The Nosecone The Nosecone CalorimeterCalorimeter

an updatean updatePHENIX DC Upgrades MeetingPHENIX DC Upgrades Meeting

R. SetoR. Seto

Nov. 8, 2005Nov. 8, 2005

plan for todayplan for today

Rich (a completely bureaucratic talk)Rich (a completely bureaucratic talk) Physics motivationPhysics motivation

simulations (also covered by EK)simulations (also covered by EK) collaboration/managementcollaboration/management FundingFunding CDR preparationCDR preparation

EduoardEduoard Update on Technology solutionUpdate on Technology solution

simulationssimulations R and D R and D

Present tasksPresent tasks

Physics Physics Motivation/SimulationsMotivation/Simulations

Heavy Ion PhysicsHeavy Ion Physics hard scatteringhard scattering

Gamma-jetGamma-jet heavy flavorheavy flavor

Chic Chic charm charm

pA collisions and the CGC and pA collisions and the CGC and Nucleon structure Nucleon structure

direct photonsdirect photons dileptonsdileptons hadronshadrons jetsjets

Spin Structure Spin Structure Delta GDelta G

Gamma-jetGamma-jet NCC will help both low-x and high -NCC will help both low-x and high -

xx TransversityTransversity W’s (isolation)W’s (isolation)

Pi0 Pi0 at high E, at high E,

two photonstwo photons total Etotal E assymassym

PhotonsPhotons ElectronsElectrons JetsJets

NCC

in pp, pA, AAin pp, pA, AA 1<y<31<y<3

MPC 3<y<4MPC 3<y<4

Coverage by calorimetry -4<y<4

together with VTX, PHENIX becomesa large acceptance ~4π detector

reminder and summary of reminder and summary of “old” simulations“old” simulations

Energy resolution 20%/sqrt(E)Energy resolution 20%/sqrt(E) Jet energy measurement possible 100%/sqrt(E)Jet energy measurement possible 100%/sqrt(E) CC

measurements possible to measurements possible to ~2.5 in central Au-Au~2.5 in central Au-Au Direct photon measurements Direct photon measurements

in Au-Au (for in Au-Au (for -jet measurements)-jet measurements) ~1, p~1, pTT> 6> 6

~1.5, p~1.5, pTT> 8> 8

~2, p~2, pTT> 10> 10

in pp and dAu in pp and dAu all all ~2, p~2, pTT> 2-4 depending on > 2-4 depending on

electron energy resolution

jet energy measurement

hadroniccompartment

vasily

hadron rejection ~10hadron rejection ~10-2-2 to 10 to 10--

33

charged pi in pp

remainder after cut

cut is based on longitudinal shower shape only (we will need to include the lateralshape in the algoritm)

hadron rejectionratio

vasily

measuring the measuring the χχCC

Central 0-10% Au-Au mCentral 0-10% Au-Au m-m-m (with background) (with background)

Assume RHIC II statistics, i.e. 10x our planAssume RHIC II statistics, i.e. 10x our plan use 10X (10% central of run 8 – 1500 ub-1)use 10X (10% central of run 8 – 1500 ub-1)

=2.5-3.0=2.5-3.0

=2.0-2.5=2.0-2.5

=1.5-2.0=1.5-2.0

=1.0-1.5=1.0-1.5

backgroundbackgroundsubtractedsubtracted

Direct photons: central Au+Au

y=1-1.5

pt

dir photonFrom Pythia(5GeV cut)

bkg (simulated)

bkg (extrapolated)

Problem is pile up faking a photon, pessimistic evaluation (no gamma/pi0 rejection)

