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

Thomas Jefferson National Accelerator Facility

Hall-C

Hall-C 12 GeV ProjectOverview of SHMS detector system,

Requirements, and ScheduleHoward Fenker

for

Physics Opportunities in Hall C at 12 GeVAugust 5, 2008


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


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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


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CD-3 RequirementsDOE O413.3A:

1. Final Design

2. Update CD-2 Project Documentation

3. Independent Project (Lehman) Review

4. Hazard Analysis Report

5. Preliminary Security Vulnerability

Assessment Report

6. Construction Project Safety and Health

Plan7. Final Sustainable Environmental

Stewardship-High Performance Sustainable Building

8. 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


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12 GeV UPGRADE SCHEDULE


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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


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• 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


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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


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SHMS Overall Design

Dipole18.4 Degree

BendMax Field: 4.76 T

EFL: 2.85 m

Q2 Q3Max Gradient:

14.4 T/mEFL: 1.61 m

Q1Max Gradient:

10.63 T/mEFL: 1.86m

Bender3 Degree Bend

Max Field: 3.11 TEFL: 0.75 m


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Mini-Slides: Project Management


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SHMS Experiment Resolution Requirements

Experiment p (GeV)

Δp/p (%) Δθ (rad) Δφ (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

Δp/p (%) Δθ (radians)Δφ (radians)

Spec’d ResolutionSpec’d Resolution & MCS

2x Spec’d Resolution & MCS

-10% +22%


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SHMS PID Requirements : negative polarity

Experiment p (GeV)

Req’d e-:π- Disc.

Spec’d NG Cerenkov

Spec’d Calorimeter

Total Expected

E12-06-101 2.2 - 8.1 4.5•103:1

50:1

(HMS Cerenkov gives up to 300:1

now)

>200:1

(1000:1 above 6 GeV/c)

>104:1

E12-06-104 5.4 - 5.8 103:1

E12-07-103 2.4 - 8.5 103:1

E12-06-105 (x>1) 4.8 -10.6 5•103:1

E12-06-110 (c) 2.2 - 6.8 103:1

E12-06-121 6.3 - 7.5 >102:1

• PID requirements at negative polarity are dominated by the x>1 experiment


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SHMS PID Requirements: positive polarity

Experiment p (GeV)

Req’d π+ :(K,p) Discrimination

Spec’d HG Cerenkov

E12-06-101 (Fpi-3) 2.2 - 8.1 104:1 *

SeeChart

E12-06-107 (c) 5.1 - 9.6 104:1

E12-07-103 (pion factorization)

2.4 - 8.5 103:1

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

AerogelCerenkov(not in project but space reserved)

Experiment Needs

Dis

crim

inat

ion

Pow

er

Momentum (GeV/c)

TOF

* Fpi-3 spec’ s PID as “104 at 8GeV/c” using the HG Cerenkov.

*


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Shower Counter

S2 Hodoscope

C4F8O Cerenkov

S1 Hodoscope Drift Chambers

Ar/Ne Cerenkov

Space Reserved for Aerogel Cerenkov

Hall-C SHMS Detector SystemNoble Gas CerenkovDrift ChambersTrigger Hodoscopes

•3 Planes Scintillator Paddles•1 Plane Quartz

Heavy Gas CerenkovCalorimeterDetector Frames

(color coding)12 GeV Project FundedNSF MRI Funding (MOU’s are in approval stage)Gift from HERMES

(testing is on-Project R&D)


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The SHMS Detector SystemNoble Gas Cerenkov: e/π (or π /K) separation at high momenta

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 tankbecomes part of the vacuum system – reduces MCS

University of Virginia


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The SHMS Detector SystemNoble Gas Cerenkov

4 spherical mirrors, 45cm x 45 cm

Ray-trace simulation of optics.

