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ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE1 The Tile-HCAL, studies and time plans, V. Korbel, DESY, 30m The last meetings since ECFA-DESY workshop.

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Presentation on theme: "ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE1 The Tile-HCAL, studies and time plans, V. Korbel, DESY, 30m The last meetings since ECFA-DESY workshop."— Presentation transcript:

1 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE1 The Tile-HCAL, studies and time plans, V. Korbel, DESY, 30m The last meetings since ECFA-DESY workshop in Prague (Nov. 2002) actual status of R&D: –scintillators –WLS-fibres, clear fibres, fibre coupling –optimisation of tile-fibre system (TFS) –photodetectors –preamps measurements with the minical –readout and DAQ –cosmics, –noise and pedestals –LED-calibration –plans for e-beam test at DESY (summer 2003) status of preparations for the 1m 3 prototype for E-flow beam tests –photodetectors –preamps –VFE RO boards

2 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE2 The last Tile-HCAL meetings Since the Prague ECFA-DESY workshop: main meetings: , , LAL-Orsay, preamps for APDs, dela Taille, Cvach,... Dec CERN, VFE for APDs with DUBNA, I. Golutvin, I. Tiapkin, F. Sefkow, Dec DUBNA, VFE, I. Golutvin, I. Tiapkin, Y. Gilitski, Minsk people,.... Febr ITEP and MEPHI, Moscow, B. Dolgoshein, V. Rusinov,..... Febr LAL-Orsay, VFE for APDs, dela Taille, I. Tiapkin, F. Sefkow,... Febr ???? future main meetings: , ??? To be fixed these days Documentation: 1. tasks, institutes, people, time plans, meetings, talks and minutes in Web: >>>http://www.desy.de/~korbel/see/tilehacal/ detailed Tile-HCAL R&D report, Oct. 2002, available: The Tile-HCAL Calorimeter for the TESLA Detector, a Status Report on the R&D-Studies 3. new web-page with better guidance is prepared, open next week!

3 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE3 Presentations for the Tile-HCAL on this workshop CALICE collaboration meeting (Monday, ,NIKHEF): V. Korbel, Introduction to CALICE Tile-HCAL meeting: Status of the R&D, 15 M. Danilov for ITEP, R&D in Russia, 20 B. Dolgoshein for MEPHI, News from the Si-PMs as Photodetetctors for the Tile-HCAL, 20 S. Nemecek for Prague, APDs for the HCAL, gain stability V. Korbel for DESY, LPI Tests with the minical, plans for prototype, time scale DAQ and Trigger meeting: V. Korbel, DAQ concepts for the minical and Tile-HCAL prototype, 10 P. Daucey, CALICE beam test DAQ Calorimeter Session, Hadronic Calorimeter V. Korbel, The Tile-HCAL, studies and time plans V. Morgunov for DESY, ITEP, Prototype Tile-HCAL Simulation with Si-PMs as Photodetectors P. Dauncey, DAQ for the CALICE beam test

4 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE4 The plastic scintillators for the tiles The different scintillators studied: PVT: -BC-408, BC-404,..... PS: SCSN-81, Kuraray new R&D scintillators from Kuraray: ITEP/Vladimir: BASF-143, others Protvino/LPI SC-306M, SC Charkov The PS scintillators based on PS show ~ LY of PVT but ~ 5 x cheaper possibility to cast them in tiles (with grooves) >>> made studies on LY and uniformity, ok? >>> decision to select producer M.Danilov,CALICE main recent measurements in ITEP

5 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE5 Details of TFS Optimisation Studies Centre/straight WLS-fibreDiagonal/bent WLS-fibre No stress on fibre, fibre refl. =tile reflector Double looped fibre strong fibre bend, most stress on fibre, probably ageing damages, fibre end fibre reflector inside tile >>> special reflective coating needed ? L=7,85cm L=5cm L=31,4cm 1.1 mm hole in center drilled and polished? could it be made during tile moulding? more stress on fibre, fibre refl. =tile reflector clear RO fibre to couple: 1-3.5m in detector, light attenuation <18% L=7.85cm

6 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE6 The WLS-fibres 1 mm diameter, double clad, BC-91A BC-92 BC-Dayglo, red range extended Kuraray, Y-11( ppm) WLS shifting component polishing of fibre end fibre end reflector attenuation length conversion efficiency stability against bends, loops (2.4 mm radius) ageing agains bend stress, in radiation field >>>> Y-11(300) for short fibres Y-11(500) for long fibres material available for all minical channels University Friedberg/Giessen

