1 summary detector working group? eic meeting, hampton, may 2008 e.c. aschenauer e. kinney b. surrow
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Summary Detector Working Summary Detector Working group?group? EIC meeting, Hampton, May 2008 EIC meeting, Hampton, May 2008
Summary Detector Working Summary Detector Working group?group? EIC meeting, Hampton, May 2008 EIC meeting, Hampton, May 2008
E.C. AschenauerE.C. Aschenauer
E. KinneyE. Kinney
B. SurrowB. Surrow
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 22
How should the detector look likeHow should the detector look like
General requirements independent of EIC machine General requirements independent of EIC machine optionoption
cover a wide range in Qcover a wide range in Q2 2 detect scattered leptondetect scattered lepton
ep and eA need good lepton-hadron separationep and eA need good lepton-hadron separationneeded over a wide momentum rangeneeded over a wide momentum range
HermesHermes Calorimetry gives in average Calorimetry gives in average a factor 100 in lepton hadrona factor 100 in lepton hadron separation; problematic separation; problematic at low momentaat low momenta
need more PID detectorsneed more PID detectors
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 33
What is the best Detector conceptWhat is the best Detector concept
Energy loss dE/dxEnergy loss dE/dx
Cerenkov RadiationCerenkov Radiation
Too small p lever armToo small p lever arm Match radiator and lepton p-Match radiator and lepton p-rangerange
Transition Radiation:Transition Radiation:sensitive to particle sensitive to particle ((>1000)>1000)
2
2
1
1v
c
Aerogel; n=1.03
C4F10; n=1.0014
ee
1cos c n
21
m cp
Talk by M. Hartig on the ALICE TRD projectTalk by M. Hartig on the ALICE TRD project
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 44
ALICE Experiment: PID CapabilitiesALICE Experiment: PID Capabilities
(relativistic rise)
TPC: (dE/dx) = 5.5(pp) – 6.5(Pb-Pb) %TOF: < 100 psTRD: suppression 10-2 @ 90% e-efficiency
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 55
Transition Radiation DetectorTransition Radiation Detector
Radiator:• irregular structure - Polypropylen fibers - Rohacel foam (frame)• 4.8 cm thick• self supporting
Gas:• Xe/CO2 85/15 %
Drift region:• 3 cm length• 700 V/cm• 75 m CuBe wires
Amplification region:• W-Au-plated wires 25 m• gain ~ 10000
Readout:• cathode pads• 8 mm (bending plane)• 70 mm in z/beam-direction• 10 MHz
Schematic Schematic ViewView
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 66
Transition Radiation DetectorTransition Radiation Detector
Large area chambers (1-1,7 m²)Large area chambers (1-1,7 m²)
-> need high rigidity-> need high rigidity Low rad. length (15%Xo)Low rad. length (15%Xo)
-> low Z, low mass material-> low Z, low mass material
DesignDesign
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 77
Electron Identification PerformanceElectron Identification Performance
LQ Method:
Likelihood with total charge
LQX Method:
total charge + position of max. cluster
Typical signal of single particle
PID with neural network
e/-discrimination < 10-2
For 90% e-efficiency
Result of Test Beam Result of Test Beam DataData
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 88
dNch/dy = 6000
Offline Tracking PerformanceOffline Tracking Performance
Efficiency:Efficiency:• high software track-finding high software track-finding efficiencyefficiency• lower combined track efficiency lower combined track efficiency (geometrical acceptance, (geometrical acceptance, particleparticle decay )decay )• Efficiency independent of track Efficiency independent of track multiplicitymultiplicityMomentum resolution:Momentum resolution:• long lever arm ITS + TPC +TRD long lever arm ITS + TPC +TRD (4cm <r<370cm)(4cm <r<370cm)• resolution better for low resolution better for low multiplicity (p+p)multiplicity (p+p)• ppt/t/ppt t 5 % at 100 GeV/c and 5 % at 100 GeV/c and B = 0.5 TB = 0.5 T
Efficiency and Resolution for Pb+PbEfficiency and Resolution for Pb+Pb
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 99
General requirements independent of EIC machine General requirements independent of EIC machine optionoption
cover a wide range in Qcover a wide range in Q2 2 detect scattered leptondetect scattered lepton
ep and eA need good lepton-hadron separationep and eA need good lepton-hadron separationneeded over a wide momentum rangeneeded over a wide momentum range
ep and eA need hadron identificationep and eA need hadron identificationwide momentum range wide momentum range RICH RICH
ep: 1 < p < 10GeV ep: 1 < p < 10GeV > 140> 140oo; eA:; eA: ????
