Thomas Jefferson National Accelerator Facility Page 1 John LeRose Independent Project Review of 12 GeV Upgrade Jefferson Lab September 22-24, 2009 Physics Hall A WBS 1.4.1

Thomas Jefferson National Accelerator Facility Page 2 Outline Introduction to Hall A Upgrades for 12 GeV –Scope –Hall A Physics Program Specific Upgrades –Møller Polarimeter –Compton Polarimeter –Arc Energy Measurement Overall schedule –Procurements –Labor In-house installation review EVMS Risk Management Summary

Thomas Jefferson National Accelerator Facility Page 3 HALL A COST SUMMARY Cost to sufficiently upgrade beamline instrumentation to handle 11 GeV beam Compton and Møller Polarimeters: Modifications to beam handling to accommodate stiffer beam Arc Energy Measurement: Cross calibration of 8 arc magnets with “9 th magnet” at higher fields than before.

Thomas Jefferson National Accelerator Facility Page 4 PRESENT HALL A - SCHEMATIC VIEW

Thomas Jefferson National Accelerator Facility Page 5 Group Leader: Kees de Jager 10 Staff Scientists 2 Post-Docs 7 Technicians 4 Designers One shared engineer The Hall A Collaboration: –~250 members –Representing 42 Institutions Hall A

Thomas Jefferson National Accelerator Facility Page 6 Hall A - 12 GEV UPGRADE PHYSICS PROGRAM Continue using the two High-Resolution Spectrometers (HRS) for conventional nuclear physics (A(e,e’p), short-range correlations) Extend physics reach with a combination of general & specialized detector systems [Septum magnets, BigBite spectrometer, BigCal calorimeter, DVCS detector, G E n neutron detector, HKS/HES spectrometers & Super BigBite (SBS)] Capability for one-of-a-kind experiments (e.g. Parity violation experiments & Hypernuclear physics)

Thomas Jefferson National Accelerator Facility Page 7 Already Approved Hall A Experiments Exp. #TitlePAC #Status Measurement of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV30A Measurement of the Neutron Asymmetry A1n in the Valence Quark Region using 8.8 and 6.6 GeV Beam Energies and BigBite spectrometer in Hall A30A Precision Measurement of the Proton Elastic Cross Section at High Q 2 32A Large Acceptance Proton Form Factor Ratio Measurements at 13 and 15 (GeV/c) 2 Using Recoil Polarization Method32A An Ultra-precise Measurement of the Weak Mixing Angle using Møller Scattering34A Measurement of the Neutron Electromagnetic Form Factor Ratio GEn/GMn at High Q 2 34A Neutron Magnetic Form Factor at Q 2 up to 18 (GeV/c) 2 34A Total Measurement of the F2n/F2p, d/u Ratios and A=3 EMC Effect in DIS off the Tritium and Helium Mirror Nuclei30CA Precision Measurement of Parity-violation in Deep Inelastic Scattering Over a Broad Kinematic Range34CA Semi-Inclusive Charged π and k Production from Polarized 3He34CA

Thomas Jefferson National Accelerator Facility Page 8 Hall A “12 GeV” Upgrades Upgrade beam-line instrumentation to measure beam polarization and energy up to 11 GeV System Present * “6 GeV” Capability 11 GeV Requirements (SRD) Møller Polarimeter± 3% # ± 3% Compton Polarimeter± 3% # ± 3% ARC Energy Measurement System ± 2 x ± 5 x # With ongoing improvements of 6 GeV capability, driven by the parity program, expect to achieve ± 1% * Compton will already go to 8 GeV

Thomas Jefferson National Accelerator Facility Page 9 Add quadrupole Q1’ New field-exclusion insert Raise detector by 100 mm WBS BEAMLINE - Møller Polarimeter

Thomas Jefferson National Accelerator Facility Page 10 WBS M øller Polarimeter A M ø ller Polarimeter 11GEV Assembly 1 of 50 drawings

Thomas Jefferson National Accelerator Facility Page GeV upgrade builds on 6 GeV changes (infrared to green laser) Raise D2, Optical Cavity, Photon Detector, & D3 by 82 mm Rebuild vacuum line Add motion mechanism to electron detector WBS BEAMLINE - Compton Polarimeter Needed for 6 GeV operations, already done.

