Hall-C 12 GeV Project

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
Lehman-07 EIR-07 Lehman-08
CD-0 Mission Need 2QFY04 (A) 2QFY04 (A) 2QFY04 (A)
CD-1 Preliminary Baseline Range 2QFY06 (A) 2QFY06 (A) 2QFY06 (A)
CD-2 Performance Baseline 4QFY07 1QFY08 1QFY08 (A)
CD-3 Start of Construction 4QFY08 4QFY08 4QFY08
CD-4A Accelerator Project Completion and Start of Operations NA 1QFY15 1QFY15
CD-4B Experimental Equipment Project Completion and Start of Operations 3QFY15 3QFY15 3QFY15
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 gt90 complete w/98 of
  documentation required for FY09 procurements
• Physics gt90 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 RD
• PED Summary
• Construction
• Labor / Procurement / Schedule
• Previous Reviews and Recommendations
• Checkout / Testing / Commissioning
• Risk Management
• Summary

7
Motivation for Hall C Upgrade

• 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

8
Hall C SHMS Design Parameters 
Parameter SHMS Design
Range of Central Momentum 2 to 11 GeV/c for all angles
Momentum Acceptance ? -10 to 22
Momentum Resolution 0.03-0.08 (SRD lt0.2)
Scattering Angle Range 5.5 to 40 degrees
Solid Angle Acceptance gt4.5 msr for all angles (SRD gt4.0 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 GeV beam
Protection from Magnetic, Cryogenic, and Fall Hazards
Angle Changes Rapid, Remote, Reproducible

• 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
Experiment p (GeV) ?p/p () ?? (rad) ?f (rad)
Pion Form Factor 2.2-8.1 2x10-3 1.5x10-3 1.5x10-3
Transition Form Factors 1.0-8.5 1x10-3 1.0x10-3 1.0x10-3
Not yet submitted to PAC
?p/p ()
?? (radians)
?f (radians)
2x Specd Resolution MCS
Specd Resolution MCS
Specd Resolution
22
-10
12
SHMS PID Requirements negative polarity
Experiment p (GeV) Reqd e-p- Disc. Specd NG Cerenkov Specd Calorimeter Total Expected
E12-06-101 2.2 - 8.1 4.51031 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041
E12-06-104 5.4 - 5.8 1031 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041
E12-07-103 2.4 - 8.5 1031 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041
E12-06-105 (xgt1) 4.8 -10.6 51031 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041
E12-06-110 (c) 2.2 - 6.8 1031 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041
E12-06-121 6.3 - 7.5 gt1021 501 (HMS Cerenkov gives up to 3001 now) gt2001 (10001 above 6 GeV/c) gt1041

• PID requirements at negative polarity are
  dominated by the xgt1 experiment

13
SHMS PID Requirements positive polarity
Experiment p (GeV) Reqd p (K,p) Discrimination Specd HG Cerenkov
E12-06-101 (Fpi-3) 2.2 - 8.1 1041 See Chart
E12-06-107 (c) 5.1 - 9.6 1041 See Chart
E12-07-103 (pion factorization) 2.4 - 8.5 1031 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

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 (MOUs are in approval stage) Gift from
HERMES (testing is on-Project RD)

• 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/p (or p /K) separation at
high momenta
University of Virginia

• 2.5 m long gas radiator at atmospheric pressure
• Argon p 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 AT 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 p/K separation for momenta gt
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/p 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. RD Task under CR08-028
20 p.e. peak
Philips XP3461
HERMES PMT
Virgin PMT
Pb-Glass transmission measured lt10 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
SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand

  Channels WC Preamps WC TDCs Splitters Digital Delay Analog Sums PMT TDCs ADCs Disc Scaler HV Logic FB NIM VME
NG Cerenkov 4 0 0 4 4 4 4 4 4  
Drift Chambers 1404 1404 1404 0 0 0 0 0 8 1  
Sc Hodoscopes 100 0 0 100 100 0 100 100 100 100  
Qtz Hodoscope 20 0 0 20 20 0 20 20 20 20  
HG Cerenkov 4 0 0 4 4 4 4 4 4  
Preshower 32 0 0 32 32 33 0 32 32  
Calorimeter 224 0 0 224 224 240 0 224 224 3  
Control/Trig 40 32 30 1 1 1
SHMS Needs 1404 1404 384 384 281 128 384 160 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-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 RD (WBS 1.1.4)
YEAR RD Report Task Description
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 Pauls talk)
2008 TBD Completion of the Horizontal Bend Magnet trial wind and testing. (see Pauls talk)
2008 TBD (report drafted) Selection of optimal HERMES lead-glass blocks and PMTs for the SHMS Calorimeter (see Vardans talk)
All RD 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
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 Pauls talk)
JLab Design Review 2006 Recommendations
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 Pauls talk)
33
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 Pauls talk)
JLab Design Review 2006/8 Recommendations
Hall-C
Hall-B
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 specs 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)

SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand SHMS Electronics Channels Needed vs. Channels on-hand

  Channels WC Preamps WC TDCs Splitters Digital Delay Analog Sums PMT TDCs ADCs Disc Scaler HV Logic FB NIM VME
NG Cerenkov 4 0 0 4 4 4 4 4 4  
Drift Chambers 1404 1404 1404 0 0 0 0 0 8 1  
Sc Hodoscopes 100 0 0 100 100 0 100 100 100 100  
Qtz Hodoscope 20 0 0 20 20 0 20 20 20 20  
HG Cerenkov 4 0 0 4 4 4 4 4 4  
Preshower 32 0 0 32 32 33 0 32 32  
Calorimeter 224 0 0 224 224 240 0 224 224 3  
Control/Trig 40 32 30 1 1 1
SHMS Needs 1404 1404 384 384 281 128 384 160 32 392 30 2 4 1
Inventory   1472 1536 384 272 128 192 536 244 176 752 32 2 4 1
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 (Pauls 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
• RD Performed to lower technical risks (complete
  by Sept. 08)
• Calorimetry re-use HERMES blocks (after
  testing!)
• Magnets HB heating, cable tests, coil winding
  (Pauls 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 detectors 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

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