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Sıra DOSYA ADI Format Bağlantı
01. Proposals Lepton Resolution Hadron pptx Sunumu İndir

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TK Hemmick for the EIC Tracking R&D GroupLetter of Intent for Detector R&D Towards an EIC DetectorBrookhaven National LaboratoryFlorida Institute of TechnologyIowa State UniversityLawrence Berkeley National LaboratoryMassachusetts Institute of TechnologyRiken Research Center at BNLStony Brook UniversityUniversity of VirginiaYale University
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The Physics we want to study What is the role of gluons and gluon self-interactions in nucleons and nuclei? Observables in eA / ep: elastic/diffractive events: rapidity gap events, elastic VM production, DVCSinclusive events: structure functions F2A, FLA, F2cA, FLcA, F2p, FLp,……… What is the internal landscape of the nucleons? What is the nature of the spin of the proton? Observables in ep inclusive & semi-inclusive events: Asymmetries polarized cross-sections, inclusive events: electroweak Asymmetries (g-Z interference, W+/-) What is the three-dimensional spatial landscape of nucleons? Observables in ep/eA semi-inclusive events: single spin asymmetries (TMDs) elastic/diffractive events: cross sections, SSA of exclusive VM, PS and DVCS (GPDs) What governs the transition of quarks and gluons into pions and nucleons? Observables in ep / eAsemi-inclusive events: cross sections, ReA, azimuthal distributions, jets2
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Deep Inelastic Scattering3Measure of resolution powerMeasure of inelasticityMeasure of momentum fraction of struck quarkKinematics:Challenge:need to cover wide range in beam energies lepton: 5 - 30 GeVhadron (p/Au) 100 – 325 GeV / 50 – 130 GeVResolution in x, Q2 dominated how well the scattered lepton is measuredorhow well the hadronic method works large acceptance for hadronic final statee- p/A0o 180o Q2 q2 (k k)2Q2 2EeEe(1 cose ')y pqpk1 EeEecos2e2x Q22 pqQ2sy
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DIS Kinematics4y=0.05y=0.85 Strong x-Q2 correlation high x high Q2 low x low Q2low y limited bytheta resolution for e’ use hadron methodhigh y limited byradiative correctionscan be suppressed byby requiring hadronicactivity HERAy>0.005
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Important for Detector Design Detector must be multi-purpose One detector for inclusive (ep -> e’X), semi-inclusive (ep->e’hadron(s)X), exclusive (ep -> e’pp) reactions in ep/eA interactions run at very different beam energies (and ep/A kinematics) Ep/A/Ee ~ 1 – 65 HERA: 17 – 34; lepton beam energy always 27GeV Inclusive DIS: with increasing center-of-mass energy lepton goes more and more in original beam direction high Q2 events go into central detector low Q2 events have small scattering angle and close to original beam energy need low forward electron tagger for low Q2 events low-mass high resolution trackers over wide angular acceptance Semi-Inclusive DIS hadrons go from very forward to central to even backward with lepton beam energy increasing good particle-ID over the entire detector Exclusive Reactions: decay products from excl. r / f / J/ψ go from very forward to central to even backward with lepton beam energy increasing 5
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Additional Remarks Charm detection structure functions detecting lepton form decay in addition to scattered via displaced vertex should be enough charm in fragmentationneed to reconstruct D0 meson completely to measure its z good PID Very high luminosity 1034 cm-1s-1 will be systematic limited in many measurement needs a lot of care to account for this in the designdetector: alignment, ……polarization measurementsluminosity measurement6
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Emerging Detector Concept7high acceptance -5 < h < 5 central detectorgood PID and vertex resolution (< 5m)tracking and calorimeter coverage the same good momentum resolution, lepton PIDlow material density minimal multiple scattering and brems-strahlungvery forward electron and proton detection dipole spectrometers low Q2 e’ Spectrometer:
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Why a LOI Response to a Call for Proposals? The EIC community is an ever-growing and diverse set of scientists with a broad range of physics goals. Tracking and PID technologies must be driven by the physics goals of the EIC, not by the technology du jour. Detector performance a “coupled problem”e.g. Q2 from scattered e OR hadron method, … Success will be defined by Gathering a community that cross-cuts R&D with physics. Use diverse experience to formulate reasoned plans. Our Letter of Intent: Announces a fledgling community taking on this task. Contains requests for small scale “seed grant” work. Promises a full R&D tracking proposal in one year’s time.
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Brookhaven Lab Hadron-Blind Detector Chevron charge division Fast drift TPC ASIC development VUV spectrometry
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Florida Institute of TechnologySingle-mask GEM cross sectionCERN workshops CMS High-h GEM Upgrade RD51 SRS readout System Large-Area GEM production
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Stony Brook University Hadron-Blind Detector Large Clean Room Gas Chromatography CsI Photocathodes
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University of Virginia Prototype GEM tracker tested at Jlab now Super Big Bite SoLIDprototype tracker prepared for beam test.
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Yale University STAR Forward GEM Tracker Developed Strip-pixel readout system. Short term proposal: 3-coordinate strip-pixel readout.