Thomas Jefferson National Accelerator Facility Page 12 WBS BEAMLINE - Compton Polarimeter

Thomas Jefferson National Accelerator Facility Page 13 Compton Polarimeter Electron Detector: Installed, Commissioning underway as part of 6 GeV ops Optical Cavity with green laser under development

Thomas Jefferson National Accelerator Facility Page 14  Magnetic Rigidity Bend Angle α is determined with carefully positioned and maintained Harps Integral of each magnet relative to the 9 th magnet was measured All 9 magnets are powered in series (always!) 9 th is kept in a climate controlled “shed” “The Mapper” is used to measure the integral in the 9 th Total integral is inferred from the 9 th + cross calibration WBS BEAMLINE - ARC Energy Measurement Leave the magnets and mapper alone. Upgrade the arc dipole magnets power supply Cross calibrate 8 arc dipoles and the 9 th using the unmodified mapper*

Thomas Jefferson National Accelerator Facility Page 15 Installation Review Held an internal installation review in February 2009 Local experts reviewed installation plans for each Hall Re Hall A: “All three efforts are about the same size as a typical experimental change-out during 6 GeV operations and don’t represent anything particularly challenging in their scope…” Arc Magnet Calibration Compton/Møller

Thomas Jefferson National Accelerator Facility Page 16 AC_INST09-1 Halls A&C Interim Installation Review (Feb 2009) The Hall A CAM and work coordinator need to reconcile milestones, durations, and manpower between the presented detailed installation schedule and the P3e schedule. This will be reconciled in FY10, well ahead of the Hall A installation work. Recommendations from the Internal Accelerator and Physics Project Design Reviews Updated September 1, 2009 Status: 130 recommendations total, 68 closed, 62 open Rec #ReviewRecommendationResponse

Thomas Jefferson National Accelerator Facility Page 17 WBS Construction Schedule

Thomas Jefferson National Accelerator Facility Page 18 Hall A Procurement/Expense Profile Purchase assorted parts and hardware needed for Compton and Møller Upgrades Note: Includes $1K of Purchased Labor

Thomas Jefferson National Accelerator Facility Page 19 LABOR PROFILE BY SKILL TYPE Arc Dipole calibrations Møller and Compton beamline work

Thomas Jefferson National Accelerator Facility Page 20 Compton Manpower and schedule Preliminary work starts in 2011 with the bulk in 2012 and some trickle over into Electrician3 MW1 MW Electrical Technician1 MW2 MW1 MW Mechanical Technician21 MW7 MW Staff Scientist3 MW5 MW2 MW Paid University Staff2 MW 1 MW Paid University Students4 MW5 MW1 MW

Thomas Jefferson National Accelerator Facility Page 21 Møller Manpower and Schedule Bulk of the work is done in 2012 with some trickle over into 2013 Time/Manpower Estimate: Electrician1 MW Electrical Tech1 MW Staff Scientist3 MW1 MW Computer Scientist1 MW Visiting Users3 MW1 MW Not worth the cost of processing a change request

Thomas Jefferson National Accelerator Facility Page 22 Arc Energy Calibrations Schedule and Manpower Calibration effort involves multiple moves of the 8 arc dipoles interchanging with the 9 th magnet. Time/Manpower Estimate: Work begins Q3 FY 11 (6 mo “down before the down”) 2011 Electrical Technician2 MW Mechanical Technician15 MW Staff Scientist12 MW Paid University Staff12 MW Paid University Students15 MW

Thomas Jefferson National Accelerator Facility Page Hall A Construction Earned Value

Thomas Jefferson National Accelerator Facility Page 24 Hall A: Risk Management Likelihood AssessmentImpact Assessment WBS ItemDescription Risk RatingTechnicalCostScheduleTechnicalCostSchedule 1.4 Construction Upgrade Hall A, B & C 1.4.1Construction Hall A Beamline Low Risk Assessment Matrix

