Latifa Elouadrhiri

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Hall-B 12GeV Upgrade - Update

• Latifa Elouadrhiri
• Jefferson Lab
• CLAS12 Status
• PED and RD
• Software Online and Off-line
• Path to CD2
• CLAS Collaboration Meeting March 1 March 3,
  2007

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Project Engineering Design(PED)

• Significant Progress has been made in RD and
  ACD during FY05/FY06 PED started in October 2007,
  Technical Design Group has been building up at
  Jefferson Lab and within the collaboration.
• The Team
• The Collaboration
• JLab Engineers, Designers
• D. Kashy, K. Wilson
• M. Zarecky, P. Hemler, C. Wiggins, R. Getz, J.
  Robertson
• Hall B engineering technical staff
• Christo, Jacobs, Tilles, Carstens, Bruhwel, Gram,
  Insley, Mealer
• JLab Electronics Group C. Cuevas, W. Gunning, M.
  Taylor
• JLab Target Group M. Seely, C.Keith
• Hall B Instrumentation staff
• ITEP/EFROMOV, Oxford Inst., Saclay (Magnet
  Design)
• MSU (SVT RD)

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PED - Goals

• Goals
• Build CLAS12 to meet performance Specs
• Keep useful detectors and structures
• Design all items to be robust
• Where deemed necessary reasonably easy to service
• Design Tools
• IDEAS 3D CAD Primary design and modeling tool
  of JLAB
• Various other CAD and FEA tools

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JLAB Focus Points Thus Far

• Develop general Model of CLAS12
• Study space available and clearances
• Look at construction/assembly and maintenance
  issues
• Provide information for simulations
• Focus on critical components
• R1 Drift Chamber
• HTCC
• PCAL
• Support Magnet development
• FWD Carriage load capability
• Implementation of safety in the design

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Meetings and Documentation

• Mailing list clas12tdg_at_jlab.org
• Direct mail to Dave kashy_at_jlab.org
• Regular meetings Tuesday and Thursdays in ARC 528
  
• 1030 Tuesday
• 930 Thursday
• Meeting Minutes at Hall B Wiki
• http//clasweb.jlab.org/wiki/index.php/Main_Page

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CLAS12 in Hall B
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CLAS12 in Hall B
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CLAS12
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CLAS12 Central Detector
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CLAS12 Central Detectors
CTOF 50 scintillators with left-right readout
in high magnetic field. SVT - w/ 6-8 layers and
60,000 Si strips, stereo readout. Polarized
target tenfold increased beam power
CTOF Light guides
CTOF Scintillators
SVT Barrel
Polarized Target
Issues CTOF - Timing resolution? Operation in
magnetic field? SVT - Number of layers, momentum
resolution? Other tracking detectors? Target -
Space, field uniformity?
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Micromegas Bulk for CLAS12 tracker

• 06 13 Nuclear physics CLAS12 tracker
• The phase A has been approved by DAPNIA
• Goal 07-08 feasibility of thin bulk, option Si
  MM
• 8 man.year on 2 years (plus physists ) / 60 k
  (ANR?)
• Detector RD
• Integrated sealed drift, thin mesh, resist layer)
• Prototypes
• 2007 prototype B tests under 1.5 T (vs
  simulation).
• 2008 demonstrator FVT very thin flat
  micromegas.
• 2008 demonstrator 2K F 200 mm cylinder XY, 2k
  channels.
• Design study
• integration _at_ CEBAF (Mechanical, electronics,
  thermal,).
• External fabrication
• Prototype realization in PCB industry

Saclay Group
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CLAS12 High Threshold Cerenkov Counter

• HTCC located before
• TORUS magnet.
• Radiator gas CO2
• pp 5GeV/c

Issues - Mirror thickness - Light collection -
Magnetic field from solenoid torus
Optics Monte Carlo simulations are extremely
urgent. The optics should be able to accommodate
the full range of anticipated experimental
conditions, e.g. target position and length.
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HTCC Prototype Design Completed
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CLAS12 Forward Drift Chambers
DC review March 6-7, 2007
Drift chamber system 36 layer in 6 super layers
R3
R2

• Issues
• - Luminosity 1035cm-2s-1
• - Angle range 5o-40o
• - R2 interface with Torus
• - Position resolution
• Optimized Moller shield
• Stereo angles

R1
IC
Torus Coils
Moller Shield
www.jlab.org/Hall-B/secure/clas12/reviews/DC07
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CLAS12 Forward Carriage
Forward Carriage
FTOF
LTCC
EC
PCAL
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CLAS12 Forward TOF

• Charged particle
• identification p/K/p,
• separation up to 3/5GeV
• 5cm strip width thickness
• Level 1 Trigger, pre-trigger

FTOF
TORUS Cryostat
Forward Time-of-Flight System Add 2nd layer -
420 scintillators, 5cm wide - dT 60 - 80 psec
Issues Timing resolution Magnetic shield Use in
Trigger
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CLAS12 Preshower Calorimeter (PCAL)
Separation of high energy photons and p0 events
up to 10GeV/c.
Scintillator Strips
Issues Uniformity in response Time
resolution Readout Matching with EC
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Longitudinally Polarized target
Design already evolved past the conceptual design
phase Dimensions can be adjusted to outer
constraints (necessary to define keepout -
stayin zones soon)
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Present Design of Refrigerator
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Beam line Components
Need design work
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Electronics for the upgrade

• Flash ADC development
• Continuous Readout at 250 MHz 4ns per sample,
  into pipeline (no delay cables).
• Sophisticated 14 layer boards handle 16 channels
  of 10 bit FADCs (12 bit available).
• Put with Energy sum boards in a VXS crate (VME
  upgrade).
• Milestones
• October 2006 -- Design Complete Schematic
  reviewed
• November 06 - February 2007 Final
  layout/Routing/Review/Order
• March 2007 June 2007 INTENSE TESTING! This will
  include software development work for Coda
  Drivers and Test Station.
• Summer 2007 Production modules,, How many
  would you like to order?