How should the detector look likeHow should the detector look like
http://www.jlab.org/Hall-D/meetings/php2008/talks/dallatorre.rich.ppthttp://www.jlab.org/Hall-D/meetings/php2008/talks/dallatorre.rich.ppt
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1010
THE FAMILY OF RICH COUNTERSTHE FAMILY OF RICH COUNTERS
With focalizationWith focalizationExtended radiatorExtended radiator
(gas)(gas)
the only approach the only approach
at high momenta at high momenta
(p > 5-6 GeV/c)(p > 5-6 GeV/c)
EXAMPLES: SELEX,EXAMPLES: SELEX,
OMEGA, DELPHI, SLD-CRID, HeraB, HERMES, OMEGA, DELPHI, SLD-CRID, HeraB, HERMES, COMPASS, LHCbCOMPASS, LHCb
Proximity focusingProximity focusingthin radiatorthin radiator
(liquid, solid)(liquid, solid)
Effective Effective
at low momenta at low momenta
(p < 5-6 GeV/c)(p < 5-6 GeV/c)
EXAMPLES: STAR,EXAMPLES: STAR,
ALICE HMPID, HERMES, CLEO IIIALICE HMPID, HERMES, CLEO III
DIRCDIRCQuartz as radiator and as light guideQuartz as radiator and as light guide
Effective at low momenta Effective at low momenta
(p < 5-6 GeV/c)(p < 5-6 GeV/c)
The only existing DIRC The only existing DIRC waswas in operation at BABAR in operation at BABAR
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1111
SINGLE PHOTON DETECTORS ISINGLE PHOTON DETECTORS Isinglesingle photon detectors : photon detectors :
the CENTRAL QUESTION since the beginning of the RICH the CENTRAL QUESTION since the beginning of the RICH eraera
3 groups3 groups (with examples, not exhaustive lists)(with examples, not exhaustive lists)
Vacuum based PDsVacuum based PDsPMTS PMTS (SELEX, Hermes, BaBar DIRC)(SELEX, Hermes, BaBar DIRC)MAPMTs MAPMTs (HeraB, COMPASS RICH-1 upgrade)(HeraB, COMPASS RICH-1 upgrade)
Flat pannels (various test beams, proposed for CBM)Flat pannels (various test beams, proposed for CBM)Hybride PMTs Hybride PMTs (LHCb)(LHCb)MCP-PMT MCP-PMT (all the studies for the high time resolution applications)(all the studies for the high time resolution applications)
Gaseous PDsGaseous PDsOrganic vapours - in practice only TMAE and TEA Organic vapours - in practice only TMAE and TEA (Delphi, OMEGA, SLD (Delphi, OMEGA, SLD CRID, CLEO III)CRID, CLEO III)Solid photocathodes and open geometry Solid photocathodes and open geometry (HADES, COMPASS, ALICE, (HADES, COMPASS, ALICE, JLAB-HALL A)JLAB-HALL A)Solid photocathodes and closed geometries Solid photocathodes and closed geometries (FENIX HBD, even if w/o (FENIX HBD, even if w/o imaging)imaging)
Si PDsSi PDsSilicon PMs Silicon PMs (first tests only recently)(first tests only recently)
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1212
SINGLE PHOTON DETECTORS IISINGLE PHOTON DETECTORS IIR&D:R&D:the requests:the requests: QE:QE: high QE (above standard PMT photocathodes having high QE (above standard PMT photocathodes having
peak-values of 20-25 %)peak-values of 20-25 %) r:r: rate capabilities (> 100 kHz/ mm rate capabilities (> 100 kHz/ mm22)) t:t: time resolution below 100 ps time resolution below 100 ps B:B: insensitivity to high magnetic fields (B=1T and more) insensitivity to high magnetic fields (B=1T and more) $:$: reasonable costs to make large systems affordable reasonable costs to make large systems affordable L:L: Large area and wide angular acceptance of each single Large area and wide angular acceptance of each single
sensor sensor
the approaches:the approaches:Poly- and nano-crystalline diamond-based photocathodes Poly- and nano-crystalline diamond-based photocathodes (QE)(QE)Photocathodes based on C nanotubesPhotocathodes based on C nanotubes (QE) (QE)Hybrid avalanche photodiodes HAPD Hybrid avalanche photodiodes HAPD (B) (B) Si photomultipliers Si photomultipliers (QE,r,t,B)(QE,r,t,B)Microchannel plate (MCP) PMTs Microchannel plate (MCP) PMTs (B,t)(B,t)MPGDs + CsI MPGDs + CsI (r, B, $)(r, B, $)ARCALUXARCALUX ($)($)Large, wide aperture (hybride) PMTsLarge, wide aperture (hybride) PMTs (L) (L)
astroparticle astroparticle experimentsexperiments
promisingpromisingfor a far for a far futurefuture
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1313
TECHNOLOGICAL ASPECTS TECHNOLOGICAL ASPECTS