Reference Design (HMS Cerenkov)


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BASEPLATE

GAS WINDOW

CATHODE FOIL

VÕPLANE

X PLANE

CATHODE FOIL

CATHODE FOIL

CATHODE FOIL

CATHODE FOIL

CATHODE FOIL

CATHODE FOIL

CATHODE FOIL

UÕPLANE

XÕPLANE

V PLANE

U PLANE

GAS WINDOW

BASEPLATE

AMPLIFIERMOUNTING PLATE

Z

XYBEAM

CATHODE WIREHV INPUT

FIELD WIREHV INPUT

The SHMS Detector SystemDrift 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 UniversityNSF MRI Funding


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


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The SHMS Detector SystemTrigger Hodoscopes: basic trigger; efficiency determination.

•3 Planes Scintillator Paddles + 1 Plane Quartz BarsS1X: 12 bars 8cm x 110 cm x 5mmS1Y: 14 bars 8cm x 90cm x 5mmS2X: 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 UniversityNSF MRI Funding

North Carolina A&TNSF MRI Funding


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The SHMS Detector SystemTrigger Hodoscopes

S1-XFront View

905 mm

900 mm

Mechanical Design is a re-scaling of existing HMS/SOS design

0.5cm paddle overlap – all paddles


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The SHMS Detector SystemHeavy Gas Cerenkov: π/K separation for momenta > 3.4 GeV

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

51.05

91.33

117 °

113 °

95 cm

155 cm110 cm

0.020" Ti Window

5" FlatPMT

Side Elevation Line Drawing

University of Regina

SLD ECRID Gas System


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The SHMS Detector SystemCalorimeter: e/π separation

Side Elevation

Front Elevation

Plan view

Yerevan Physics InstitutePreshower: Re-use SOSShower: 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


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The SHMS Detector SystemCalorimeter:

Pb-Glass and PMT performance of HERMES tubes is still very good.

R&D Task under CR08-028

Pb-Glass transmission measured –<10% degradation since 1994

1 p.e. peak

20 p.e. peak

HERMES PMT Virgin PMTPhilips XP3461


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SHMS Shield HouseShield House: low radiation flux for detectors & electronics

Graph shows results of Simulations normalized to measurements in HMS

1.2

0.8

0.4

0.00 10 20 30 40

Spectrometer Angle (deg)

SHMS detec tor hutSHMS elec tronics hutHMS

2.0

1.5

1.0

0.5

0.01.5 2.0 2.5 3.0 3.5 4.0Conc rete density (g/cm3)

Normalized to nominalconc rete dens ity (2.40 g/cm3)


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SHMS Electronics Channels Needed vs. Channels on-hand

ChannelsWC

Preamps WC TDCs SplittersDigital 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 1SHMS Needs 1404 1404 384 384 281 128 384 160 32 392 30 2 4 1Inventory: 1472 1536 384 272 128 192 536 244 176 752 32 2 4 1

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..

We Expect to find enough of these in our stock

SHMS Detector Electronics

Above inventory was prepared in response to Recommendation C-Det08-4: SHMS Detector Review (Jan 2008)


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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


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Hall C R&D (WBS 1.1.4)YEAR R&D 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 Paul’s talk)

2008 TBD Completion of the Horizontal Bend Magnet trial wind and testing.(see Paul’s talk)

2008 TBD(report drafted)

Selection of optimal HERMES lead-glass blocks and PMTs for the SHMS Calorimeter (see Vardan’s talk)

All R&D activities will be complete before September 30, 2008.


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Mini-Slides: Project Management


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Detectors Schedule


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CD-3 Requirement: Final Design Review


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JLab Design Review 2006 RecommendationsRecommendation 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.



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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.


JLab Design Review 2006/8 Recommendations

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)

Hall-C Hall-B


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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

JLab Design Review 2008 Recommendations

Summary of spec’s was shown in opening slides.


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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


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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

ChannelsWC

Preamps WC TDCs SplittersDigital 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


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Mini-Slides: Checkout Plans / Risk Mgt.


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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 !


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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


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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.


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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

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

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