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DAQ Trigger Need

• Complete FADC studies
• Analyze Flash ADC data and make recommendations
  on data format,data processing procedures, Flash
  ADC outputs to Trigger System, Flash ADC
  parameters (frequency, resolution) etc. Learn how
  to use Flash ADCs data learn how to produce
  information for trigger system.
• Trigger System
• List of algorithms Understand needs of future
  experiments.
• Efficiency studies must be completed for those
  algorithms.
• Algorithms must be suitable for electronic
  implementation.
• Trigger SimulationCurrently not covered and
  needs immediate manpower.

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CLAS12 Offline Software

• Short term effort to aid detector RD and design
• GSIM12/Recsis12 tools to simulate CLAS12
  performance
• Simplified event reconstruction software and
  Fast-MC
• Longer term
• geant4 based detector simulations
• state-of-the art reconstruction software

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CLAS12 DC Simulation and Event Reconstruction

• Complete Geant Simulation
• CLAS12 DC geometry
• magnetic fields
• Møller shield
• Upgrade to the event
• reconstruction code

DC R3
Beam Line Shielding
DC R2

• Luminosity Studies
• Tracking efficiency
• DC occupancy
• Resolutions
• P, T, F

Solenoid
Torus
DC R1
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Solenoid-Torus Magnetic Field
CLAS12
Field in TORUS sector mid-plane
T 5o
15o
10o
B(Gauss)
B(Gauss)
Solenoid
Torus
40o
20o
30o
B(Gauss)
B(Gauss)
B(Gauss)
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CLAS12 Single Event Display
5o angle
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CLAS12 Tracking Efficiency
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CLAS12 Tracking Efficiency
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CLAS12 Momentum Resolution
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Geant4 Accomplishments

• Geometry HDDS
• An XML validating parser, outside simulation
• Common with Hall D
• Simulation GEANT4
• HDDS input routines
• Hit generation scheme
• XML driven
• Multiple detectors can use same hit class

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Geant 4 Accomplishments (cont.)

• GEANT4 -gt EVIO API
• Start on geometry
• Start on magnetic field
• JANA reconstruction framework
• Doxygen system
• Subversion repository
• Overall software framework design

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Geant 4 Task List (now)

• Directory structure
• Repository structure
• Make system
• traditional
• Autoconf
• GEANT4 development
• detailed geometry
• hit scheme

• Input/Output classes
• EVIO
• ROOT
• Reconstruction
• JANA structure
• all detectors
• Tracking, tracking, tracking

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Geant 4 Communication
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12 GeV UPGRADE SCHEDULENovember 2006
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12 GeV Funding Profile
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DOE Critical Decision Schedule
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Path to CD2 (June 2007)

• Significant Progress has been made in RD and ACD
  during FY05/FY06. PED started in October
• 2007, Technical Design Group has been building up
  at Jefferson Lab and within the collaboration.
• CD2 Review Preparation (June 2007)
• Technical Design Report for each detector
  component of the CLAS12 Detector (by April 2,
  2007)
• Design requirement
• RD results
• Simulation and reconstruction
• Engineering design and analysis
• Updated cost estimate end of March (Bottoms Up
  Cost)
• Backup documentation for cost estimates
• Contingency analysis
• Risk evaluation and Risk mitigation
• Resource loaded schedule for construction (guided
  by funding profile)
• gt35 Engineering design and analysis
• All detector components
• Magnets Torus and Solenoid
• Trigger and data analysis
• Beam line

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CLAS12 Workshop Feb 2-3, 2007

• Goals
• Review and critique the preliminary designs of
  the detectors and other equipment for the 12 GeV
  upgrade of Hall B.
• Get organized and prepare documentation for the
  upcoming detector reviews in March/April 2007.
• Get organized and prepare documentation for the
  DOE project scope and schedule review (CD-2) in
  June 2007. This requires designs of all
  components at the 35 completion level.
• Identify specific participation and contributions
  by collaborating institutions in the design and
  construction of equipment projects, as well as in
  online/offline simulation/reconstruction software
  projects.

http//conferences.jlab.org/12GeV
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DOE TPC Funding Profile Lehman-05, July 2005
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Preshower-Status

• Pre-shower RD and PED are in progress
• Main design parameters were established using the
  full GEANT simulations
• Advances in the reconstruction allowed to use
  wider readout segmentation
• New design covers 4 times bigger area with the
  same number of readout channels and has more
  layers
• Final combination of scintillator-fiber-PMT is
  selected based on the light yield measurements
  and available price quotes
• FNAL is working on the production of scintillator
  strips with exact geometry
• More measurements will be done using the new
  scintillators as a part of the RD
• Next step build the prototype