7 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE7 The coupling of WLS-fibres to scintillator, similar to BC-408, 404 Have selected Kuraray Y11(300)

8 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE8 TFS LY measurements at ITEP M.Danilov,CALICE main

9 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE9 The actual achieved LY for the TFS, Kuraray, WLS-fibre 3M-Super Radiant Reflector Scintillator BC-408, All together: 100% reflectivity at fibre end Treatment direction 22+/-1.5 pe (BC-408, Aug. 2002) >> 26 (new results from ITEP) both Russian scintillators have ~ 2/3 of BC-408 LY ~20% more LY can be expected by improving polishing of WLF-fibre end, no gluing needed anymore Light yield/tile/MA-PM

10 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE10 Photocathode sensitivity of APD WLS-fibre, Kuraray clear-fibres, Bicron and Kuraray attenuation in clear RO-fibres minimal: BC-98: 0,65 db/m ~ 40% for 5m fibre no damage observed for bent fibres (d=5 cm) no ageing during 1 day observed >>> Y11(300), on tile + BC-98 RO-fibre Light attenuation measurement in RO-fibres 10,20,50 and100 cm (ITEP)

11 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE11 WLS fibre-clear fibre connection WLS-fibre >>clear fibre: standard is gluing with optical glue better procedure: thermo-fusing, ~ o C, heating by 1-2 windings of resistive wire fibres cut, adjusted and pushed together in glass tube of 1.10 mm inner hole diameter few A current for a few sec. >> connection difficult to find by eye no light loss seen at connection first results: 84% transmission improvement potential still available in the fusing procedure Well established procedure at FNAL for CDF calorimeter, 90% transmission >>production parameters can be optimised Pressure, temperature, time guide tube diameter ?

12 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE12 The remaining candidate photodetectors: APDs: S spl, 3x3mm 2, S8550, 32 pixels of 1.6x1.6mm 2 at test in Prague Si-PMs (MEPhI): gain ~2*10 6 photocathode eff. ~ 15-20% sizes: 1x1mm 2, 576 and 1000 pixels/mm Photodetectors needed (APDs) with 3-7 tiles combined to calo cells or Si-PMs of 1x1mm 2 needed alternatively -decision to use both detectors in prototype Photodetectors

13 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE13 APDs Hamamatsu, 3x3mm APD, S spl package is same as S (5x5 mm APD)'s with resin coating. Delivery time takes 1.5 months for 30 pcs typical performance: gain= >1000 possible Id 600pA 1.2nA C 28pF 28pF have 6 APDs for tests 170 Euro per piece, for Euro per piece, for Euro per piece, for Euro ? for > APDs? C GAIN M Id 500 V Future plan (Hamamatsu) : APD Array : try to make low capacity type, proceed with "3 x 3 mm, 4 x 4 ch APD-array". target characteristic is as follows. C : 15 pF Variation of gain : +/- 20 to 30 %

14 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE14 2 ns 2 mV Some features: Sensitive size 1x1mm 2 on 1.5x1.5 mm 2 Gain at U bias ~ 50V Recovery time ~ 100 ns/pixel Nuclear counter effect: negligible (due to Geiger mode operation) Number of pixels: 576, now 1000/mm 2 Dynamic range > 200 R&D at MEPHI (Moscow), B. Dolgoshein, together with PULSAR (Russ. Industry) SiPMs, Silicon Photomultiplier For further details see: «Advanced study of SiPM»

15 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE15 Performance of SiPMs with 1 scint.Tile DESY e-test beam with various Si-PMs (MEPHI) 4-8 pe 576 px 53-55V 15 pe 1000 px Si-PM on tile 10 pe, 576 px 54V minical

16 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE16 Si-PMs, dark rate and MIP detection Sum of 3 tiles, e-beam test DESY 576pix/mm2 From Elena Popova, MEPhI

17 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE17 Minical array Assembled with up to 27 scintillator layers, of 9 tiles each, 5x5X0.5 cm scintillator tiles or 81 cells of 3 tiles read out by ~ 50 cm WLS fibres to photo-detectors: APDs: 3 tiles/APD MA-PMs: 16fold, 3 tiles/pixel Si-PMs: 1 tile/Si-PM also:1x32 M-APD array (Pra Stack and Tile structure Aim of this device is: cosmics, study of: LY uniformity of response calibration with MIPs stability of MIP signals different photodetectors long term ageing LED monitoring: stability dynamic range e-beam, study of: energy resolution constant term

