phenix future plans & upgrades
DESCRIPTION
PHENIX Future Plans & Upgrades. Stefan Bathe for PHENIX, Users’ Meeting 2009. 2008. 2008. HBD. 2009. 2008. HBD VTX. 2009. 2011. 2008. HBD VTX FVTX. 2009. 2011. 2012. 2008. HBD VTX FVTX. 2009. 2011. 2012. FOCAL. 2013?. 2008. HBD VTX FVTX. 2009. 2011. 2012. FOCAL. - PowerPoint PPT PresentationTRANSCRIPT
PHENIX FUTUREPLANS & UPGRADES
Stefan Bathe for PHENIX, Users’ Meeting 2009
Users’ Meeting 2009Stefan Bathe2
2008
Users’ Meeting 2009Stefan Bathe3
HBD
2008
2009
Users’ Meeting 2009Stefan Bathe4
HBDVTX
2008
20092011
Users’ Meeting 2009Stefan Bathe5
HBDVTXFVTX
2008
200920112012
Users’ Meeting 2009Stefan Bathe6
HBDVTXFVTX
FOCAL
2008
200920112012
2013?
Users’ Meeting 2009Stefan Bathe7
HBDVTXFVTX
FOCAL MuTr FEE
2008
200920112012
2013? 2009/10
Users’ Meeting 2009Stefan Bathe8
HBDVTXFVTX
FOCAL MuTr FEE
RPC
2008
200920112012
2013? 2009/10
2010/11
Users’ Meeting 2009Stefan Bathe9
HBDVTXFVTX
FOCAL MuTr FEE
RPC
Pb absorber
2008
200920112012
2013? 2009/10
2010/11
Users’ Meeting 2009Stefan Bathe10M
uon
trac
king
Muo
n tr
acki
ng
VTX & FVTX MPCMPC
-3 -2 -1 0 1 2 3 rapidity0
f
cove
rage
2p
EMC
EMC
FOCALFOCAL
track
ing
track
ing
MuTrig MuTrig
Hadron Blind Detector (HBD)
Users’ Meeting 2009Stefan Bathe
11
Windowless Cerenkov detector with CF4 avalanche/radiator gas (2 cm pads)signal electron
Cherenkov blobs
partner positronneeded for rejection e+
e-
qpair openingangle
~ 1 m
Designed for low-mass dileptons in A+A
Removes Dalitz and conversion pairs (small opening angle)
Comissioned in Run-9 p+pCsI photocathode covering triple GEMs
HBD Physics
Users’ Meeting 2009Stefan Bathe
12
Study electron continuum in low Mee region
Measure in medium-modifications of r, w, f
Chiral symmetry restoration
Measure temperature (internal conversion of direct photons) arXiv:0706.3034
HBD Performance
Users’ Meeting 2009Stefan Bathe
13
Clear separation of signal and background
Suppression of background pairs increases effective statistics by factor 8-16
Taking data in Runs 9, 10
Will be replaced by VTX after Run-10
~40 pe
~20 pe
few pe hadron blind
background (Dalitz,
conversion): 40 photo-electrons
signal(separated
electrons): 40 photo-electrons
Measured in Run-9
Silicon Vertex (VTX & FVTX)
Users’ Meeting 2009Stefan Bathe
VTX: silicon VerTeX barrel tracker Fine granularity, low occupancy
50mm×425mm pixels for L1 and L2 R1=2.5cm and R2=5cm
Stripixel detector for L3 and L4 80mm×1000mm pixel pitch R3=10cm and R4=14cm
Large acceptance |h|<1.2, almost 2p in f plane
Standalone tracking
FVTX: Forward silicon VerTeX tracker 2 endcaps with 4 disks each pixel pad structure (75mm x 2.8 to
11.2 mm)FVTX endcaps1.2<|h|<2.7 mini strips
VTX barrel |h|<1.2
VTX Physics
Users’ Meeting 2009Stefan Bathe
15
Heavy Flavor as probe of dense partonic matter in A+A
RAA(pT) of single electron from charm decay and beauty decay separately
v2 (pT) of single electron from charm decay and beauty decay separately
Jet tomography (di-hadron, g-hadron, and c-hadron correlation)
Gluon polarization DG(x) in polarized p+p
Double spin asymmetry ALL of heavy flavor production (charm and beauty, separately)
ALL of g-jetPRL 98, 172301 (2007)
VTX Performance
Users’ Meeting 2009Stefan Bathe
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Strong suppression of single electrons from heavy flavor is one of most surprising results
Present measurement is mixture of b and c VTX can separate b and c
Expected with VTX (0.4/nb ~3 weeks in RUN11)
VTX Progress
Users’ Meeting 2009Stefan Bathe
17
Pixel Detector Ladder
Strip Detector LadderStrip read-out
Pixel read-out Test Beam at FNAL
Installation in 2010
Successful DOE review this week
FVTX Physics & Schedule
Users’ Meeting 2009Stefan Bathe
18
adding high resolution tracking points for muons ahead of the hadron absorber
utilized together with muon arm tracks
quarkonium spectroscopy to probe color screening in medium
Single muons Background suppression for
direct photons in FOCAL Installation for Run-12
Without FVTX
WithFVTX
Prototype DAQ Electronics
The W
Users’ Meeting 2009Stefan Bathe
19
Energy v.s. Inclination of the track
W candidates, PHENIX Run-9, p+p@500 GeV
W program has started
Central arm ready for W measurement at mid-rapidity
Backward/forward measurement needs upgrade
Users’ Meeting 2009Stefan Bathe20
MuID- only existing trigger- no momentum selectivity..