Problem worst at high y since the effective segmentation is larger Statistics is central 10% of run 8 – 1500 ub-1

pi0’s is from fitting Au-Au pi0

dir photon

lack bkg statisticfor study

=1-1.5 =1.5-2

=2.5-3=2-2.5

Ok to ~2.5 At ~1. require pT~6 GeV Below that we have to

subtract statistically

=1-1.5 =1.5-2

=2.5-3=2-2.5

All OK

=1-1.5 =1.5-2

=2.5-3=2-2.5

central 20% dAucentral 20% dAu pppp

10 GeV 10 GeV 10 GeV 10 GeV 10 GeV 10 GeV

10 GeV 10 GeV pt

The plots for the Edep rejection are attached. The cuts are cone radius R1=0.25, R2=0.5, R3=0.75, R4=1.0, where R=sqrt(deta**2 + dphi**2) as usual. The blue histograms are for W->mu, and the red histograms are for jet events. In the Pythia events I triggered on pt >= 10 GeV muons from W, and on charged hadrons for the jet events, in the acceptance of the muon arms, and then integrated all the energy in a cone radius (and in the acceptance of the NCC), with a response of 1 for photons and electrons, 0.5 for pi,K,p, and 0.4 for neutrals (K0L, n). The distributions are normalized to 1.

In eff_rej I plot the rejection of the jet events (reddish histograms) and the efficiency for the W->mu (bluish histograms). For the W->mu efficiency curves, it goes as R1 to R4, from top to bottom, while for the jet rejection curves, it goes from R4 to R1, top to bottom.

W isolation Mickey

R4<1R3<.75R2<.5R1<.25D0 uses R<.4

R1

R1

R4

R4

R1 for R<R3kill 90% of jetskeep 80% W’s

W eff

jet rejection

Energy around W muons

Energy around jet

require PT>10 GeV

new PISA studiesnew PISA studies

NCC in pisa (Vasily); not “final” design NCC in pisa (Vasily); not “final” design found “normalization”found “normalization” Clustered “photons” w/ primitive clustering algoritmClustered “photons” w/ primitive clustering algoritm Found energy and position of each photonFound energy and position of each photon No pi0/gamma used yetNo pi0/gamma used yet

Threw sample of single pi0’s for reconstruction Threw sample of single pi0’s for reconstruction excerciseexcercise 1 to 5 GeV momentum1 to 5 GeV momentum 10-30 degrees10-30 degrees both gammas had to hit NCCboth gammas had to hit NCC required gamma to be separated by 2 cmrequired gamma to be separated by 2 cm required E1 and E2 > 0.5 GeVrequired E1 and E2 > 0.5 GeV |E1-E2|/(E1+E2)<0.5|E1-E2|/(E1+E2)<0.5

Energy Energy resolutionresolution

31%/sqrt(E) for higher E

22%/sqrt(E) for E<5

E (GeV)

E (GeV)

Position Resolution

cm

displaydisplay

top lefttop left

all 3 viewsall 3 views

bottom rightbottom right

3 views3 views

colors are colors are photons photons foundfound

““mass” is mass” is real massreal mass

““mass mass recon” – recon” – is is reconstrureconstructed cted massmass

1C 2C 3Cg/pi0

1C1C

2C

2C

g/pi0

3C

3C

all compartments

the gamma/pi0 at workthe gamma/pi0 at work

pi0 resolution E<5 GeVpi0 resolution E<5 GeV

input from pisa to NCCinput to pisasmear mass

final mass reconbut use real angles

final mass reconstructedafter cluster finding etc

GeV

GeV

GeV

GeV

Now add other particlesNow add other particles Primary sample pi0: 1-5 GeVPrimary sample pi0: 1-5 GeV add charged pi’s 1-5 GeVadd charged pi’s 1-5 GeV So extra particles add bkg So extra particles add bkg

do mixed subtraction in AuAudo mixed subtraction in AuAu

pi0 only

add 1 pi

add 2 pi

add 4 pi

bkg

future studies (next month)future studies (next month)

PerformancePerformance to what energy does 2photon+asym pi0 detection work?to what energy does 2photon+asym pi0 detection work? How much can we improve direct photon using How much can we improve direct photon using

gamma/pi0gamma/pi0 Study what can be done with current jet energy resolutionStudy what can be done with current jet energy resolution

PhysicsPhysics redo redo χχCC and direct photon study with more realistic assumptions and direct photon study with more realistic assumptions

