Fermilab E906/Drell-Yan:Kick-off

Don GeesamanArgonne National Laboratory

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

Fermilab E906/Drell-Yan CollaborationAbilene Christian University

Donald Isenhower, Mike Sadler, Rusty Towell

Academia SinicaWen-Chen Chang, Yen-Chu Chen, Da-Shung Su

Argonne National LaboratoryJohn Arrington, Don Geesaman*, Kawtar Hafidi, Roy

Holt, Harold Jackson, David Potterveld, Paul E. Reimer*, Patricia Solvignon

University of ColoradoEd Kinney

Fermi National Accelerator LaboratoryChuck Brown

University of IllinoisNaomi C.R Makins, Jen-Chieh Peng

KEKShin'ya Sawada

Kyoto UniversityKenIchi Imai, Tomo Nagae

Ling-Tung UniversityTing-Hua Chang

*Co-Spokespersons

Los Alamos National LaboratoryGerry Garvey, Mike Leitch, Pat McGaughey, Joel

Moss

University of MarylandBetsy Beise

University of MichiganWolfgang Lorenzon

RIKENYuji Goto, Atsushi Taketani, Yoshinori Fukao,

Manabu Togawa

Rutgers UniversityRon Gilman, Charles Glashausser, Xiaodong Jaing,

Elena Kuchina, Ron Ransome, Elaine Schulte

Texas A & M UniversityCarl Gagliardi, Robert Tribble

Thomas Jefferson National Accelerator FacilityDave Gaskell

Tokyo Institute of TechnologyToshi-Aki Shibata, Yoshiyuki Miyachi

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?

¾pd2¾pp ¼

12·1+

¹d(x)¹u(x)

¸

– 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!!

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 M&S [plus

$1.5] manpower. Requests collaboration obtain additional funding to cover the M&S cost.

• 2008: Additional institutes join collaboration, taking responsibility for some of Fermilab’s 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.

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

SM3 CoilSM12 Iron

Concrete absorber& support

• 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

Kinematics, Energy loss and multiple scattering• What we want is x2>0.4 and positive xf

Remember at xf=0, x2 = (m/s1/2), so M ~ 6-7 GeV

In 189 inches of FeThese muons multiple scatter by0.272/Pmu ~9 mrYtarget 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 GeVYtarget resolution of 1.5 cm

This defines resolution and scattering angle acceptanceBut both multiple scattering and energy loss have large non-gaussian tails.

costhcm Pmu1xGeV

Pmu1zGeV

Pmu2xGeV

Pmu2zGeV

0. 3.50 31.06 -3.50 31.060.2 3.43 37.31 -3.43 24.810.4 3.21 43.56 -3.21 18.570.6 2.80 49.8 -2.80 12.320.8 2.10 56.06 -2.10 6.07

Energy loss fluctuations

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

Note additional events at large-x2.

Mas

s Res

olutio

n

(GeV

)

x 2 R

esolu

tion

x 2 R

esolu

tion

for x

2 >

0.3

5

Collaboration and FundingAdditional collaborating institutions (since 2006 proposal):

– KEK, Kyoto, RIKEN, Tokyo Tech—Station 3 Tracking; substantial funding of “common” equipment (e.g. beam line and magnets)

– Academia Sinica, Ling-Tung Univ.—modern readout electronics via FPGA.– Maryland, Michigan—cryogenic targetsThese groups have agreed to take on key tasks for the E906/Drell-Yan experiment

and demonstrate continued interest in this experimentFunding

– 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 Fermilab’s M&S

costs for E906.In order to proceed, an MOU detailing Fermilab’s and

collaboration’s responsibilities is needed.– Fermilab task force is currently reviewing costs in preparation for this MOU

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

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?

AgendaFriday 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

• 1600 Collaboration Picnic (Brown’s)

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.