November 18, 2008 John Haggerty 1 PHENIX In Run 9 John Haggerty Brookhaven National Laboratory.

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November 18, 2008 John Haggerty 1 PHENIX In Run 9 John Haggerty Brookhaven National Laboratory

Transcript of November 18, 2008 John Haggerty 1 PHENIX In Run 9 John Haggerty Brookhaven National Laboratory.

Page 1: November 18, 2008 John Haggerty 1 PHENIX In Run 9 John Haggerty Brookhaven National Laboratory.

November 18, 2008 John Haggerty 1

PHENIX In Run 9

John Haggerty

Brookhaven National Laboratory

Page 2: November 18, 2008 John Haggerty 1 PHENIX In Run 9 John Haggerty Brookhaven National Laboratory.

November 18, 2008 John Haggerty 2

Run 9 assumptions

PAC recommendation:3. Longitudinally polarized proton-proton collisions at √s = 500

GeV for 5 weeks to allow beam development and commissioning by C-AD, a first measurement of W boson production in PHENIX, and background studies in STAR.

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Run 9 planning

Run 9 planning is fairly far along• Beam Use Proposal and PAC guidance• Planning document (TN-427) 200 GeV pp• October DC meeting parade of systems• December physics/trigger/daq/analysis DC meeting• Steve Pate agreed to serve as Spin Coordinator

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Physics goals at 500 GeV

• Measure backgrounds under high pT muons

• Test muon trigger electronics (currently being installed)

• Measure production cross sections 0, to pT ~ 30 GeV, J/,

• Measure ALL for 0,

• With 25 pb-1 record W’s in central arm– ~500 W+ and ~90 W-

– First look at AL and cross section

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Central arm W

Central arms W+e+ ~21 pbW-e- ~3 pb

• Modify EMCAL gain • Develop analysis• Cross section measurement• First look at AL

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Detector issues for 500 GeV running

• Magnetic field configuration– HBD needs “field free” bucked central field (“+-”)– But momentum resolution in central arms is compromised by

reduced field– EC agreement to switch field to “++” after first week of

physics running

• Gain changes in EMCAL (present dynamic range set to 20 GeV); mostly done with laser, should be close at beam startup

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Upgrade detectors in run 9

• Upgrade detectors in Run 9 are partial installations or engineering runs:– HBD– Muon Trigger (MUTR FEE upgrade)– Muon RPC prototype– Absorber in muon arm

• First goal of upgrade detectors: do no harm

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HBD

• HBD.W installed• HBD.E scheduled for installation December 16• Will need to gain operational experience with

DAQ, HV, monitoring, calibration, analysis• “+-” field configuration necessary for HBD

operation

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Muon trigger upgrade

Major installation effortunder way… will completeNorth arm MuTr FEE upgrade in this shutdown

3 components• MuTr electronics• RPC layers• Trigger logic

RPC3

RPC1

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RPC prototype

• Resistive Plate Chambers– Fast response– Good spatial resolution– Low cost, CMS experience

• Installing prototype sector and electronics

• Engineering run

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Muon trigger board

VMEInterface

P1

P0

P2

P3

12 x xcvr

Virtex-5LX110T

(RPC1,3 @ 2.8Gbit)

(MuTr St2 @ 2.8Gbit)

(MuTr St1 @ 2.8Gbit)

(MuTr St3 @ 2.8Gbit)

One board processes four trigger octants (one octant per tile)Testing of prototype late in the run

Virtex-5LX110T

(9 fibers per octant)

Virtex-5LX110T

Virtex-5LX110T

Virtex-5LX110T

12 x xcvr

12 x xcvr

12 x xcvr

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Many other detector repairs/improvements

Run 6 ERT turnon

8 kHz

• DAQ improvements to increase livetime, event rate

• EMCAL/RICH trigger efficiency improvements

• DC and PC repairs

• MUTR high voltage stability

• Could be some additional small tests/prototypes for upgrades

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Operational Efficiency

• Review of operational efficiency at S&T Review July 7-9, 2008

• Short summary (from Run 8 d+Au):– 50% in vertex cuts (no change

expected)– 77% uptime (modest improvements

possible, but less with development)– 89% livetime (slight improvement

possible with higher rates)

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Final days schedule

• Need to complete MuTrig installation, remove scaffolding; install HBD, RPC prototype

• Expecting closing up the shield wall beginning of January, 2009 then safety and detector checkout

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RHIC/PHENIX interaction

• Magnetic field change “+-” to “++” shortly after physics run begins

• Tunnel access for RPC3 prototype during startup• Optimizing the big three: luminosity, polarization,

background• Improve communication with MCR (discussion with

Lee Hammons)