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Future Scintillator HCAL R&D perspectives Felix Sefkow DESY CALICE collaboration meeting at DESY October Future Scintillator HCAL R&D perspectives Felix Sefkow DESY CALICE collaboration meeting at DESY October 12, 2005 Felix Sefkow October 12, 2005 Calice Meeting

Beyond testbeam • The name “physics prototype” is misleading – it is a testbeam Beyond testbeam • The name “physics prototype” is misleading – it is a testbeam calorimeter and not a technical prototype • Technical solutions scalable to a full detector still need to be developed – – Front end electronics and DAQ Readout boards Calibration system Si. PMs are under rapid development • See Boris’ talk – Consolidate Si. PM scintillator technology, industrialize production, QC • See Misha’s talk Felix Sefkow October 12, 2005 Calice Meeting 2

Front end directions • The fast Si. PM signal can be exploited for auto-triggering; Front end directions • The fast Si. PM signal can be exploited for auto-triggering; Just one example: OPERA ROC – Would decouple shaping and latency – Would allow calibration with r/a sources - or even noise – Could extract timing (1 ns) • Following the ECAL trail: incorporate the ADC in the front end [NIM A 521 (2004), IEEE NSS 03] – G. D. A. S. A. P. – simpler or higher integrated DAQ • Other concepts: e. g. Fast digitization C. De La Taille Felix Sefkow October 12, 2005 Calice Meeting 3

Readout boards • • The micro-coax cable was a conservative extrapolation of the minical Readout boards • • The micro-coax cable was a conservative extrapolation of the minical experience Need thinner structure, amenable to large scale production 1 st step: replace cables by PCB, flex-print, … 2 nd step: integrate the ASICs in the PCB • 3 rd step: develop full electro-mechanical concept including – See – again – the ECAL example – – Signal readout Coupling to Si. PMs (and tiles) Calibration system Cooling Clock+Config+C ontrol VFE ASIC Da ta FE FPGA Conf/ Clock PHY Slab JC Brient Felix Sefkow October 12, 2005 Calice Meeting 4

Calibration system • The present system has belts and suspenders – – Classical LED Calibration system • The present system has belts and suspenders – – Classical LED reference signal (with PIN diode monitoring) Gain calibration with low light intensity Saturation monitoring with large light amplitude Temperature sensors • Testbeam experience will tell how to simplify: – Saturation stable? Less light, fewer fibres! – Gain monitoring sufficient? Drop the PIN diodes! – Auto-trigger? Use alpha source instead of LED! (A. Karakash) • I like the LEDs – I can’t imagine commissioning without… – Use both? Many others do! Felix Sefkow October 12, 2005 Calice Meeting 5

Si. PMs • • Development driven by bigger markets (PET, night vision) First tests Si. PMs • • Development driven by bigger markets (PET, night vision) First tests with Hamamatsu devices reported at LCWS, more details at Beaune conference – Performance similar to MEPHI/PULSAR devices, but better sensitivity to blue light • MEPHI has tested larger area Si. PMs • Large area + blue sensitivity: get rid of the WLS fibre and couple the Si. PM directly to the tile edge Renker – Still somewhat noisy, but a first successful step was made – Big simplification! – Or thinner tiles? (e/pi, total absorption length, coil size = cost) Dolgoishein Felix Sefkow October 12, 2005 Calice Meeting 6

European network for detector R&D • Integrated Infrastructure Initiative within European Union Framework Program European network for detector R&D • Integrated Infrastructure Initiative within European Union Framework Program 6 • Successfully evaluated, negotiations invited • Starts presumably in 2006 • Funding volume: 7 M€ for 4 years Felix Sefkow October 12, 2005 Calice Meeting 7

EUDET Participants: • 25 institutes: from DESY, German U, Poland, France, Spain, Czech, Netherlands, EUDET Participants: • 25 institutes: from DESY, German U, Poland, France, Spain, Czech, Netherlands, Finland, Israel, UK, Sweden, Switzerland Associated: >20 further institutes, e. g. from Russia Coordinating institute DESY I 3 Coordinator: Joachim Mnich Felix Sefkow October 12, 2005 Calice Meeting 8

EUDET Goals, Activities Goals • establish a European network for detector R&D • improve EUDET Goals, Activities Goals • establish a European network for detector R&D • improve infrastructure for detector R&D • provide access to broader community – outside EUDET, outside Europe Joint Research Activities (infrastructure for future R&D) • Testbeam: Magnet 1. 5 T, 86 cm bore, pixel telescope (MAPS) • Tracking: TPC general purpose field cage, Si based endplate, Si tracking facility • Calorimetry: ECAL / HCAL structure improvements, general purpose electronics, forward detector development facilities • Support for common analysis and simulation framework Felix Sefkow October 12, 2005 Calice Meeting 9

Tile HCAL in EUDET • DESY, Hamburg, Prague; LAL and UCL via FEE and Tile HCAL in EUDET • DESY, Hamburg, Prague; LAL and UCL via FEE and DAQ • Mechanical and readout structure, calibration electronics, front end ASICs, DAQ system • Associated (Calice): – UK: ICL, RHUL, UMAN, UCAM – IHEP, ITEP, MEPHI, MSU, Obninsk – N: Bergen • JRA 3 management Christophe De La Taille, FS • EUDET Kick-off meeting next spring, brainstorming before Felix Sefkow October 12, 2005 Calice Meeting 10

HCAL plans • Goal: a realistic – i. e. scalable – prototype by 2009 HCAL plans • Goal: a realistic – i. e. scalable – prototype by 2009 • One sector 1*1*3 m • One column, one row instrumented – e beam only • Open for ideas, suggestions • Await guidance from test beam preparation (absolute priority!) Felix Sefkow October 12, 2005 Calice Meeting 11