Phenix Forward Upgrade: the RPCs
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Production and installation of the RPCs
![The proton structure:
where the proton spin comes from ?
quark
spins
gluon
spins
quark&gluon
orbital motion
Francesca Giordano
TABLE IV: Truncated first moments, ∆f
1,[0.001→1]
i , and full ones, ∆f1
i , of our polarized PDFs at various Q2
.
x-range in Eq. (35) Q2
[GeV2
] ∆u + ∆¯u ∆d + ∆ ¯d ∆¯u ∆ ¯d ∆¯s ∆g
0.001-1.0 1 0.809 -0.417 0.034 -0.089 -0.006 -0.118
4 0.798 -0.417 0.030 -0.090 -0.006 -0.035
10 0.793 -0.416 0.028 -0.089 -0.006 0.013
100 0.785 -0.412 0.026 -0.088 -0.005 0.117
0.0-1.0 1 0.817 -0.453 0.037 -0.112 -0.055 -0.118
4 0.814 -0.456 0.036 -0.114 -0.056 -0.096
10 0.813 -0.458 0.036 -0.115 -0.057 -0.084
100 0.812 -0.459 0.036 -0.116 -0.058 -0.058
0
0.1
0.2
0.3
0.4
-0.15
-0.1
-0.05
0
0.05
0
0.02
0
0.02
x(Δu + Δu
–
) x(Δd + Δd
–
)
xΔu
–
xΔd
–
A
π
ALL
0
Δχ2
=1 (Lagr. multiplier)
2
-0.004
-0.002
0
0.002
0.004
TABLE IV: Truncated first moments, ∆f
1,[0.001→1]
i , and full ones,
x-range in Eq. (35) Q2
[GeV2
] ∆u + ∆¯u ∆d + ∆ ¯d ∆
0.001-1.0 1 0.809 -0.417 0.
4 0.798 -0.417 0.
10 0.793 -0.416 0.
100 0.785 -0.412 0.
0.0-1.0 1 0.817 -0.453 0.
4 0.814 -0.456 0.
10 0.813 -0.458 0.
100 0.812 -0.459 0.
0
0.1
0.2
0.3
0.4
-0.15
-0.1
-0.05
0
0.05
-0.04
-0.02
0
0.02
-0.04
-0.02
0
0.02
-0.04
-0.02
0
0.02
10
-2
10
-1
x(Δu + Δu
–
) x(Δd + Δd
–
)
DSSV
xΔu
–
xΔd
–
xΔs
–
x
Δχ2
=1 (Lagr. multiplier)
Δχ2
=1 (Hessian)
xΔg
x
Q
2
= 10 GeV
2
-0.1
-0.05
0
0.05
0.1
10
-2
10
-1
-0.004
-0.002
0
0.002
0.004
FIG. 4: U
global fit
the Hessi
ing PHEN
consisten
Light sea
anti-qua
now than
of more p
valence quarks
sea quarks & gluons
2](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Phenix Forward Upgrade: the RPCs
- 1. The RPC Upgrade of the PHENIX Muon Trigger Francesca Giordano 1
- 2. The proton structure: where the proton spin comes from ? quark spins gluon spins quark&gluon orbital motion Francesca Giordano TABLE IV: Truncated first moments, ∆f 1,[0.001→1] i , and full ones, ∆f1 i , of our polarized PDFs at various Q2 . x-range in Eq. (35) Q2 [GeV2 ] ∆u + ∆¯u ∆d + ∆ ¯d ∆¯u ∆ ¯d ∆¯s ∆g 0.001-1.0 1 0.809 -0.417 0.034 -0.089 -0.006 -0.118 4 0.798 -0.417 0.030 -0.090 -0.006 -0.035 10 0.793 -0.416 0.028 -0.089 -0.006 0.013 100 0.785 -0.412 0.026 -0.088 -0.005 0.117 0.0-1.0 1 0.817 -0.453 0.037 -0.112 -0.055 -0.118 4 0.814 -0.456 0.036 -0.114 -0.056 -0.096 10 0.813 -0.458 0.036 -0.115 -0.057 -0.084 100 0.812 -0.459 0.036 -0.116 -0.058 -0.058 0 0.1 0.2 0.3 0.4 -0.15 -0.1 -0.05 0 0.05 0 0.02 0 0.02 x(Δu + Δu – ) x(Δd + Δd – ) xΔu – xΔd – A π ALL 0 Δχ2 =1 (Lagr. multiplier) 2 -0.004 -0.002 0 0.002 0.004 TABLE IV: Truncated first moments, ∆f 1,[0.001→1] i , and full ones, x-range in Eq. (35) Q2 [GeV2 ] ∆u + ∆¯u ∆d + ∆ ¯d ∆ 0.001-1.0 1 0.809 -0.417 0. 4 0.798 -0.417 0. 10 0.793 -0.416 0. 100 0.785 -0.412 0. 0.0-1.0 1 0.817 -0.453 0. 4 0.814 -0.456 0. 10 0.813 -0.458 0. 100 0.812 -0.459 0. 0 0.1 0.2 0.3 0.4 -0.15 -0.1 -0.05 0 0.05 -0.04 -0.02 0 0.02 -0.04 -0.02 0 0.02 -0.04 -0.02 0 0.02 10 -2 10 -1 x(Δu + Δu – ) x(Δd + Δd – ) DSSV xΔu – xΔd – xΔs – x Δχ2 =1 (Lagr. multiplier) Δχ2 =1 (Hessian) xΔg x Q 2 = 10 GeV 2 -0.1 -0.05 0 0.05 0.1 10 -2 10 -1 -0.004 -0.002 0 0.002 0.004 FIG. 4: U global fit the Hessi ing PHEN consisten Light sea anti-qua now than of more p valence quarks sea quarks & gluons 2
- 3. Why muons? W couples only to left-handed quarks and right-handed anti-quarks: At Phenix, sensitivity to , using parity violation of W production Accessing W to “know” the quark (anti- quark) polarization state! Francesca Giordano 3 W+ W dL ¯uR ¯dR uL
- 4. Francesca Giordano Hadron-Hadron collider √s of 62 GeV, 200 GeV, 500 GeV RHIC 1 Identified Forward Hadrons in p +p at RHIC J.H. Lee for Collaboration BNL April 27, DIS09, Madrid STAR PHENIX @ RHIC 4Francesca Giordano
- 5. South Muon Tracker North Muon Tracker Muon ID Proton Proton PHENIX IR µ 5
