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Advanced Calorimetry Performance Goals and Techniques Summary

Explore the latest advancements, performance goals, and techniques in calorimetry including ECal, HCal, digital, analog, simulations, and test beams. Detailed summaries from the LC workshop at Cornell University.

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Advanced Calorimetry Performance Goals and Techniques Summary

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  1. Calorimetry + muon/p-id summary Dhiman Chakraborty Northern Illinois University

  2. Calorimetry • Performance goals • Electromagnetic Calorimetry (ECal) • Hadronic Calorimetry (HCal) • Digital • Analog • Particle-flow algorithms (formerly energy-flow) • Simulations • Particle identification (Digi/Ana) • Test Beam Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  3. Performance goals • Jet energy measurement precise enough to separate Ws and Zs in hadronic decays on an event-by-event basis: ΔE = 0.3 sqrt(E [GeV]) • Use track momenta for charged clusters; cal only for for neutrals: particle-flow algorithms • Identify non-pointing neutral clusters • Excellent hermeticity Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  4. ECal • Si-W (Oregon+SLAC) • Si-W-Scint (Kansas) • Scint-W (Colorado) • Crystal (Iowa+Caltech) • Cerenkov-compensated (Iowa+Fairfield) All analog Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  5. 0.5 cm x 0.5 cm 0.3 mm Si 3.5 mm/layer 30 layers Rin = ~142 cm Zmax = 2.1m 20X0, 0.8λ0 Sampling ~2% 5T field Small Rm and fine segmentation aids PFAs Europe on board Design well under way Electronics rough draft complete Mechanical conceptual design started. Tests, more simulations in the offing Si-W ECal Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  6. More affordable than Si-W Somewhat coarser segmentation – limited by fiber routing Fine sampling and timing Efficiency and uniformity need to be established – gang 3-5 tiles Choice of photodet, fiber coupling … Europe, Asia on board on scint. option Detailed simulation studies in progress Si-W-Scint. & Scint.-W Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  7. Inexpensive Excellent E resol. (100% sampling) No longitudinal segmentation – limitation to PFA? Still in early stage Extensive simulations needed and planned Cerenkov-compensated precision calorimetry Uses Cerenkov light to measure e,γ; ionization for hadrons, e – combine the two Not much known Crystal Cerenkov Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  8. RPC – Digital (ANL, U. Chicago, Boston, FNAL) Scintillator – Digital (?) (NIU, UIC) GEM – Digital (U Texas - Arlington) Scintillator – Analog (Colorado) ~34 layers, ~3.5 cm thick w/ 2.5 cm thick stainless steel or similar absorber ~ 4λ0, ~6% sampling 1-10 cm2 cells HCal Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  9. RPC DHCal • Multiple gas gaps, glass substrate, graphite/ink resistive layer • Avalanche mode operation • Prototypes constructed, electronics, DAQ in place, initial studies are very encouraging • Extensive testing, readout chip design in progress • Backed by detailed simulation Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  10. Scintillator DHCal • Proven technology • Somewhat larger cells • Cheap production by in-house extrusion • MANY options for fiber routing, surface treatment, groove shape, transducer tested with encouraging results • Cosmic ray prototype stack ~ready • Bolstered by extensive simulation Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  11. GEM DHCal • New technology • Double-gap • First prototype w/electronics assembled, operational • Initial tests with CR, source at par with results shown by developers • Multichannel prototypes under construction • Backed up by extensive simulation Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  12. Scint. HCal (analog) • Similar to Scint DHCal, but ~2.5 times larger tiles • Improve lateral resolution by staggering • Cell prototyping done • Stack prototype next • Simulation studies in progress Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  13. Particle-flow algorithms • Several calorimeter groups are deeply involved in simulation and software development as well as PFA development (NIU, ANL, Colorado, UTA, …) • First jet reconstruction results are most encouraging, prompting us to more realistic simulations and sophisticated reco algorithms • Much effort invested Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  14. LC TB Goals and Organization • Detector groups have made significant progress • Individual detector groups have been working on TB efforts independently • ECAL and HCAL testbeam performed already in Europe and Asia • US Calorimeter group leading the effort • Some documents for requirements exist: e.g. Calorimeter group • It is time for more systematic organization for a coherent effort for Test Beam • Better if groups work together for preparing common needs • One communication channel to outside  Provides stronger arguments and accomplish better supports • Provide focus to detector development efforts • Information on available TB facilities compiled • E. Ramberg from FNAL gave detailed status report on MTBF • Need to collaborate with European and Asian colleagues Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  15. H.E.Fisk Summary of TB Needs Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  16. Kick-off LCTB group with the responsibilities • Sets the goals and determines directions for coherent TB preparation for all detector groups • Keep up with progress through regular meetings • Sets priorities if conflict arises • Represents LC TB efforts to outside and facilities • Collaborate with European and Asian TB groups • Discussion session had some 30 members • Set action items for the next few months • Setup communication (mail list, web page and meetings) by Sept., 2003 • Compile a TB requirement document that includes all detector groups, if possible, in all regions, by Jan meeting • Contact the leaders of LCRD and UCLC for separate sections in the upcoming proposals: Sept. 2003 • Complete the list of subgroup reps.: Sept. 2003 Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  17. Subgroups Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  18. Muon & PID Summary R. Wilson – CSU: Particle ID Software Infrastructure • Embedding PID in the overall LCD/JAS s/w infrastructure? • Fast Simulation/Reconstruction : dE/dx tool; code checks; muon fast simulation. • Cross subsystem PID. A. Maciel – NIU: Simulation Software Development • Extension of generalized and universal simulation framework – new worldwide effort. • Planar muon detector example with 45o strips. Big advance! u vs. v for 2 tracks Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  19. Muon & PID Summary (cont.) C. Milstene – NIU: Muon ID Software Development • Resurrection of m code. • Verification of M. Piccolo’s muon ID for single particles and b-b events. G. Fisk – Fermilab: Scintillator Muon Detector Prototype Planes: Description • General description of scintillator strip layout. M. Wayne – UND: Fiber Connections & Routing • Discussion of fiber associated with bringing the WLS light out of the scintillator strips and onto a multi-anode photomultiplier. Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  20. Muon & PID Summary (cont.) P. Karchin – WSU: MAPMT Readout and Calibration Issues • Test results on Hamamatsu M-16 multi-anode PMT. Calibration ideas. R. Wilson – CSU Geiger Photodiode Array Readout Test • Description of tests performed on prototype APD (avalanche photo-diode). M. Piccolo – INFN RPC Prototype Design Issues • First test results for new glass RPCs. • Rate capability studies • Test Beam at Frascati Plateau curve Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

  21. Prototype Module Layout 5.0 m 2.5m 43 full strips 43 short strips 3.6m (L) x 4.1cm (W) x 1cm (T) 3.6m => 0m long Read out: both ends of full strips; one end of short strips (except the shortest 22). 2*(43 + 21) fibers/side =128 channels = 8 (1.2mm dia) fibers/pix * 16(4 x 4mm2) pixels => Equivalent of One MAPMT/prototype plane Cal+mu+p-id+test-beam summary LC workshop, Cornell, 16 July, '03

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