Radiator materialsRadiator materialsaerogelaerogel material (BELLE material (BELLE upgrade, super B factory)upgrade, super B factory)radiation hardness of radiation hardness of fused fused silica silica (future DIRCs in (future DIRCs in PANDA)PANDA)gas systemsgas systems (C-F gasses: (C-F gasses: DIRAC, LHCb)DIRAC, LHCb)
Mirrors & opticsMirrors & opticsconstruction of construction of light mirrorslight mirrors (LHCb)(LHCb)Mirror Mirror reflectivityreflectivity (MAGIC) (MAGIC)Mirror alignment Mirror alignment monitoringmonitoring (COMPASS, LHCb)(COMPASS, LHCb)Mirror alignment Mirror alignment adjustment adjustment (COMPASS)(COMPASS)(Dichroic) mirrors(Dichroic) mirrors for for focusing DIRC and TOP focusing DIRC and TOP approachesapproaches
ElectronicsElectronicsSelf-triggered Self-triggered read-out read-out electronics (CBM)electronics (CBM)Fast electronicsFast electronics (COMPASS) (COMPASS)
Detector control (LHCb)Detector control (LHCb)
Patter recognition and PID Patter recognition and PID algorithmsalgorithms
Making Making use of tracking use of tracking informationinformation (ALICE, (ALICE, COMPASS, LHCb)COMPASS, LHCb)w/o trackingw/o tracking information information (HTA, ALICE)(HTA, ALICE)HL trigger capabilities HL trigger capabilities (LHCb)(LHCb)calibrationcalibration software software (LHCb)(LHCb)for for specific applicationsspecific applications
for the for the TOP TOP conceptconceptfor the for the focusing focusing aerogel RICHaerogel RICH
This is the RICH2007 shopping list;
This is the RICH2007 shopping list;
I copy it here to give a flavour about
I copy it here to give a flavour about
the effort for the technological
the effort for the technological
complements of RICH detectors
complements of RICH detectors
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1414
RADIATOR MATERIALSRADIATOR MATERIALS
the “low momentum” domain <10 GeV/c: the “low momentum” domain <10 GeV/c: Aerogel vs quartzAerogel vs quartz AerogelAerogel
Separation up to Separation up to higher momenta (but Rayleight, higher momenta (but Rayleight, transmission …)transmission …)Lower density Lower density smaller perturbationsmaller perturbation of particle of particle trajectories, trajectories, limited numberlimited number of photons (variable index of of photons (variable index of refraction to partially overcome)refraction to partially overcome)Progresses in aerogel productionProgresses in aerogel production
QuartzQuartz saturation at saturation at lower momenta (but removing lower momenta (but removing chromaticity…)chromaticity…)high density high density large numberlarge number of photons, of photons, trajectory trajectory perturbationperturbationexcellent transparency, excellent mechanical characteristics excellent transparency, excellent mechanical characteristics detectors of the DIRC familydetectors of the DIRC family
the “high momentum” domain > 10 GeV/c: the “high momentum” domain > 10 GeV/c: gas radiatorsgas radiatorslow densitylow density gasses for the gasses for the highest momentahighest momenta or the best or the best resolutions (NA62)resolutions (NA62)Still a major role played by Still a major role played by C-F gassesC-F gasses; availability of C4F10 ; availability of C4F10 ……Gas systemsGas systems for purity (transparency) and pressure control for purity (transparency) and pressure control
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1515
AEROGEL NEWS IAEROGEL NEWS I
News from NOVOSIBIRSK
PRODUCTION STATUSPRODUCTION STATUS
~2000 liters have been produced for KEDR ASHIPH detector, n=1.05
14 blocks 20020050 mm have been produced for LHCb RICH, n=1.03
~200 blocks 11511525 mm have been produced for AMS RICH, n=1.05
n=1.13 aerogel for SND ASHIPH detector
n=1.008 aerogel for the DIRAC
3-4 layers focusing aerogel
High optical parameters (Lsc≥43mm at 400 nm)Precise dimensions (<0.2 mm)
E. KRAVCHENKO E. KRAVCHENKO @ RICH2007@ RICH2007
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1616
AEROGEL NEWS IIAEROGEL NEWS II
News from JAPANNews from JAPAN3rd generation:2002- A-RICH for Belle upgrade (new solvent) Home made !
