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GLD and related R&D activities in Japan

GLD and related R&D activities in Japan. Akiya Miyamoto KEK 23-Nov-2006 Tsinghua University. Contents. Performance goals of ILC detector GLD concepts and expected performance Detector technology studies Vertex detector TPC Calorimeter DCR. Physics Scenario at ILC.

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GLD and related R&D activities in Japan

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  1. GLD and related R&D activities in Japan Akiya Miyamoto KEK 23-Nov-2006 Tsinghua University

  2. Contents • Performance goals of ILC detector • GLD concepts and expected performance • Detector technology studies • Vertex detector • TPC • Calorimeter • DCR

  3. Physics Scenario at ILC

  4. ILC Detector Performance Goals (http://blueox.uoregon.edu/~lc/randd.pdf) • Vertexing • ~1/5 rbeampipe,~1/30 pixel size (wrt LHC) • Tracking • ~1/6 material, ~1/10 resolution (wrt LHC) • Jet energy (Higgs self-coupling, W/Z sep. in SUSY study) • ~1/2 resolution (wrt LHC) Or better

  5. e+e-gnnWW/nnZZ • Main processes to study if Higgs sector is strongly interacting Distribution: Sum of BreitWigner and Gauss s of Gauss is a/sqrt(E) No. of Events=sxLxBr(W/Zgqq’) M2qq(GeV) M2qq(GeV) Projection to M1=M2 M1qq(GeV) M1qq(GeV) Hard to separate W/Z

  6. e+e-g ZHH at 500 GeV By Yasui • Main channel to study Higgs self-coupling • Total cross section ~ 0.2fb @ 500 GeV • Analysis by TESLA • DIST is used to separate signal from background • Jet energy resolution is crucial to see signal

  7. Higgs study in lepton mode • Higgs mass measurement by Z recoil method • Model independent Higgs search • Dmh~50MeV, Ds/s~3% possible in SM • Mh is very sensitive to loop effect in SUSY models: • Lesser effects of beam related background • Needs excellent tracker performance

  8. GLD Concept • Large ECAL inner radius for optimal PFA,readout by Scintillator + SiPM/MPPC for cost efficiency • Large gaseous main tracker + several layers of IT + VTX • Moderate B Field (3T) Muon Coil HCAL ECAL TPC

  9. LDC GLD SiD Comparison to other concepts TPC CT EM: W/Scintillator 3Tesla Silicon CT EM: W/Si 5Tesla TPC CT EM: W/Si 4Tesla GLD: Large ECAL radius  good for better jet energy resolution

  10. GLD GLD features 1. Moderate B field (3T), All detector except Muon, inside a coil 2. Large inner radius of ECAL(~2m) to optimize for PFA. Absorber: W(ECAL), Iron (HCAL) Fine-segmented scintillator read out by MPPC 3. Gaseous tracker: TPC with MPGD readout Excellent Dpt/pt2 and pattern recoginition Vertex and Intermediate Tracker TPC coil

  11. GLD organization Member :16 countries, 77 Univ./Inst. 224 members # inst. UK 5 Germany 3 Italy 2 Netherlands 1 Rusia 1 Japan 28 Philipine 2 Korea 8 Australia 2 China 5 India 4 Singapole 1 Vietnum 1 USA 11 Canada 1 • GLD Concepts has been developed through E-mails and TV meetings discussionhttp://ilcphys.kek.jp/gld lcddds@ilcphys.kek.jp • GLD DOD: physics/0607154 • Task forces (since March 2006) • IR (T.Tauchi ) • PFA (T.Yoshioka) • Tracking ( to be decided) • ILC crossing angle, Detector hall, push/pull options, etc are hot topics in recent meetings Contact Persons H.Yamamoto, H.B.Park (Asia), G.Wilson(NA) R.Settles, M.Thomson(EU) Executive board S.Yamashita - Benchmark A.Miyamoto - Software Y.Sugimoto - Vertex Detector H.J.Kim - Intermediate Tracker A.Sugiyama/R.Settles – TPC T.Takeshita - Calorimeter/Muon T.Tauchi - Interaction Region H.Yamaoka - Coil & Structure P.Ledu - DAQ M.Tomson - Space