<Muon Trigger Upgrade>• MuTr FEE Upgrade (MuTRG)• Install RPC (Resistive Plate Chamber)• Install additional Pb absorber
21
Rapidity: 1.2 < h <2.2 (2.4)
RPC
B
Basic Idea:Measure Δstrip in online level-> more momentum selective trigger
Muon Trigger
Animation byKen’ichi Karatsu
MuTrig Status MuTr.N
operational for Run-9
Good efficiency
Users’ Meeting 2009Stefan Bathe
22
From collision orout going beam
From beambackground
Engineering run for sectors in 2 RPC planes on south arm
Timing resolution helped understand background already now
Muon Trigger Physics: W
Users’ Meeting 2009Stefan Bathe
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W parity violating Single (longitudinal) spin
asymmetry W selects (anti-)quarks
with negative (positive) helicity in polarized beam
Lepton rapidity determined by x of valence and sea quark as well as helicity of neutrino
Polarization of sea quarks
W sensitivity
Users’ Meeting 2009Stefan Bathe
24
24Central Arms: ready for W measurement
Muon Arms: trigger upgrade is ongoing will be ready for next 500 GeV run
(l- pT>20 GeV)
(l+ pT>20 GeV)
FOrward CALorimeter (FOCAL)
Users’ Meeting 2009Stefan Bathe
25
Tungsten absorber with silicon pad readout 1< h <3 2 p azimuth 24 X0 deep
3 layers pad readout for lateral and longitudinal shower profile Reject hadronic
background Si strips within first X0 for g/p0 ID
17 cm
6cm
85 cm
FOCAL Physics
Users’ Meeting 2009Stefan Bathe
26
Trigger on neutral pions and photons
Provide coincidence measurements with central arm
Constrain kinematics (x) p+p
Low x gluons Transverse spin physics
d+Au Gluon saturation in nucleus Pin down initial state in HI
collisions Au+Au
g-jet
pA physics – nuclear gluon pdf
Geant simulation20 GeV p0
FOCAL Status R&D ongoing
Users’ Meeting 2009Stefan Bathe
27
Test beam
DAQTRIG2010 Upgrade Currently
DAQ 5kHz bandwidth Up to Run-7, PHENIX able
to record every Au+Au mbias event (in Run-7: 80% of 7 kHz)
In p+p, Lvl1 triggers reduce 200-400 kHz rate to 6kHz of useful events
PHENIX able to effectively sample full luminosity for all rare channels
Users’ Meeting 2009-Stefan Bathe
28
Future 7MHz p+p@500GeV 2MHz p+p@200GeV 40kHz Au+Au Event size *1.7 with Si
detectors
Previous trigger strategy won’t work
DAQTRIG2010 Upgrade Possible solutions
Replace 10-year old EMCal electronics Medium-scale upgrade to DAQ
e.g. upgrade central data switch to 10 Gigabit networking
Various other small upgrades BBC w/ multiple vertex selection MuID Trigger FPGA upgrade VTX integration trigger
Users’ Meeting 2009Stefan Bathe
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Timeline
Users’ Meeting 2009Stefan Bathe
30
RHIC PHENIXRUN9 First 500 GeV pp mTrig
FEE (half)long 200 GeV pp
RUN10stoch. cooling 2 mTrig FEE(full)
mTrig RPC(South)
RUN11EBIS (U+U) VTX mTrig
RPC(North)RUN1256 MHz RF FVTX
(electron lensing?)RUN13(e cooling AGS?) (Forward
Cal?)
Energy Scan PHENIX seriously
looking into low energy running Low energy task
force founded; reported in May
Suggestion to focus at first between full and injection energy
Opportunity to investigate dileptons in new energy regime with HBD
Users’ Meeting 2009Stefan Bathe
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Physics How do dilepton excess
and r modification at SPS evolve into large low-mass excess at RHIC?
opacity of the produced medium, elliptic flow
onset of perfect liquid properties
Search for critical point Search for 1st order
phase transition
Beyond the next couple years . . . Transverse spin physics to understand
nucleon pA to understand initial state of HI
collisions DG with direct g and g-jet in high
luminosity 200 GeV p+p (cleaner than p0)
g-h, g-jet in high-luminosity Au+Au to measure modification of fragmentation function
. . . Users’ Meeting 2009Stefan Bathe
32
Conclusions
Users’ Meeting 2009Stefan Bathe
33
PHENIX has healthy upgrade program to carry current exciting results to further understanding
Immediate plans (next two years) determined by upgrade installation schedule (HBD, VTX)
Successful physics program relies on sufficient funding for 10 weeks each of HI and Spin running each year
Many opportunities for immediate and long-term future
Users’ Meeting 2009Stefan Bathe34
HBDVTXFVTX
FOCAL MuTr FEE
RPC
Pb absorber200920112012
2013? 2009/10
2010/11
2008