largely improved transparencyvery good homogeneity both density and chemical comp.
2-layer samples4th generation: high density aerogel
prototype result with 3 GeV/c pions
2005 sample
2001 sample
n~1.050
photon yield is not limited by radiator transparency up to ~50mmn =
1.045
n = 1.050
160mm
transmission length(400nm): 46mm
n = 1.22
60x35x10mm3
transmission length: 18mm at 400nm
I. ADACHI @ RICH2007I. ADACHI @ RICH2007
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1717
Talks on general detector R&DTalks on general detector R&D
SiPMsSiPMsTalk by Stepan Stepanyan Hall BTalk by Stepan Stepanyan Hall B
Talk by Roman Poeschl on R&D activities in EUDET Talk by Roman Poeschl on R&D activities in EUDET
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1818
SiPMsSiPMs
Hamamatsu MPPCs - low noise level and high gain, ~10Hamamatsu MPPCs - low noise level and high gain, ~1066
High efficiency (~50%) at 500 nm (green WS fibers)High efficiency (~50%) at 500 nm (green WS fibers)
Small active area, 1x1 mmSmall active area, 1x1 mm22, is not a problem for readout of 1mm , is not a problem for readout of 1mm
diameter fiberdiameter fiber
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 1919
Hamamatsu MPPC (SiPM) – S10362-11-100UHamamatsu MPPC (SiPM) – S10362-11-100U
1p.e.
3p.e.
5p.e. 7p.e.
9p.e.
11p.e.
ADC Pedestal
1 ADC ch = 5 fC
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2020
ADC spectrum from G12 exp. @ Hall-BADC spectrum from G12 exp. @ Hall-B
No selection cuts
Cut on the time difference with tagged photon
channelsADCep 75..1
~15p.e.
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2121
Summery SiPM @ Hall BSummery SiPM @ Hall B
Charged particle detector for the forward region of the CLAS was Charged particle detector for the forward region of the CLAS was designed and built using 1cm thick, 3.8x3.8 cmdesigned and built using 1cm thick, 3.8x3.8 cm2 2 scintillator plates scintillator plates (pixels) with embedded 1 mm diameter green WS fibers for light (pixels) with embedded 1 mm diameter green WS fibers for light transporttransport
As a photo detector, HAMAMATSU MPPC, S10362-11-100U, is As a photo detector, HAMAMATSU MPPC, S10362-11-100U, is usedused
Gain vs. Voltage for 100 MPPCs were measured, all 100 samples Gain vs. Voltage for 100 MPPCs were measured, all 100 samples were within the manufacture’s specificationswere within the manufacture’s specifications
Readout boards were made without pre-amps, external Readout boards were made without pre-amps, external amplifiers, Philips 778, 16 channels amplifiers are used insteadamplifiers, Philips 778, 16 channels amplifiers are used instead
From test measurements, 16 photo-electrons are expected for 2 From test measurements, 16 photo-electrons are expected for 2 MeV energy deposition for each fiber (MPPC)MeV energy deposition for each fiber (MPPC)
Preliminary beam results show no change in the gain and Preliminary beam results show no change in the gain and efficiency of MPPC. But, some of them just quit! efficiency of MPPC. But, some of them just quit!
