Fermilab E906/Drell-Yan: Kick-off

1
Fermilab E906/Drell-YanKick-off

• Don Geesaman
• Argonne National Laboratory

2
E906

• It has been a long time since we have been
  together.
• Lots of new faces
• FNAL is now willing to move
• Lots of details that must be settled
• This meeting is to get everyone in gear and
  moving together

3
Fermilab E906/Drell-Yan Collaboration
Abilene Christian University Donald Isenhower,
Mike Sadler, Rusty Towell Academia
Sinica Wen-Chen Chang, Yen-Chu Chen, Da-Shung
Su Argonne National Laboratory John Arrington,
Don Geesaman, Kawtar Hafidi, Roy Holt, Harold
Jackson, David Potterveld, Paul E. Reimer,
Patricia Solvignon University of Colorado Ed
Kinney Fermi National Accelerator
Laboratory Chuck Brown University of
Illinois Naomi C.R Makins, Jen-Chieh
Peng KEK Shin'ya Sawada Kyoto
University KenIchi Imai, Tomo Nagae Ling-Tung
University Ting-Hua Chang Co-Spokespersons
Los Alamos National Laboratory Gerry Garvey,
Mike Leitch, Pat McGaughey, Joel Moss University
of Maryland Betsy Beise University of
Michigan Wolfgang Lorenzon RIKEN Yuji Goto,
Atsushi Taketani, Yoshinori Fukao, Manabu
Togawa Rutgers University Ron Gilman, Charles
Glashausser, Xiaodong Jaing, Elena Kuchina, Ron
Ransome, Elaine Schulte Texas A M
University Carl Gagliardi, Robert Tribble Thomas
Jefferson National Accelerator Facility Dave
Gaskell Tokyo Institute of Technology Toshi-Aki
Shibata, Yoshiyuki Miyachi
4
Measurements and origins of the sea quarks
d-bar/u-bar

• Drell-Yan allows for selective study sea quarks.
• In a fixed target experiment, kinematics,
  acceptance and parton distributions combine to
  select interactions dominated by annihilations of
  antiquarks in the target.
• What is the structure of the nucleon?
• What is d-bar/u-bar? First large-x measurement
  of sea quarks.
• What are the origins of the sea quarks?

• What is the high-x structure of the proton?
  Drell-Yan measures beam valence parton
  distributions at very high-x with no nuclear
  corrections!
• CTEQ and MRST want these data!!

5
E906/Drell-Yan Timeline

• 2001 Approved by Fermilab PAC scheduling
  deferred until other fixed target experiments
  could also be ready to run.
• 2005-06 Scheme to run E906/Drell-Yan with
  minimal impact on Neutrino production developed.
  No need for major fixed target run.
• 2006 Fermilab PAC re-endorses wisdom of 2001
  PAC.
• 2007 DOE/Nuclear Physics begins funding
  spectrometer upgrade
• 2007 Fermilab estimates cost (to Fermilab) to
  stage E906 at 1.5M in MS plus 1.5 manpower.
  Requests collaboration obtain additional funding
  to cover the MS cost.
• 2008 Additional institutes join collaboration,
  taking responsibility for some of Fermilabs
  tasks, and promise to provide additional money to
  Fermilab for E906/Drell-Yan infrastructure.
• 2008 Spectrometer redesign promises reduces
  cost, savings in DOE/Nuclear Physics money may be
  transferred to Fermilab.
• We believe we have identified sufficient
  resources to run E906.
• However, with 2008 and 2009 continuing
  resolutions it still needs to be nailed down with
  MOU.

6
Spectrometer Redesign Solid Iron Magnet

• Replace 1st open aperture magnet with solid iron
  magnet
• Motivation Cost--coils for open aperture magnet
  would have cost 1.5M

• Solid iron magnet can be assembled from
• Existing magnet coils from SM3
• Existing Iron blocks from SM12
• New tracking chamber at Sta. 3 for better
  acceptance
• KEK, Kyoto, RIKEN, Tokyo Tech
• New readout electronics
• Academia Sinica, Ling-Tung Univ.
• Add target expertise (UM2)
• Add gas system

SM12 Iron
SM3 Coil
Concrete absorber support
7
Kinematics, Energy loss and multiple scattering

