SBS Budget A Staged Approach

John J. LeRose

Hall A Collaboration Meeting

December 10, 2010

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Start with the nuts and boltsIf you really want to see the whole budget see:

http://www.jlab.org/~lerose/sbs/2nd_go_around/final/Budget_StageA_StageB-Final.xlsx

• The Super Bigbite Project is designed to provide precision measurements of the nucleon form factors GEn, GMn and GEp to unprecedented values of Q2, and to enable a greatly expanded program of DIS experiments.

• The first stage, for $1.8M, will be comprised of: - Fully approved: GEn (50 days) and GMn (25 days).

• The second stage is for $2.3M. The second stage will open the door to a large group of Super Bigbite experiments including:

- Fully approved: GEp to 15 GeV2 (45days), - Conditionally approved: SIDIS: Transversity for 3He(e,e’π/K),

high-x u/d ratio using T & 3He- In planning stages: A1n (high Q2), DIS(e,e’ϕ), Transversity in

(e,e’πo), PVDIS w 70 msr,, and GEn and Fπ using a neutron polarimeter.

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A Staged approach to the Super Bigbite Project

The layout of the Super Bigbite apparatus with all components for GEp(5)

Scattering

chamber

Vacuum

snout

Magnetic shield

First tracke

r

Second tracker Hadron calorimete

r

Beam line Pb shield

48D48 magnet

Third tracker

CH2 analyzerBeam

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Stage I ofThe Super Bigbite

programfollowing the 12 GeV upgrade

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Hall A GEn (E12-09-016) will provide dramatic new insight into nucleon structure

• The dramatic turnover of the Argonne DSE model would be clearly visible.

• If the turnover is seen, it would provide strong evidence for the importance of diquark degrees of freedom in the nucleon form factors.6

Hall A GMn (E12-09-19) will provide superb accuracy

• WILL GREATLY IMPROVE THE ACCURACY WITH WHICH GMn KNOWN, AND IS ESSENTIAL FOR EXTRACTING GEn, F1, F2 AND DOING FLAVOR DECOMPOSITIONS.

• COMPARED TO HALL B, WILL ACHIEVE SUPERIOR ACCURACY IN HALF THE TIME, WITH INDEPENDENT SYSTEMATIC ERRORS.

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48D48 magn

et

Hadron calorimeter

GEM-based “First

trackers”

Single-axis GEM tracker

•Magnetic: - beam-line cut, power, support

platform - but without new coils, lead

shielding •Hadron calorimeter•GEM-based veto in front of

hadron calorimeter.• INFN funded GEM-based

“First tracker” from SBS

BigBite

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The layout of the Super Bigbite apparatus necessary for the Neutron FFs

48D48 magn

et

Hadron calorimet

er

GEM-based “First

trackers”

Single-axis GEM tracker

TOSCA calculation was performed

and showed that single coil solution is quite adequate for both GEn and

GMn

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The layout of the Super Bigbite apparatus necessary for the Neutron FFs

Stage I Budget for Super Bigbite

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Item Institution

2011 2012 2013 Total

Magnet, DC power, Beam line and university contracts overhead

JLab $298 k $243 k $416 k $957 k

Hadron Calorimeter CMU $110 k $193 k -- $303 k

Coordinate detector UVa $255 k $282 k -- $537 k

Total $663 k $718 k $416 k $1,797 k

Item Source AmountSBS Front GEM Tracker INFN $1,050 k (720 k Euro)

Clean room and DAQ electronics UVa match $50 K

Readout Chips UVa on hand $ 10 k

Total non-DOE contributions $1,110 k

Non-DOE contributions

DOE contributions

Jlab Contribution $1,797 k

Non-DOE contributions $1,110 k

Total Stage I Budget $2,907 k

Stage I DOE funds spent at JLab

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Item 2011 2012 2013 TotalMagnet $223 k $58 k $252 k $533 k

DC Power 0 $35 k $164 k $199 k

Beam Line $35 k $35 k 0 $70 k

Detector Supports 0 $75 k 0 $75 k

university contracts overhead $40 k $40 k 0 $80 k

Total $298 k $243 k $416 k $957 k

Stage II ofThe Super Bigbite program

following the 12 GeV upgrade

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• The second stage comprising a measurement of GEp and more can be completed for an additional $2.3M. The second stage will open the door to a large group of Super Bigbite experiments including:

- Fully approved: GEp to 15 GeV2 (45 days)- Conditionally approved: SIDIS: Transversity for 3He(e,e’π/K),

high-x u/d ratio using T & 3He- In planning stages: A1n (high Q2), DIS(e,e’ϕ), Transversity in

(e,e’πo), PVDIS w 70 msr,, and GEn and Fπ using a neutron polarimeter.

• The proton form factor, according to the most recent NSAC LRP, “... remains the only source of information about quark distributions at small transverse distance scales."

• Super Bigbite is the only way to obtain good accuracy at the necessary Q2

scaling with

existing equipmen

t and roughly half the

time

The 12 GeV GEp/GMp Experiment

• Super Bigbite, together with Bigbite, is the only way to push A1n to x=0.8.

• Super Bigbite is currently conditionally approved as the basis for the tritium expt.

Key Goals of the 12 GeV Program

E99-117

6.6 GeV

8.8 GeV

11 GeV

The 12 GeV A1n Experiment

stage II budget for super bigbite

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Project Project Executio

n

2013 2014 2015 Total

New coils for magnet, Beam line, detector supports, and university contracts overhead

JLab $40 k $649 k $136 k $825 k

Polarimeter GEM chambers UVa $313 k $369 k $190 k $872 k

GEM Readout NSU $246 k $165 k 0 $411 k

GEM mechanics W&M 0 $72 k 0 $72 K

Trigger Rutgers 0 $19 k $146 k $165 k

Total JLab contribution $599 k $1,274 k $472 k $2,345 k

Time line of DOE expenditures

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Stage I + Stage II Total cost to DOE : $ 4,142 k Total non-DOE contributions: $ 1,110 k + Labor

2,011 2,012 2,013 2,014 2,015 2,016$0 k

$500 k

$1,000 k

$1,500 k SBS Total Expenditures by YearFY11 Dollars

Stage IStage II

Status of the Budget• The presented budget is how we would like things to

work out

• The plan has been presented to and been warmly received by Lab Management

• Lab Management has promised to present the case to DOE

• At this point the actual budget is all conjecture!