During the summer gain characteristics of each MPPC will be During the summer gain characteristics of each MPPC will be studied in order to see effect of radiation damage, if anystudied in order to see effect of radiation damage, if any
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2222
SiPMs @ Hall DSiPMs @ Hall D
3x3 mm3x3 mm22 A35H (3640 pixels, 60% fill) A35H (3640 pixels, 60% fill)
Five 4x4 arrays (A35H) Five 4x4 arrays (A35H) first arrays first arrays everever
Detailed plan to improve performance Detailed plan to improve performance ongoingongoing
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2323
SiPMs @ Hall DSiPMs @ Hall DBCal readout: SiPMBCal readout: SiPM2.5 V
1.0 V
3.5 V
@ Room Temperature1 pe2 pe
3 pe
4 pe
5 pe
Final SiPM for BCal:Final SiPM for BCal: Size: 1.2 cm x 1.2 cmSize: 1.2 cm x 1.2 cm PDE: > 12% PDE: > 12% Dark rate: < 41MHzDark rate: < 41MHz Cross Talk: < 3%Cross Talk: < 3% Dynamic Range: 10Dynamic Range: 1044
Signal Width: < 80nsSignal Width: < 80ns
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2424
R&D @ EUDETR&D @ EUDET
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2525
R&D @ EUDETR&D @ EUDET
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2626
R&D @ EUDETR&D @ EUDET
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2727
R&D @ EUDETR&D @ EUDET
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2828
How should the detector look likeHow should the detector look like
General requirements dependent on EIC machine General requirements dependent on EIC machine optionoption
very small angle lepton detectorsvery small angle lepton detectors
integration in machine lattice; technology?integration in machine lattice; technology?
very small angle proton / nucleus detectors for very small angle proton / nucleus detectors for
diffractive / exclusive physicsdiffractive / exclusive physics
integration in machine lattice; technologyintegration in machine lattice; technology
luminosity measurement luminosity measurement
ep: 1% systematic eA: ???ep: 1% systematic eA: ???
integrate in beam lattice integrate in beam lattice background, background, acceptanceacceptance
lepton and proton polarisation measurementslepton and proton polarisation measurements
ep: 1% systematicep: 1% systematic
lepton: integration in machine lattice lepton: integration in machine lattice background background
proton: impact on proton beam proton: impact on proton beam emittance emittance
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 2929
Important Items not yet coveredImportant Items not yet covered
Magnetic field configurationMagnetic field configurationmomentum / angular resolution: momentum / angular resolution:
ep: 1% ep: 1% p/p / ?? eA: ?? / ??p/p / ?? eA: ?? / ??
could a dipol – solenoid option be used to docould a dipol – solenoid option be used to do
separate e & p(A) beamsseparate e & p(A) beams
could it be used as a analyzer for could it be used as a analyzer for exclusive/diffractive exclusive/diffractive
recoil particlesrecoil particles
impact on ELIC designimpact on ELIC designcrab crossing anglecrab crossing angle
Vertex trackerVertex trackerresolution:resolution:
ep: 25ep: 25m (?) eA: ?m (?) eA: ?
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3030
How should the detector look likeHow should the detector look like
Impact of ELIC design on detector designImpact of ELIC design on detector design design of L1-trigger for 1.5GHz repetition ratedesign of L1-trigger for 1.5GHz repetition rate
Talks by Chris Cuevas and John LajoieTalks by Chris Cuevas and John Lajoie
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3131
The RHIC DetectorsThe RHIC Detectors
• Trigger L0,L1,L2 • Parallel pipeline architecture (L0 ~1.5s)• Single pipeline (DSM “tree”)• ~1000 bytes into L0 per crossing• L0 a mix of LUT and FPGA logic• Supports “partitioned” running• Global supervisor (TSU)• ~100 Hz DAQ rate (1kHz DAQ1000)
• Trigger L1, L2 • Parallel pipeline architecture (L1 ~4s)• L1 pipeline for each trigger system• ~5200 bytes into L1 per crossing• L1 almost entirely FPGA Logic • Supports “partitioned” running• Global supervisor (GL1)• 6kHz DAQ rate (8-10 kHz in future)
STAR
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3232
Summary from RHIC Trigger experienceSummary from RHIC Trigger experience
Plan on things changingPlan on things changingThey will, multiple times, and in ways you don’t expectThey will, multiple times, and in ways you don’t expect
Design the trigger system to be as insensitive to beam Design the trigger system to be as insensitive to beam conditions as possible. conditions as possible.
Plan this from the beginningPlan this from the beginning
Keep the trigger electronics out of the IRKeep the trigger electronics out of the IRSEU’s significant at high luminositiesSEU’s significant at high luminosities
Can be mitigated if necessary, but complicatedCan be mitigated if necessary, but complicated
2ns (500 Mhz) is fast!2ns (500 Mhz) is fast!Not clear (at least to me) that future advances in FPGA logic Not clear (at least to me) that future advances in FPGA logic will push in our direction as fast as we would like. will push in our direction as fast as we would like.