  12. Geant4 simulation of GLD • Geometry implemented in Jupiter 1 module • ECAL: 33 layers of 3mmt W/2mmt Scint./1mmt Gap • HCAL: 46 layers of • 20mmt Fe/5mmt Scint./1mmt Gap • CAL readout cell • 2cmx2cm (Default) • 1cmx1cm ( studied in parallel ) • Strip shape: 1cmx5cm 10cm air gap as a readout space

  13. Typical Event Display • ZH → nnh : Two jets from Higgs can be seen.

  14. Tracking • Momentum resolution: based on cheated PFA ( GLD DOD ) Track finders are yet to be developed !

  15. A typical CAL. performance by Y.Kawakami and H.Ono K0L Gamma Energy Resolution(DE/E) Performances have to verified/confirmed by beam tests in coming years

  16. e- e+ Realistic PFA • Critical part to complete detector design • Large R & medium granularity vs small R & fine granularity • Large R & medium B vs small R & high B • Importance of HD Cal resolution vs granuality • … • Algorithm developed in GLD: Consists of several steps • Small-clustering • Gamma Finding • Cluster-track matching • Neutral hadron clustering Red : pion Yellow :gamma Blue : neutron

  17. Jet Energy Resolution (Z-pole) - Z → uds @ 91.2GeV, tile calorimeter, 2cm x 2cm tile size All angle • Performance in the EndCap region is remarkably improved recently. • Almost no angular dependence : 31%/√E for |cosq|<0.9. T.Yoshioka (Tokyo)

  18. Jet Energy Resolution - Energy dependence of jet energy resolution. Next step is  Optimization of detector configuration  Using physics process, such as ZH, TT, etc, - Jet energy resolution linearly degrades. (Fitting region : |cosq|<0.9) T.Yoshioka (Tokyo)

  19. Concepts - Technologies

  20. JSPS Creative Scientific Research Research and Development of a Novel Detector System for the International Linear Collider • Just started (2006) 400M\ in 5 years + 6 Post.Doc. Positions • Research Items: • Develop key technologies for the ILC detectors • Detector optimization and develop GRID as an ILC computing infra. Coordinated by : Hitoshi Yamamoto (Tohoku Univ.) http://www.awa.tohoku.ac.jp/ilcsousei/indexe.html Optimization GRID Tracker Calorimeter Vertex Detection MPPC FPCCD MPGD Develop state-of-the-art new sensors

  21. VTX R&D in Japan • Challenge of ILC Vertex detector • To achieve performance goal, vertex detector has to • Thin(< 100mmt si/layer) pixel device, spt < 5mm, # layer > 3 • Bunch spacing, ~300nsec, is too short to readout O(1) Giga pixels,but occupancy is too high if accumulate 3000 bunches of data with a standard pixel size of ~ 20x20mm2. • No proven technology exist yet. Candidates are, • Readout during train • CPCCD, MAPS, DEPFET, … • Local signal storage, and readout between train • ISIS, CAP, FAPS, … • Fine Pixel, readout between train • FPCCD (5x5mm2 pixel CCD) • In Japan, we (KEK-Tohoku-Niigata collaboration) are proposing Vertex Detector using Fine Pixel CCD (FPCCD) • We believe FPCCD is the most feasible option among the proposed technologies

  22. FPCCD Vertex Detector • 2 layers  Super Layer, 3 super layers in totalminimize the wrong-tracking probability due to multiple scattering • 6 layers for self-tracking capability • Cluster shape analysis can help background rejection • Baseline design for GLD Low Pt High Pt • 1/10~1/20 noise hits reduction expected from simulation

  23. FPCCD Chip • 5mm pixels, to reduce occupancy • Promising, because Fine pixel CCD device exists already for optical applications • Fully depleted epitaxial layer to suppress charge spread by diffusion • Multi-port readout with moderate (~ 15MHz) readout • Low temperature operation to keep dark current negligible for 200msec readout cycle.

