PHENIX Run8 Summary

• d+Au was fantastic! - x30 over Run3• baseline for future A+A• new level of precision on intrinsic Cold Nuclear Matter physics• now p+p is the weakest part of baseline

• p+p was disappointing• polarization was very poor• a strong p+p run with ample beam/polarization development is a must for the future

• PHENIX efficiency for recording useful luminosity up from 50% in past to 68% now (33% in ±30 cm)

• DAQ developments continue to push to higher event rates• but tighter z-vertex requirements in the future will lower fraction of luminosity that is useful

THANKYOU to CA for a great (d+Au) Run!!

5/29/2008 1PHENIX - MJL

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80 nb-1 Run8 dAu:• 30x Run3• 140% of Run8 goal• 160 Billion Evts

dAu• peaks above 3 nb-1 per day• one day > total Run3 luminosity of 2.7 nb-1

Run Energy Long. Trans.

02 200 GeV 0.15 pb-1

03 200 GeV 0.35 pb-1

04 200 GeV 0.12 pb-1

05 200 GeV 3.4 pb-1 0.16 pb-1

06 200 GeV 7.5 pb-1 2.7 pb-1

06 62.4 GeV 0.08 pb-1 0.02 pb-1

08 200 GeV 5.2 pb-1

5.2 pb-1 200 GeV p+p Transverse Vertical luminosity recorded(1.1 pb-1 FOM)Peak luminosity per day ~0.37 pb-1

pp - almost no progress on luminosity & polarization development towards future

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73,000 J/

For all data

63 nb-1

6,000 J/ ee

from all data

59 nb-1

200 GeV d+Au

4.8 pb-1

13,000 J/ + - for all data

(22,000 in Run6)

200 GeV p+p

PHENIX J/’s from Run8

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200 GeV d+Au• Live Time – 89%• PHENIX up – 77%• Overall – 68%

200 GeV p+p• Live Time – 89%• PHENIX up – 69%• Overall – 62%(where 10% correction for loss due to CNI measurements is made)

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Efficiency for Run8 d+Au and p+p

Black vertical lines are markers for Maintenance and/or APEX days

About 50% of CA delivered luminosity is useful luminosity within our ±30 cm vertex range

Given that, PHENIX efficiencies in Run7 were: d+Au

p+p

North arm HV Repairs (bad channels in yellow):•Almost All of North Arm Now Good except for one station-2 section (N222-6) • [N182-6 is actually ok even though it shows disabled (yellow) here]• problems fixed by removing AC coupling capacitors for (descoped) anode readoutend of 2008 Run

Now

South Muon arm HV partially fixed – will finish in next shutdown

end of 2008 Run Now

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Muon W-Trigger FEE Upgrade – Final Prototype Test During Run8

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8

MuTRGADTX

MuTRGMRG

Level 1TriggerBoard

DataCollectingModule

MuTrFEEB

2 plane

5%

95%

Trigger

LV1 Trig accept

IR Counting House

Optical

1.2Gbps

Amp/Discri.Transmit

DataMerge

PHENIX Muon trigger

8

LV1 Trig accept

Local DAQ

9 1/29/2009

MuTrigger FEE Support

CNM Constraints from New Run8 d+Au J/ Data

expected accuracy

simulation

Expected improvement in CNM constraints (red) compared to Run3 (blue)

simulation

J/d+Au

J/

J/

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PHENIX & STAR Preliminary p+p Cross Sections

1st Upsilons at RHIC

PHENIX 2005

STAR2006

PHENIX Preliminaryp+p QM05

Upsilons from Run8 d+Au?(online spectrum)

+-

±±

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