R&D may be needed, ASICS are expensive…R&D may be needed, ASICS are expensive…
Progress in chips:Progress in chips:Xilinx Virtex-5 (2007) – 550 MhzXilinx Virtex-5 (2007) – 550 MhzXilinx Virtex-4 (2004) – 500 MhzXilinx Virtex-4 (2004) – 500 MhzAltera Stratix IV – 533 MhzAltera Stratix IV – 533 Mhz
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3333
Hall D @ JLabHall D @ JLab
Situation:Situation: every 2ns an electron bunch every 2ns an electron bunch 500MHz 500MHz 101088 photons/s photons/s
Rate Requirements:Rate Requirements: after level 1: < 200kHzafter level 1: < 200kHz after level 3: < 20kHz to tape (eventsize: 15kB)after level 3: < 20kHz to tape (eventsize: 15kB)
& ~300MHz EM-background& ~300MHz EM-background
Need fully pipelined and very fast readout electronicsNeed fully pipelined and very fast readout electronics
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3434
Hall D @ JLabHall D @ JLabLevel 1 Trigger – Dataflow View
CTPBCAL SUM
CTPFCAL SUM
TOF HIT COUNT
START COUNTERHIT COUNT
TAGGER ENERGY
SSPENERGY SUM(8 INPUTS)
FADC
FADC
FADC
FADC
FADC -VXS-
-VXS-
-VXS-
-VXS-
-VXS-
-Fiber links-12 Crates
-Fiber links-12 Crates
-Fiber links-2 Crates* Longest Link *
-Fiber links-2 Crates
-Fiber link-1 Crates
GTP
Select FCAL Energy,BCALEnergy,PhotonEnergy,ANDHit Counts<,>,=
TRIGGERSUPERVISOR
-----------------CLOCKTRIGGERSYNC
ROC CONTROL
Signal distribution to Front End Crates (Fiber Links)
SSPENERGY SUM(8 INPUTS)
SSPHIT COUNT(8 INPUTS)
SSPHIT COUNT(8 INPUTS)
SSPPHOTON E(8 INPUTS)
‘Crate’ ‘SubSystem’ ‘Global’ ‘Trigger Supervisor’
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3535
How should the detector look likeHow should the detector look like
Impact of ELIC design on detector designImpact of ELIC design on detector design design of L1-trigger for 1.5GHz repetition ratedesign of L1-trigger for 1.5GHz repetition rate
Talks by Chris Cuevas and John LajoieTalks by Chris Cuevas and John Lajoie need numbers on reachable IP vacuum for ELICneed numbers on reachable IP vacuum for ELIC
to calculate as soon as possible hadronic background to calculate as soon as possible hadronic background andand
occupancyoccupancy
all detectors have to be extremely fastall detectors have to be extremely fast conventional wire chambers excludedconventional wire chambers excluded Cerenkov to trigger on scattered electron – maybeCerenkov to trigger on scattered electron – maybe proton & lepton forward detectors can they work???proton & lepton forward detectors can they work???
high occupancy due to beam gas eventshigh occupancy due to beam gas events fine segmentation fine segmentation detector cost detector cost pumps in IR pumps in IR acceptance acceptance
lepton and hadron polarimeterslepton and hadron polarimeters how can we measure bunch polarizations @ 1.5GHzhow can we measure bunch polarizations @ 1.5GHz need to sort out polarization bunch patternneed to sort out polarization bunch pattern
EIC @ Hampton May08EIC @ Hampton May08 E.C. AschenauerE.C. Aschenauer 3636
Summary & OutlookSummary & Outlook
Very interesting talks during the subgroup meeting Very interesting talks during the subgroup meeting Need to address the important questions soonNeed to address the important questions soon
Magnetic field, .......Magnetic field, .......
Should go for a an easy to use detector simulationShould go for a an easy to use detector simulationmaybe a full blown Geant4 is a bit earlymaybe a full blown Geant4 is a bit early
interesting talk from Mark Ito on parametric MC interesting talk from Mark Ito on parametric MC optionsoptions
More regular contact between working groups More regular contact between working groups would be helpfulwould be helpful
top related