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Detector R&D at NIKHEF SAC meeting, 20 April 2007 Jan Timmermans

Detector R&D at NIKHEF SAC meeting, 20 April 2007 Jan Timmermans. Pixel readout of gas detectors: Gridpix, Timepix, … Medipix, RELAXd 100 m RASNIK alignment. Micro Patterned Gaseous Detectors. GEM. High field created by Gas Gain Grids Most popular: GEM & Micromegas. Micromegas.

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Detector R&D at NIKHEF SAC meeting, 20 April 2007 Jan Timmermans

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  1. Detector R&D at NIKHEFSAC meeting, 20 April 2007Jan Timmermans • Pixel readout of gas detectors: Gridpix, Timepix, … • Medipix, RELAXd • 100 m RASNIK alignment

  2. Micro Patterned Gaseous Detectors GEM • High field created by Gas Gain Grids • Most popular: GEM & Micromegas Micromegas Use ‘naked’ CMOS pixel readout chip as anode

  3. Results pixel readout gas detectors NIKHEF-Saclay-CERN-Twente 55x55 μm2 pixels δ ray Observation of min. ionising cosmic muons: high spatial resolution + individual cluster counting ! NIM A540 (2005) 295 (physics/0409048)

  4. TimePix(EUDET: Bonn,Freiburg, Saclay, CERN, NIKHEF) • Distribute clock to full 256x256 pixel matrix • (50-100-160MHz) • Enable counting by first hit after ‘shutter’ opens, until ‘shutter’ closes (common stop); also time-over-threshold possible • Dynamic range 214 x 10 ns = 160 μs • (for the time being) no zero-suppress • to remain fullycompatible with Medipix2 • Shaping time ~200 ns • Keep same chip-size, pixel-size, readout • protocol • 1st full reticle submit done July 2006; • IT WORKS!

  5. First tracks with TimePix+SiProt+Micromegas: cosmics + α particle V_grid= -400 V; gain ~5000 He/Isobutane 80/20 Acquisition (‘shutter’) time ~ 1sec Time_over_threshold mode  pulseheight

  6. And triggered cosmics (sum of several triggers) Shutter time = 15 μs Blue = late Red = early TimePix chip stayed alive for 40 days with He/isobutane 80/20 And ‘died’ on 26/1/07 after 1.5 day with Ar/isobutane 80/20

  7. First INGRID tests • Post-processing of a 4” wafer successful! • SiProt covered • InGrid • Diced to individual chips • Handling critical • SU8 photo-resist dike around the pixel matrix • Perfect alignment pads/holes • Pillars in between pads

  8. 2 chips tested in He 20% iC4H10 • 55Fe signals at Vgrid = -280 V i.e. G ~ 200 • Almost full homogeneous response • Still short lifetime (sparks even at low gains) Moire effects with Micromegas InGrid covered Medipix Micromegas covered Timepix

  9. TwinGrid Alternative:

  10. Literature Cluster density Kr/DME 74/26: 40.2 cm-1 GOSSIP: 1.2 mm thin gas detector + Micromegas • Gas: Kr/DME 74/26 • Measured histogram with fitted convoluted Poisson • Cluster density calculated from two independent methods • Magnitude pedestal peak • 2.55 +/- 0.07 % pedestal events • => cluster density 39.1+/-0.8 cm-1 • Fitting convoluted Poisson to experimental data • Using pdf =1 the best fit occurs at 38.2 +/- 2.6 cm-1¥ ¥Note that this number depends on the pdf value

  11. GOSSIPO-2 chip: • CMOS 130nm technology • Multi-project wafer run (design ready Nov. 2006) • 16 x 16 pixels • Each pixel: preamp, shaper, discriminator + 700 MHz clock (active for short interpolating period) • Waiting for the run to take place

  12. Medipix and RELAXd 18 April 2007 - Jan Visschers

  13. Medipix Collaboration • Univ + INFN Cagliari • CEA-LIST Saclay • - CERN Genève • Univ d'Auvergne • - Univ Erlangen • - ESRF Grenoble • - Univ Freiburg • - Univ Glasgow • - IFAE Barcelona • - Mitthoegskolan Sundsvall • - MRC-LMB Cambridge • - Univ + INFN Napoli • - NIKHEF Amsterdam • - Univ + INFN Pisa • - FZU CAS Prague • IEAP CTU Prague • SSL Berkeley Spokespersons: Michael CAMPBELL CERN Jan VISSCHERS NIKHEF

  14. Quad Medipix 1sensor on 4 Medipix chips 6-layer ultra-fine line design Laser-drilled micro-via’s Kapton Buildup technology 0.25 Megapixels

  15. RELAXd: Tile-able Microsystems Medipix 2.1ROIC • Edgeless Planar Silicon Sensors • Through-CMOS contacting • High-bandwidth readout Eureka Project 2. IMEC 3. NIKHEF 1. Canberra 4. PANalytical (application)

  16. Raw image of 90Sr source with current Quad carrier.

  17. Through-CMOS connections • Through-silicon interconnect • Medipix wafer thinning: 100 um • Ball-Grid Array on the back side of the Medipix chip • Balls 500 um diameter, 800 um pitch Quad sensor Medipix ASIC Medipix ASIC Multi-layered chip carrier board

  18. Frame and Cooling Large area (9x9 cm2) < 100 Watts total power Ceramics Frame Cooling pipes through frame Power through frame

  19. Roadmap Frame, Power, Cooling (2009) Through-via carrier Zdenek Vykydal Current Quad RELAXD module (end 2007) John Hug Multi-Gbps carrier Bas van der Heijden

  20. 100m RASNIK alignment Harry van der Graaf

  21. Principle of CCD-RASNIK (as used for muon chamber alignment in L3) Light Source Lens CCD Coded Mask 8000 systems installed in ATLAS

  22. 100 m RASNIK for CLIC CLIC Accelerator length: 2 x 15 km Number of elements: 15.000 Number of ‘4 m’ RASNIKs: 15.000/30.000 Number of ‘100 m’ RASNIKs: 600 RasCam Laser zone lens hole dia. 50 mm 100 m (vacuum tube!)

  23. Image position on sensor. Response of earthquake in Mid-Atlantic, 5 Richter Scale, on March 1, 2007

  24. Tidal movement: crust deformation due to angular position of Sun and Moon, measured with RasClic, CERN, Geneva (filtered raw data)

  25. The ‘Earth Hum’, measured after the ‘tsunami’ earthquake, Xmas 2004 [Park et al]

  26. ‘Hum’ modes (Direct) Fourier coverted raw X-data of RasClic, Feb 2007 New wide-band seismometer?

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