 4 4 4 Preshower 32 0 0 32 32 33 0 32 32 Calorimeter 224 0 0 224 240 0 224 3 HG Cerenkov Control/Trig 40 32 1 30 1 1 1 SHMS Needs 1404 384 281 128 384 160 32 392 30 2 4 1 Inventory: 1472 1536 384 272 128 192 536 244 176 752 32 2 4 1 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-Det 08 -4: SHMS Detector Review (Jan 2008) Thomas Jefferson National Accelerator Facility Page 25 Hall-C

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: 12 Ge. V 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 Thomas Jefferson National Accelerator Facility Page 26 Hall-C

Hall C R&D (WBS 1. 1. 4) YEAR R&D Report # 2007 Halls A/C-6 Hall C Study of Alternative Calorimeter Configurations. 2007 Halls A/C-7 Complete testing of the cable following re-shaping. Verify the reduction in critical current is less than 10%. 2007 Halls A/C-8 Design, build and test a scale cross section model of the SHMS HB coil suitable for testing. 2007 Halls A/C-9 Complete construction and assembly of a working prototype. Verify that a response of 80 photoelectrons is achievable with the chosen quartz/photomultiplier combination. 2008 Halls A/C-10 Progress on the Horizontal Bend Magnet trial wind. (see Paul’s talk) 2008 TBD Completion of the Horizontal Bend Magnet trial wind and testing. (see Paul’s talk) 2008 TBD Selection of optimal HERMES lead-glass blocks and PMTs for the SHMS Calorimeter (see Vardan’s talk) (report drafted) Task Description All R&D activities will be complete before September 30, 2008. Thomas Jefferson National Accelerator Facility Page 27 Hall-C

Mini-Slides: Project Management Thomas Jefferson National Accelerator Facility Page 28 Hall-C

Mini-Slides: Project Management Thomas Jefferson National Accelerator Facility Page 29 Hall-C

Detectors Schedule Thomas Jefferson National Accelerator Facility Page 30 Hall-C

CD-3 Requirement: Final Design Review • JLab convenes Subsystem Design & Safety reviews • 3 reviews for Hall C equipment systems in 2008: – Sep 2006: – Jan 2008: – Apr 2008: Halls B & C Superconducting Magnet Review Hall C Detector Integration Review 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” Thomas Jefferson National Accelerator Facility Page 31 Hall-C

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) Thomas Jefferson National Accelerator Facility Page 32 Hall-C

JLab Design Review 2006/8 Recommendations Recommendation SCMag-5: Spectrometer Superconducting Magnets (Sept 2006) “Consider use of alternative superconductors and configurations for the HB and Solenoid. ” Hall-C Hall-B 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-Mag 08 -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 1 QFY 09. Closed (CR 08 -042 provides Reference Design by 9/30) Thomas Jefferson National Accelerator Facility Page 33 Hall-C

JLab Design Review 2008 Recommendations Recommendation C-Det 08 -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 Ge. V related Program Advisory Committee meetings. A full overview of Hall C approved experiments by the 2006 and 2007 12 Ge. V 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. Thomas Jefferson National Accelerator Facility Page 34 Hall-C

JLab Design Review 2008 Recommendations Recommendation C-Det 08 -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 4 QFY 09. Open (but recall detector schedule slide) Recommendation C-Det 08 -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 Thomas Jefferson National Accelerator Facility Page 35 Hall-C

JLab Design Review 2008 Recommendations Recommendation C-Det 08 -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. SHMS Electronics Channels Needed vs. Channels on-hand WC Channels Preamps WC TDCs Open (but recall inventory shown earlier) NG Cerenkov 4 0 0 Drift Chambers 1404 Sc Hodoscopes 100 0 0 Qtz Hodoscope 20 0 0 4 0 0 Preshower 32 0 Calorimeter 224 HG Cerenkov Digital Delay Splitters 4 Analog Sums PMT TDCs 4 ADCs Disc Scaler HV 4 Logic FB NIM VME 4 4 0 0 0 100 100 100 20 20 20 4 4 4 0 32 32 33 0 32 32 0 0 224 240 0 224 3 Control/Trig 4 8 40 30 1 1 1 SHMS Needs 1404 384 281 128 384 160 32 392 30 2 4 1 Inventory: 1472 1536 384 272 128 192 536 244 176 752 32 2 4 1 Thomas Jefferson National Accelerator Facility Page 36 32 1 Hall-C

Mini-Slides: Checkout Plans / Risk Mgt. Thomas Jefferson National Accelerator Facility Page 37 Hall-C

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 FY 09 Major Procurements have Approved APPs. One solicitation issued. READY AND ANXIOUS TO START CONSTRUCTION ! Thomas Jefferson National Accelerator Facility Page 38 Hall-C

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 Thomas Jefferson National Accelerator Facility Page 39 Hall-C

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. Thomas Jefferson National Accelerator Facility Page 40 Hall-C

Summary • With CD-3 almost behind us we are “Ready for Construction” • Now the FUN begins! • DETECTOR CONSTRUCTION – MRI-Funded Detectors: 2009 – 2011 – 12 Ge. V-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 Thomas Jefferson National Accelerator Facility Page 41 Hall-C