  24. . . . . . . . . . E Bz Challenge of TPC technology • Principle of TPC • Challenges • To achievesrf<150mm after long drift of > 2m MWPC (large ExB not good) MPGD readout • R&D issues • Gas amplification in MPGD : GEM, MicroMegas • Properties of chamber gas:drift velocity, diffusion • Ion feedback control Central Membrane Pad Plane Drift Time  Z position Position at Pad plane  rf position

  25. KEK PI2 beamline Beam Saga-Hiroshima-Kinki-Kougakuin-TUAT-KEK +MSUIIT+MPI+CEA/CNRS+Carleton

  26. 0T 1T Beam test result: example • Better understanding of resoltion vs drift length, B field, pad size, GEM/Micromegas, etc. obtained. Plan of coming years  Studies of MPGD, Gas properties, etc by Large Prototype together with LCTPC

  27. Calorimeter Kobe-Shinshu-Niigata-Tsukuba-Tokyo • Finely segmented sandwich calorimeter • Active material: Scintillator • Huge number of channel: • EM-CAL(10M), HD-CAL(6M) • Sensor inside 3T magnet • Photon sensor: Multi-Pixel Photon Counter • Under development by Hamamatsu Photonics and many other companies. • High Gain (~106), High Efficient(~60%)Low operating voltage(~60V), Good even in 5 Tesla, will be cheap. • Limited dynamic range, noise ? • CAL. With MPPC readout will be tested soon at DESY/FNAL

  28. Front View of sensor 4 mm O(1k) pixels, Each pixel is inGeiger mode. # hit pixel = # input lights 3 mm ~1.3mmt Photon Sensor R&D • Merits of Silicon Photon Pixel Counter • Work in Magnetic Field • Very compact and can directly mount on the fiber • High gain (~106) with a low bias voltage (25~80V) • Photon counting capability

  29. Detector DCR • Companion document to GDE’s Reference Design Report (RDR) which outlines baseline and costs for the ILC machine. • DCR has three pieces: Physics (50p)+Detector(150p)+Executive Summary • DODs (Detector Outline Documents) provide much of the material for the Detector DCR • WWS-OC oversees writing the DCR Overall Editorial Board Brau, Richard, Yamamoto Physics Case for ILC Editors J. Lykken, M. Oreglia, K. Moenig, A. Djouadi, S. Yamashita, Y. Okada ILC Detectors and Costs Editors A. Miyamoto, T. Behnke, J. Jaros, C. Damerell

  30. More about DCR • The RDR and DCR are due at the end of 2006 • The DCR must make a compelling case for ILC physics and detectors • The Detector DCR willmake the case that detectors can do the ILC physics show that detector designs are within reach note that advances in detector technology are needed show the progress on detector R&D ballpark detector cost argue for 2 detectors • Spirit of the DCRcooperative among concepts, not a vs b vs c vs d vs… supported by the international ILC detector community

  31. The Outline of the DCR • General Introduction • Challenges for Detector Design and Technology • Introduction to the Detector Concepts • MDI Issues • Subsystem Designs and Technologies • Sub-Detector Performance • Integrated Physics Performance • Why We need 2 Detectors • Detector Costs • Future Options • Next Step • Conclusion

  32. Detector DCR Wiki Rough Drafts Available Now!(thanks Ties) Caveat: Drafts are evolvingrapidly. It’s too early for comments. http://www.linearcollider.org/wiki/doku.php?id=dcrdet:dcrdet_home J.Jaros, Valencia 2006

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