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Not requesting funds… Iowa State University MIT Lawrence Berkeley Laboratory Los Alamos National Laboratory
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Simulation Issues to be addressed: Material and position resolution budgets: Possibly depends upon source of Q2: electron P of hadron reco. Choices between Fast Drift TPC & GEM tracking outside of the thin micro-vertex tracking layer Nothing is thinner than a TPC. Can it be fast enough to resolve multiple tracks? Trade-offs between detector thickness and EMC-resolution What form of B-insensitive detector can be used for PID? RICH with various readout choices:CsI photocathode, SiPM High Resolution TOF alone or within RICHG-APD, MCP-PM readouts… Proximity-focus RICH in central arm. Can PID momentum-limits be extended via blob-ID?? Limits on Ring radius resolution due to B-field, M-Scat. High performance dE/dx measurements via Cluster Counting.15
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Simulation framework… The most important work over the coming year involves simulations to propose viable technology choices for R&D. A simulation framework exists. The work plan involves driving processes: FL drives momentum precision. Ds drives PID.
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Hardware tasks during 1st year Measurements of fast TPC performance characteristics. Development of very large area GEM detectors. Development of GEM-based CsI-photocathode detectors for PID in barrel and endcap. Development of methods to minimize electronics-indiced gaps in large area GEM detectors. Development of a 3-coordinate strip-pixel readout.17
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GEM TPC Test Facility in BNL Physics DeptFast Drift TPC DevelopmentDouble GEM Readout Designed and built by BNL Instrumentation DivisionGEM Readout TPC for the Laser Electron Gamma Source (LEGS) at BNLCustom ASIC • 32 channels - mixed signal• 40,000 transistors• low-noise charge amplification• energy and timing, 230 e-, 2.5 ns • neighbor processing• multiplexed and sparse readout G. De Geronimo et al., IEEE TNS 51 (2004)
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Follow up on previous BNL R&D to reduce required strip & channel numbers. Position errors < 80µm achieved with 2mm strip pitch in small prototypes:Large-Area Readout Using Zigzag Strips-100-80-60-40-200204060801003000 3500 4000 4500 5000 5500 6000 6500 7000Reconstructed Position [µm]Position Error [µm] Bo Yu, BNLTest performance with medium-size 3-GEM det. using analog SRS readout with APV25 hybrid cards(128 ch. per card) at BNL & Florida Tech Bo Yu, BNLHans Muller, CERNFirst commercially produced front-end APV25 hybrids (RD51)30cm × 30 cmTriple-GEM
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CsI Photocathode Research The Stony Brook group wishes to investigate the feasibility of CsI-coated GEMs as a large area, B-field tolerant solution for RICH work. Operating in CF4 the PHENIX HBD detector demonstrated the highest measured N0 of any large Cherenkov Detector. However, there are limitations due to the sensitivity range of CsI (110 – 200 nm). Windows for liquid radiator provide higher cutoff. Most (not all) optics for reflection provide higher cutoff. Aerogel opaque in sensitive range.
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Large Area GEM w/ “hidden” Readout EIC requires large area GEM coverage: disks with radii up to ~ 2m Single mask technique, GEM splicing: GEM foils up to 2 m x 0.5 m. Large area coverage requires segmentation with narrow dead areas Optimized for the the large GEM chambers of Super-BigbiteFlexible extensions of readout-board: directly plug in the front end cardReadout cards perpendicular to the active area R&D proposal: build a 1 m x 0.9 m prototype with two segments.
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Strip-pixel R&D Position by charge division (~100 m). Readout count set by occupancy: 2D uses X-Y charge matching allowsup to 10 particles per “patch” 3D uses chg & GEOMETRY matchingrequires R&D to determine limit.STAR FGTCOMPASSPROPOSEDNOTE: Redundancy “hardens” detector against failure.
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Budget Summary The budget consists of a set of so-called “seed grant” projects that are likely interesting to pursue regardless of the findings of our physics/simulations work.23Item k$Fast Drift TPC 40Zig-Zag Readout 26Large Area GEM w/ Hidden Readout 45.6CsI-coated GEMs for PID 50Strip-pixel Readout 39.9TOTAL 201.5
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Summary A Large and growing group of scientists have already begun to work on determining specific and integrated proposals of tracking and PID for the EIC. A list of small seed projects relevant to the later work is included in the letter of intent. The principle deliverable from this work will be a specific research plan within one year’s time leading to a specific and realistic tracking and PID scheme for meeting the physics goals of EIC.24
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BACKUP SLIDES25
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Budget The budget consists of a set of so-called “seed grant” projects that are likely interesting to pursue regardless of the findings of our physics/simulations work.26
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Deep Inelastic Scattering27Measure of resolution powerMeasure of inelasticityMeasure of momentum fraction of struck quarkKinematics:Inclusive events:e+p/A e’+Xdetect only the scattered lepton in the detectorSemi-inclusive events:e+p/A e’+h(p,K,p,jet)+Xdetect the scattered lepton in coincidence with identified hadrons/jets in the detectorwith respect to g Q2 q2 (k k)2Q2 2EeEe(1 cose ')y pqpk1 EeEecos2e2x Q22 pqQ2syHadron :z Eh; pt
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Deep Inelastic Scattering28Measure of resolution powerMeasure of inelasticityMeasure of momentum fraction of struck quarkKinematics:Exclusive events:e+p/A e’+p’/A’+g / J/ψ / r / fdetect all event products in the detectorSpecial sub-event category rapidity gap eventse+p/A e’+g / J/ψ / r / f / jetdon’t detect p’ HERA: 20% non-exclusive event contaminationmissing mass technique as for fixed target does not worke’t(Q2)egL*x+ξ x-ξ H, H, E, E (x,ξ,t)~~gp p’ Q2 q2 (k k)2Q2 2EeEe(1 cose ')y pqpk1 EeEecos2e2xBQ22 pqQ2syt ( p p ')2 , xB2 xB