- 6. Forward muon trigger PYTHIA W old trigger -cross section dominated by W production at high PT Francesca Giordano 6 Upgrade the existing muon arms for a dedicated muon trigger! Muon momentum information Precise timing information to reject low momentum muons to reject out of time background correlate events with beam polarization
- 7. 1 beamclock Muon Tracker MuonTRG Wide Time Window: MuTracker FEE upgrades Momentum information! Francesca Giordano 7
- 8. Resistive Plate Chambers RPC1 RPC3 RPC3MuonTRG Mixed Gas 95% C2H2F4 (base gas for avalanche) 4.5% i-C4H10 (photon quencher) 0.5% SF6 (electron quencher) 20 – 40% (relative humidity) Francesca Giordano 8 0 V -9.5 kV 0 V -9.5 kV Bakelite plates: resistivity 1010 - 1011 Ω⋅cm (Phenolicpolymer) Graphite layers: resistivity ~ 100 Ω/cm2 Signal Strip: Cu strips (Induced charge) Noise Rate 0.5 ~ 5 Hz/cm2
- 9. 9 DAQ and data base computers spacer pop, gas leak test table gas distribution racks and bubblers dark current test electronics and H.V supply racks cosmic ray RPC module test stand RPC module assembly table RPC Factory (operated by UIUC) Cosmic RPC test stand 10 shelves for RPC modules Scintillators Scintillators Gas system mixer & distribution Readout electronics, LV&HV power supply Francesca Giordano
- 10. 1015 NPL, Urbana
- 11. 11 I. III. IV. V. V. 30 undergraduate students from UIUC - ACU - Muhlenberg College - Korea U. - HANYANG - GSU 20 CEU posters at DNP From UIUC: Zarah Ahmad, Alex Burnap, Max Candocia, George Deinlein, Louisa Eberle, Justine Ide, Nick Mucia, Tyler Natoli, Jessica Simpson, Jason Strack, Zach Tranchida, Emily Zarndt II. QA @BNL: I. Leak test IV. Readout electronics check III. HV & LV lines check II. Monitor Dark current V. Efficiency, Noise, Cluster size Francesca Giordano
- 12. 12 B MuTr MuTr MuTr RPC3 RPC1 RPC FEE Trigger events with straight track RPC1 Nevis crate Readout strip FEE FEE Muon trigger boardMuTr FEE RPC FEE Francesca Giordano
- 13. RPC3 installation (2009-2010 shutdowns) Octant transport in RHIC tunnel RPC3 North Station RPC3 South Station RPC3 installation in RHIC tunnel Delivery of RPC3 octant to RHIC tunnel Francesca Giordano 13
- 14. RPC3 run11 Incoming Beam Background Collision related BG RPC3 Hit map IhnJea Choi North West Francesca Giordano RPC3 Beam mezzanine Roof 14
- 15. RPC1 installation (2012 shutdown) RPC1 South Station RPC1 North Station RPC1 installation in PHENIX IR Post-installation tests Francesca Giordano 15
- 16. RPC1 run12 South North Francesca Giordano 16
- 17. RPC3: rejection powerW Trigger Rejection Power Needed to set prescale when luminosity is high We had kept two w trigger during entire pp510 GeV run period 9 10 MuTrig rejection powerYoshi-mitsu Imazu + RPC3 RPC3 trigger window reduced RPC3 trigger window reduced (no RPC3) luminosity trigger window DAQ limit ! Francesca Giordano 17
- 18. RPC1: rejection power luminosity trigger window DAQ limit ! BBCLL1(>0 tubes) novertex Rate [MHz] 0.5 1 1.5 2 2.5 3 3.5 4 RejectionPower 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 North+South W-Trigger Rejection Power Run11 SG1xMUIDxBBC(AND2_97) Run12 SG1xRPC3xBBC w/ RPC Timing Cut Run12 SG1xRPC3xBBCxRPC1(South) 2kHz DAQ Rate RPC1 included { (no RPC3) Francesca Giordano 18
- 19. RPC3 South A"modules" B"modules" C"modules" Phi"0"degree" 15" Run 365842 Fast production: find the collision- related hits Red = all hits Blue = hits associated with muon tracks RPC3 South A"modules" B"modules" C"modules" Phi"0"degree" 15" Run 365842 RPC3 South A"modules" B"modules" C"modules" Phi"0"degree" 15" Run 365842RPC3 South A"modules" B"modules" C"modules" Phi"0"degree" 15" Run 365842 RPC3 19Francesca Giordano
- 20. Fast production: find the collision- related hitsRPC1 South 22" Run 365842RPC1 20Francesca Giordano
- 21. Run 11 – 340515_0 3 Fast production: efficiency RPC3 RPC1 RPC1 Absolute Cut":""MuID"LastGap">"2,""P">"1,"" Other"cuts"are"same" RPC1"composed"of"8"octants," One"octant"divided"in"two"half"octant"in"code"" 21 ε ~ 80% During RUN 11 (500GeV PP) Effi Francesca Giordano
- 22. Thank you! 22