Thomas Jefferson National Accelerator Facility Page 25 SUMMARY All upgrades are relatively modest modifications to existing, successful systems Design work is completed Have revisited Møller and Compton Manpower for 2012 –Very small perturbation Jlab 12 GeV Halls A&C Interim Installation Review (2/25-26/2009) report re Hall A: “All three efforts are about the same size as a typical experimental change-out during 6 GeV operations and don’t represent anything particularly challenging in their scope…”

Thomas Jefferson National Accelerator Facility Page 26 Backup slides

Thomas Jefferson National Accelerator Facility Page 27 Hall A Cost Delta Contract Awards since June 30, 2009: NA

Thomas Jefferson National Accelerator Facility Page 28 Hall A Compton Polarimeter Upgrade Goal: Green Fabry-Perot Cavity Twice the Analyzing power of present IR system 532 nm Green laser 1.5 kW Fabry-Perot Cavity Provide 1% beam polarimetery from 1 to 12 GeV. High precision experiments, such as PREX, are feasible with this upgrade Electron Detector High resolution tracking to improve energy resolution. 192 channels of 240  m pitch Silicon micro-strip detector Photon Detector Single crystal high-yield calorimeter Counting and Integrating data acquisition Participants: Jefferson Lab, Saclay, Syracuse, Clermont-Ferrand, UVa, Duke, Carnegie-Mellon Scope:

Thomas Jefferson National Accelerator Facility Page 29 Compton Upgrade Status Fabry-Perot Cavity (Jlab, Syracuse) –Laser Lab for cavity development established –Cavity mechanics assembled and tested –Laser and optics setup completed –Locking the cavity to the laser successful –Power gain optimization in progress Electron Detector (Clermont-Ferrand) Silicon micro-strips tests completed Detector Chamber fabricated Support structure in final design Installation in August Photon Detector (Carnegie-Mellon) GSO crystal procured from Hitachi Calorimeter assembly in progress FADC based integrating DAQ in development Electron Detector Installation and Commissioning in 2008

Thomas Jefferson National Accelerator Facility Page 30 Provide electron beam polarimetry using the Compton Polarimeter at beam energies up to 11 GeV at presently achieved levels of accuracy (3%) Provide electron beam polarimetry using the Møller Polarimeter at beam energies up to 11 GeV at presently achieved levels of accuracy (3%) Measure the absolute energy of the electron beam at energies up to 11 GeV at about 5x10 -4 accuracy SRD Requirements

Thomas Jefferson National Accelerator Facility Page 31 What we’ve realized B = GeV No saturation in the pole Some nonlinearity in B VS. I due to return yoke saturation. Measured field quality at 0.9 T meets specs Mapper as built “runs like a charm”. Revised/simplified plan (CR ) Leave the magnets and mapper alone Just upgrade the arc dipole magnets power supply Cross calibrate 8 arc dipoles and the 9 th using the unmodified mapper* $137k reduction in cost Low risk gets even lower * WBS BEAMLINE - ARC Energy Measurement

Thomas Jefferson National Accelerator Facility Page 32 Arc Energy Calibrations Schedule and Manpower Calibration effort involves multiple moves of the 8 arc dipoles interchanging with the 9 th magnet. Time/Manpower Estimate: –Assume one week/magnet with a repeat+ 1 extra reproducibility check+ 1 week to realign the arc at the end ( =12). Hope to go faster than one/week. –Elect tech 2.2 MW 1 day/week for 11 weeks (Magnet connections) –Mech Tech 15.2 MW 2 tech's half time for 11 weeks moving magnets Surveyor 1 day/week for 11 weeks (aligning magnet on mapper) 2 surveyors 1 week realigning the arc –Scientist 12.0 MW JLab Scientist supervising –Visiting Users 12.0 MW University Collaborator –Paid Univ. Students 15.0 MW Work begins Q1 FY 11 (6 mo “down before the down”)