(resolutions etc)(resolutions etc) simulation correlation and error bars onsimulation correlation and error bars on

photon – jet (pi0) in AuAuphoton – jet (pi0) in AuAu measure x in direct photon and photon-photon in pp (spin)measure x in direct photon and photon-photon in pp (spin)

i.e. delta G measurementi.e. delta G measurement Reaction plane measurement (Shinichi)Reaction plane measurement (Shinichi)

CollaborationCollaboration USAUSA

BNL:labBNL:lab Physics (Management, Design, Physics (Management, Design,

Integration, engineering etc)Integration, engineering etc) Instrumentation (engineering, Instrumentation (engineering,

Gamma/pi0 design, front end Gamma/pi0 design, front end chip)chip)

UCR (Simulations, management, UCR (Simulations, management, software)software)

ISU (Trigger, Simulations)ISU (Trigger, Simulations) UIUC (Simulations, Physics ideas)UIUC (Simulations, Physics ideas) Nevis (chi – FEE readout)Nevis (chi – FEE readout)

Korea (Si- pads/gammapi0)Korea (Si- pads/gammapi0) YonseiYonsei EwhaEwha SENS: companySENS: company ERTI:companyERTI:company

JapanJapan Riken (lab)Riken (lab)

Czech Republic (Gamma/pi0 Czech Republic (Gamma/pi0 testing, constuction)testing, constuction) Charles UCharles U Academy of SciencesAcademy of Sciences Prague Tech UPrague Tech U ON semiconductor:companyON semiconductor:company

RussiaRussia Moscow State U (Si pad design, Moscow State U (Si pad design,

testing, engineering)testing, engineering) JINR-Dubna – 2 groups (lab) JINR-Dubna – 2 groups (lab)

(Engineering, Mechanics, (Engineering, Mechanics, tungsten, assembly)tungsten, assembly)

MEPHI (front end electronics)MEPHI (front end electronics) Ekaterinbourg (company- board (company- board

assembly)assembly) RIMST-ELMA (company-RIMST-ELMA (company-

Si construction)Si construction)

Management PlanManagement Plan

We will have to work out a We will have to work out a management structure – once we management structure – once we have all the responsibilities assigned have all the responsibilities assigned For construction (EK)For construction (EK) For Money DOE/Riken/Other (RKS)For Money DOE/Riken/Other (RKS)

FundingFunding Small amount of funding so far for R and DSmall amount of funding so far for R and D

Riken, UCR, BNL, Local Russian funding for themselves, Riken, UCR, BNL, Local Russian funding for themselves, Czech for themselves (a fair amount)Czech for themselves (a fair amount)

What do we need?What do we need? R and DR and D I claim with $3M in cash we can build one sideI claim with $3M in cash we can build one side

this might change as we do a better cost estimate in the next this might change as we do a better cost estimate in the next month month

Purchasing Si and W now (~200K worth Riken)Purchasing Si and W now (~200K worth Riken) Major funding (hopes!!!)Major funding (hopes!!!)

Riken $1.5MRiken $1.5M DOE ~$2m - $5MDOE ~$2m - $5M Other ~$1MOther ~$1M

Major question - timingMajor question - timing

Schedule in the next couple Schedule in the next couple monthsmonths

CDRCDR Skeleton in CVS (CVS co offline/analysis/NCCCDR)Skeleton in CVS (CVS co offline/analysis/NCCCDR) Major tasksMajor tasks

WritingWriting Cost estimateCost estimate TimelineTimeline

Dec ~4 CDR to collaborationDec ~4 CDR to collaboration EC/DC etc reviewEC/DC etc review

Jan Jan BNL ReviewBNL Review

Feb – To DOEFeb – To DOE Beam Tests – now at Dubna (Vasily/Andrei with Merkin, Litvinenko etc) Beam Tests – now at Dubna (Vasily/Andrei with Merkin, Litvinenko etc)

beam test 9beam test 9thth to 13 to 13thth (1 (1stst prototype) prototype) Korea Trip Nov 14-18 – EK/RKSKorea Trip Nov 14-18 – EK/RKS

In the next yearIn the next year Large prototype being designed (with gamma/pi0)Large prototype being designed (with gamma/pi0) Full electronicsFull electronics