• What we want is x2gt0.4 and positive xf
• Remember at xf0, x2 (m/s1/2), so M 6-7 GeV
• In 189 inches of Fe
• These muons multiple scatter by
• 0.272/Pmu 9 mr
• Ytarget resolution of 2 cm
• In 189 of saturated Fe
• 3.3 GeV Pt kick
• 30 Gev muons bend by 110 mr.
• They lose 7.3 GeV with a sigma of 0.8 GeV
• Ytarget resolution of 1.5 cm
• This defines resolution and scattering angle
  acceptance

costhcm Pmu1x GeV Pmu1z GeV Pmu2x GeV Pmu2z GeV
0. 3.50 31.06 -3.50 31.06
0.2 3.43 37.31 -3.43 24.81
0.4 3.21 43.56 -3.21 18.57
0.6 2.80 49.8 -2.80 12.32
0.8 2.10 56.06 -2.10 6.07
8
Energy loss fluctuations
9
Monte Carlo of New Design

• Effect on Experiment (Monte Carlo)
• Acceptance increased at large-x2
• Larger fiducial volume of magnet
• Decreased acceptance at low-x2
• Resolution degraded by additional energy loss and
  multiple scattering
• Experimental goals still achievable

Expected statistical uncertainty
x2 Resolution for x2 gt 0.35
x2 Resolution
Mass Resolution (GeV)
Note additional events at large-x2.
10
Collaboration and Funding

• Additional collaborating institutions (since 2006
  proposal)
• KEK, Kyoto, RIKEN, Tokyo TechStation 3 Tracking
  substantial funding of common equipment (e.g.
  beam line and magnets)
• Academia Sinica, Ling-Tung Univ.modern readout
  electronics via FPGA.
• Maryland, Michigancryogenic targets
• These groups have agreed to take on key tasks for
  the E906/Drell-Yan experiment and demonstrate
  continued interest in this experiment
• Funding
• DOE/Nuclear Physics has agreed to fund the
  spectrometer upgrade
• Initial funds received in FY07.
• With new design, funds can now be reprogrammed
  to Fermilab for infrastructure (e.g. beam line,
  etc.) needed for experiment.
• Japanese collaborators have indicated they expect
  to contribute significantly toward Fermilab
  infrastructure as well.
• We believe that we have found sufficient
  resources to cover Fermilabs MS costs for E906.
• In order to proceed, an MOU detailing Fermilabs
  and collaborations responsibilities is needed.
• Fermilab task force is currently reviewing costs
  in preparation for this MOU

11
Funding Model

• DOE NP
• FNAL Common items 400k FY07, 200K FY08, 200k
  FY09
• Stations 1 WC (Colorado)
• Hodoscopes (ACU)
• LANL LDRD
• Station 4 prop tubes
• NSF
• Gas system
• Trigger
• RIKEN
• 500k
• Station 3 chambers

12
Goals for this meeting

• Confirm this concepts works
• Confirm funding model
• Path to finalize geometry
• Establish standards
• Procedures and Units
• Software
• ?
• Agree on Schedule
• Make sure we know all issues for MOU
• What else do we need to do?

13
Agenda

• Friday 20 June WH
• 900 Welcome and Introductions and Overview
  Geesaman
• 920 The current Design Reimer
• 1030 Review of what we need to do
  Geesaman
• 1045 Break
• 1100 Memorandum of Understanding-- Reimer
• 1130 Schedule Reimer
• 1200 Lunch
• 1300 KTEV Hall Visit
• 1400 Beam Brown
• 1420 Targets Beise
• 1440 Station 1 WC Kinney (via
  proxy)
• 1500 Station 1 and 2 Hodoscopes Makins
• 1520 Station 2 WC Gilman
• 1530 Trigger Gilman
• 1545 Break
• 1600 Parton energy loss Vitev
• 1620 Other Physics ideas Peng
• 1700 J-PARC Sawada

• Saturday, 21 June
• 900 Stations 3 WC Goto
• 920 Stations 3 and 4 Hodoscopes Isenhower
• 940 Chamber 4 Prop Tube Garvey
• 1000 Magnets Reimer
• 1020 Code and Document Management
  Reimer
• 1040 DAQ and Readout Ting
• 1110 Fast Monte Carlo Reimer
• 1125 GEANT Monte Carlo Isenhower
• 1200 Reconstruction
  Makins/Leitch
• 1230 Summary Geesaman
• Afternoon available for smaller working groups if
  needed.