1

Drell-Yan Spectrometer for E-906

25m

Solid Iron Focusing

Magnet, Hadron

absorber and beam

dump

4.9m

Mom. Meas.

(KTeV Magnet)

Had

ron

Abso

rber

Station 1:

Hodoscope array

MWPC tracking

Station 2 and 3:

Hodoscope array

Drift Chamber tracking

Station 4:

Hodoscope array

Prop tube tracking

Liquid H2, liquid d2, empty, C, Ca, W

APS DNP, November 2010, Santa Fe

See poster by ACU students:• Brandon Bowen• Brianna Edlund• Tyler Hague

Mass (thrown)

Pt (thrown)

Mass (w/o sigwt) Mass (w sigwt)

Pt (w/o sigwt) Pt (w sigwt)

sigwt

sigwt

Mass V.S. Pt (bend plane)Mass Mass

Pt(Positive muon) Pt(Negative muon)

Pt V.S. Mass (bend plane)

Mass

Pt(Positive muon)

Mass

Pt(Negative muon)

Mass V.S. Pt (prof) (bend plane)Mass Mass

Pt(Positive muon) Pt(Negative muon)

Pt V.S. Mass(prof) (bend plane)

Mass

Pt(Positive muon)

Mass

Pt(Negative muon)

Compare with road index(bend plane)

Pt Pt

Road index Road index

Road combination of yp is 666 Road combination of yn is 679

Mass V.S. abs(Pt) (non-bend plane)Mass Mass

Pt(Positive muon) Pt(Negative muon)

abs(Pt) V.S. Mass (non-bend plane)

Mass

Pt(Positive muon)

Mass

Pt(Negative muon)

Mass V.S. abs(Pt) (prof) (non-bend plane)

Mass Mass

Pt(Positive muon) Pt(Negative muon)

abs(Pt) V.S. Mass (prof) (non-bend plane)

Mass Mass

Pt(Positive muon) Pt(Negative muon)

Compare with road index(non-bend plane)

Pt Pt

Road index Road indexRoad combination of xp is 393 Road combination of xp is 396

Compare with road index(non-bend plane)(abs(Pt))

Pt Pt

Road index Road index