CommissionNCC proto 1

Old Gannt chart from LOI

CDR writing/reading teamCDR writing/reading team

Readers Readers PHENIX folksPHENIX folks

Ahbay - spin, and pAAhbay - spin, and pA Ed Kinney - SpinEd Kinney - Spin Atsushi - lots of it (design Atsushi - lots of it (design

etc)etc) Matthias - lots of it.Matthias - lots of it. Ken – spinKen – spin Miraslov Finger (Charles Miraslov Finger (Charles

Univ)Univ) Outside folksOutside folks

Raju Venugopalan (pA - Raju Venugopalan (pA - saturation)saturation)

Mark Strickman - nucleon Mark Strickman - nucleon strucutrestrucutre

Dima KharzeevDima Kharzeev

writers writers RKSRKS EKEK Mickey (spin)Mickey (spin) Jen-Chieh (pA and nucleon Jen-Chieh (pA and nucleon

structure)structure) Mark Strikman (pA and Mark Strikman (pA and

nucleon structure)nucleon structure) John L (hard scattering)John L (hard scattering) jamie (charm and chic)jamie (charm and chic)

Could use another person Could use another person in each of spin, heavy ion, in each of spin, heavy ion, pApA

CDR OutlineCDR Outline 1. Executive Summary (RKS)1. Executive Summary (RKS) 2. Physics Overview2. Physics Overview

(a) Heavy Ion Physics(a) Heavy Ion Physics i. Gamma-jet (John L I hope)i. Gamma-jet (John L I hope) ii. Chic (Jamie)ii. Chic (Jamie) iii. charm (Jamie)iii. charm (Jamie)

(b) pA collisions and the CGC (b) pA collisions and the CGC (Jen-Chieh+R. Seto)(Jen-Chieh+R. Seto)

i. direct photonsi. direct photons ii. dileptonsii. dileptons iii. hadronsiii. hadrons iv. jetsiv. jets

(c) Spin Structure of the (c) Spin Structure of the nucleon (Mickey - how much?)nucleon (Mickey - how much?)

i. Wi. W ii. Delta G Gamma-jetii. Delta G Gamma-jet iii. Transversityiii. Transversity

(d) Nucleon structure (Jen-(d) Nucleon structure (Jen-Chieh)Chieh)

3. Physics 3. Physics Measurements with Measurements with the NCC (RKS)the NCC (RKS) (a) Performance(a) Performance

i. Pi0i. Pi0 ii. Photonsii. Photons iii. Electronsiii. Electrons iv. Jetsiv. Jets

(b) Physics reach(b) Physics reach i. Heavy Ion Physicsi. Heavy Ion Physics ii. Spin Structureii. Spin Structure iii. Nucleon Structureiii. Nucleon Structure

(c) Physics reach with (c) Physics reach with the all Upgradesthe all Upgrades

outline (cont)outline (cont)

4. The design of the NCC (EK)4. The design of the NCC (EK) (a) Overview(a) Overview (b) The Calorimeter(b) The Calorimeter (c) EM compartment(c) EM compartment (d) Hadronic compartment(d) Hadronic compartment (e) Gamma pi0 detector(e) Gamma pi0 detector (f) Electronics(f) Electronics (g) Mechanics and Cooling(g) Mechanics and Cooling (h) Integration(h) Integration (i) Triggering(i) Triggering

5. R and D (EK)5. R and D (EK) 6. Project Management and 6. Project Management and

Responsibilities (RKS)Responsibilities (RKS) (a) Overview(a) Overview (b) Management Structure(b) Management Structure (c) Responsibilities(c) Responsibilities

7. 7. Budget and Schedule (RKS, Budget and Schedule (RKS, EK)EK)

(a) Total Estimated Cost (TEC)(a) Total Estimated Cost (TEC) (b) Contingency Analysis(b) Contingency Analysis (c) Overhead(c) Overhead (d) Budget(d) Budget (e) Fiscal Responsibilities(e) Fiscal Responsibilities (f) Schedule(f) Schedule

8. 8. AppendicesAppendices