18 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE18 Minical, pictures

19 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE19 Minical, pictures

20 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE20 Where are we? Status now, for minical tests: WLS-fibres ordered and delivered, 500m(Y11-300) and 100m(Y11-500) 3M super-reflector foil available minical now modified by Prague group: 9 mm gaps, larger housing, windows for feed-through, light tight, easier access to interior 6 new Hamamatsu APDs (3x3 mm 2, 190 Euro/piece) now at DESY to be inserted in minical for MIP tests, yield next 3 weeks ? Si-PM production/delivery schedule (see Boris talk) next 30 available, than 100 up to June, 1000 pixels/mm 2 TFS geometry, reduce variety soon, up to end April design/build cassettes, for 9 tiles, 9 mm tick, 27 pieces for July tests preamps to design/order >> LAL Orsay: , delivery R&D for Minsk/Gilitski, Prague, DESY/Smirnov types goes on APDs and Si-PMs to order >> 30 APDs and ~100 Si-PMs (with 1000pixels) HV distribution to design/order/build: V, APD, 30 channels and V, Si-PM, 100 channels

21 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE21 minical-tasks, TFS production details The TFS for the minical: --81 tiles with Si-PMs, short WLS-fibres, SI-PM inserted, from Vladimir/ITEP --81 tiles from Protvino, with cylindrical holes??, cast in moulds, together with the tiles or drilled, to insert the WLS-fibres --81 tiles from BC-408, cut and polished at DESY, with a) WLS-fibres in cylindrical, drilled central holes, 50 cm more fibre to APDs b) WLS fibres in curved diagonal grooves, also 50cm to APDs Hope to have a technology to replace the WLS-fibre outside the tiles by fused clear fibres, who does it? Can ITEP prepare also the 81 Protvino tiles? >>I.e. make grooves or holes, insert fibres, wrap tiles, test in black box? A special >5 cm long drill of 1.1 mm diameter is in preparation at DESY. We need to group tiles with equal (+/-5%) LY, 3 tiles of same response to one APD. Thus LY of all 81 TFS to be measured with a source. To do at DESY with help of Protvino/LPI people. Our Time scheme: Production of tiles in April/mid May Machining/Wrapping in May/ mid June Tests and selection in June/mid July Delivery to DESY mid July Start insertion in minical last 2 weeks in July Cosmic calibration tests 2 first weeks in August We need more participating physicists during minical set-up and tests.

22 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE22 Support frames for TFS MEPhI, ITEP For APDsFor SI-PMs

23 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE23 Direct TFS readout with SiPM M.Danilov,CALICE main in minical at DESY

24 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE24 Shower containment in minical, DESY e-beam 1 section, 9 layers, 81 cells MIP peak used for calibration Shower leakage to correct with the middle section of minical Studies by V. Andreev >>>

25 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE25 Energy resolution in minical, DESY e-beam /E=a/sqrt(E) (+) c Aim is to study: the effects contributing to the constant term: LY fluctuations within tiles lat. non-uniformity of response MIP calibration precision stabilty of calibration noise dead gaps between tiles leakage

26 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE26 Energy resolution in minical, Si-PM, 576 pixels Saturation curve: number of fired pixels vs number of photons x photo-conversion efficiency /E=a/sqrt(E) (+) c

27 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE27 BC-408 scintillator single tile, diagonal bend groove, cosmic -peak, 60 cm WLS fibre RO MA-PM 23,1-26,2 pe Noise, randoms cosmics LED-pulses Calibrating the minical cells

28 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE28 BC-408 scintillator single tile, diagonal bend groove, cosmic -peak, 60 cm WLS fibre RO to MA-PM 23,1-26,2 pe Random and pedestal subtracted cosmic -peak spectra of some PS-scintillators from Protvino/LPI pe Calibrating minical cells, studying LY

29 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE29 Remote web access to the measurements Install in minical: different scintillators fibres photodetectors pre-amps supply voltages trigger conditions Look for: gain stability signal width signal noise separation calibration with MIPs run parameter file LED monitoring Study the results of up to 64 channels with MIPs ITEP LPI MEPHI Prague Protvino DESY.... At DESY: via web: +sw-tools: F. Krivan V. Dodolov A.Terkulov S. Karakash Start run with new components or new settings all 24 hours. very similar situation later during prototype running in beam test at other laboratories

30 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE30 HCAL prototype for E-flow studies Required volume ~ 1 m 3 ~ calorimeter cells Fe-structure can accept analogue or digital HCAL?? 10 GeV pions 100 GeV pions 100 cm Leakage detector needed!

31 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE31 The Prototype stack Design/Construction Studies: TDR LC-notes K. Gadow, VK DESY, Jan Need now to come to decisions how to build? Steel, ss? 2 half modules (magn.field?) Where?

32 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE32 more on tile sizes and total numbers 38 layers require ~ 5000 tiles with 38 different tile sizes casting with minimum number of moulds! Need to fix tile sizes soon!

33 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE33 Prototype channels

34 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE34 The fraction of prototype cells fired Simulation studies for single pions: beam energies: 10, 40, 100 GeV RO threshold cuts: 0, 0.25, 0.5 MIP standard granularity: 5x5cm 2, 3 cells deep(3/9) 6x6cm 2, 3 cells deep(4/12) 8x8cm 2, 2 cells deep(2/10) 12x12cm 2, 1 cell deep (1/7) 969 cells in total By V. Andreev

35 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE35 Energy sharing between ECAL and HCAL-PT The following studies from V. Andreev: ECAL and TC have effect on energy resolution ~ 45-55% of events depose more than 2 GeV in ECAL

36 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE36 Prototype TC for energy resolution

37 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE37 The contribution of the TC to the energy measurement E(ECAL) +E(HCAL) E(TC)/(E(ECAL) +E(HCAL)) E pion =5,10,20,30,50 GeV

38 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE38 The VFE-ROB-scheme, APDs Array of single APDs or matrices pulse shapers Sample & hold Multi plexer (analog) Trigger/ RO clock LED signals PIN diode for LED monitoring HV, V dV/V~10 -4 charge sensitive preamps pedestals Online/Offline Gain/HV monitoring? cosmic beam Charge injection DAC DAC-signals

39 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE39 1. Pre-selection of appropriate photodetectors available: APDs(~6) and Si-PMs(~10) ordering larger quantities for more tests in minical (March). Need 30 APDs and 162 Si-PMs in total, Si-PMs (1000 pixels!) 2. studies and development of integrated preamplifier/shaper circuits, and MEPhI Si-PM with FE preamps.up to end April. Operation in Minical. 3. For minical: decide on the optimal APD-preamp type, end March: ---study Minsk and Prague preamps with APDs in minical, --- important: get noise contribution to MIP-peak (noise vs MIP efficiency) ---order/loan ~2 prototype CALICE-ECAL PCI preamp boards (which should later integrate the photodetector connections) 4. Concept/design final preamp prototype boards for the 1000 channel test prototype,....all and DUBNA?, (April) 5. design prototype boards for all APD and Si-PM channels, DUBNA?,(May) 6. Up to May to decide, which photodetectors in which quantity to use: 1000 APDs or ~ 5000 Si-PMs, or both types in relevant quantities e.g. 200/ order of all photodetectors for the Tile-HCAL prototype, June 8. Decide/order HV power supply/ distribution, June Time Planing, , I

40 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE40 Time Planing,II 9. Need Russian scintillators for tests in minical, (~20 each, March) 10. ordering Bicron BC-408 for the larger tile sizes, ~8 m 2, up to Summer 11. define optimal cell and tile sizes, from software and hardware studies, decision up to end of April 12. Prepare 300 tile minical test at DESY, (100/100/100) May 13. design of the prototype stack, April/May 14. a detailed tile-plate assembly concept has to be defined, July 15. Minical test at DESY, with final photodetector types, July-September 16. building of stack steel absorber structure, in ITEP or Prague? >August 17. casting/machining of ~3700 tiles up to September, (in factory ? or machining at DESY, or elsewhere?) 18. assembly of the TFS in tile plates (detector cassettes), November 19. TFS connection with photodet. and preamps, start November-December 20. RO via CAMAC as long as British DAQ not available, end winter 2003/2004 operation studies with LED gain monitoring, and calibration studies with cosmic muons, with increasing number of calorimeter cells as assembled.

41 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE41 1. Enough LY from TFS (~200 photons at photodetector) 2. APDs and SI-PMs are the photodetectors which do the task 3. Preamplifiers with low noise are essential (MIP-noise separation,calibration) 4. Minical test to establish calibration precision in summer 5. Now design of prototype boards for APD and Si-PMs, DUBNA 6. Photodetectors, large quantity to order in summer: 1000 APDs or ~ 5000 Si-PMs or both types in relevant quantities e.g. ~250/ Prototype stack (1m 3 ) will be build in summer 8. Assembly of PT-stack with TFS starts in Jan Spring 2004 is used to set up and calibrate all channels with cosmics. Outlook

42 ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE42


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