Detector R&D at NIKHEF SAC meeting, 20 April 2007 Jan Timmermans Pixel readout of gas detectors:...
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Transcript of Detector R&D at NIKHEF SAC meeting, 20 April 2007 Jan Timmermans Pixel readout of gas detectors:...
![Page 1: 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.](https://reader035.fdocuments.us/reader035/viewer/2022070415/56649e8e5503460f94b91b21/html5/thumbnails/1.jpg)
Detector R&D at NIKHEFSAC meeting, 20 April 2007
Jan Timmermans
• Pixel readout of gas detectors: Gridpix, Timepix, …
• Medipix, RELAXd• 100 m RASNIK alignment
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Micro Patterned Gaseous Detectors
GEM
Micromegas
• High field created by Gas Gain Grids
• Most popular: GEM & Micromegas
Use ‘naked’ CMOS pixel readout chip as anode
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Results pixel readout gas detectors
Observation of min. ionising cosmic muons: high spatial resolution + individual cluster counting !
δ ray
NIKHEF-Saclay-CERN-Twente
NIM A540 (2005) 295 (physics/0409048)
55x55 μm2 pixels
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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 fully compatible with Medipix2
•Shaping time ~200 ns
•Keep same chip-size, pixel-size, readout protocol
•1st full reticle submit done July 2006; IT WORKS!
11 22 44
55
66
55μm
55μm
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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
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And triggered cosmics (sum of several triggers)
Shutter time = 15 μs
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
Blue = late
Red = early
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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
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• 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)
Micromegas covered Timepix
InGrid covered Medipix
Moire effects with Micromegas
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TwinGridAlternative:
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Fred Hartjes 10
NIKHEF detector R&D meeting. January 23, 2007
MIP response for Gossip 21
charge signal (ke-)
0 10 20 30 40 50
# of
eve
nts
0
100
200
300
400
500
Measured histogramFitted convoluted PoissonAssumed pedestal peak
Vmesh = - 600 V
Vcath = -1000 V
Drift gap 1.2 mm=> Edrift = 3.3 kV/cm
pad pattern on glassBrass Micromegasgas: Kr/DME 74/26Exitation by mips from 90Sr source2.55% pedestal events14-2-2007
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
1. Magnitude pedestal peak 2.55 +/- 0.07 % pedestal events
=> cluster density 39.1+/-0.8 cm-1
2. 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
LiteratureCluster density Kr/DME 74/26: 40.2 cm-1
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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
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Medipix and RELAXd
18 April 2007 - Jan Visschers
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Medipix Collaboration
- Univ + INFN CagliariUniv + INFN Cagliari
- CEA-LIST SaclayCEA-LIST Saclay
- CERN Genève- CERN Genève- Univ d'Auvergne Univ d'Auvergne
- Univ Erlangen- Univ Erlangen
- ESRF Grenoble- ESRF Grenoble
- Univ Freiburg- Univ Freiburg
- Univ Glasgow- Univ Glasgow
- IFAE Barcelona- IFAE Barcelona
- Mitthoegskolan - Mitthoegskolan
Sundsvall Sundsvall
- MRC-LMB Cambridge - MRC-LMB Cambridge
- Univ + INFN Napoli- Univ + INFN Napoli
- - NIKHEF AmsterdamNIKHEF Amsterdam
- Univ + INFN Pisa- Univ + INFN Pisa
- FZU CAS Prague - FZU CAS Prague - IEAP CTU Prague IEAP CTU Prague - SSL Berkeley SSL Berkeley
Spokespersons: Spokespersons: Michael CAMPBELL CERNMichael CAMPBELL CERNJan VISSCHERS NIKHEFJan VISSCHERS NIKHEF
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Quad Medipix
1sensor on 4 Medipix chips6-layer ultra-fine line designLaser-drilled micro-via’sKapton Buildup technology0.25 Megapixels
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RELAXd: Tile-able Microsystems
1. Edgeless Planar Silicon Sensors
2. Through-CMOS contacting
3. High-bandwidth readout
Medipix 2.1 ROIC
1. Canberra
2. IMEC
3. NIKHEF4. PANalytical (application)
Eureka Project
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Raw image of 90Sr source with current Quad carrier.
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Medipix ASIC
Through-CMOS connections
Multi-layered chip carrier board
Medipix ASIC
Quad sensor
• 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
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Frame and Cooling
Large area (9x9 cm2)< 100 Watts total powerCeramics FrameCooling pipes through framePower through frame
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Roadmap
Through-via carrierZdenek Vykydal
Multi-Gbps carrierBas van der Heijden
RELAXD module(end 2007)John Hug
Current Quad
Frame, Power,Cooling (2009)
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100m RASNIK alignment
Harry van der Graaf
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Coded Mask
Light Source LensCCD
8000 systems installed in ATLAS
Principle of CCD-RASNIK(as used for muon chamber alignment in L3)
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100 m RASNIK for CLICCLIC
Accelerator length: 2 x 15 kmNumber of elements: 15.000Number of ‘4 m’ RASNIKs: 15.000/30.000Number of ‘100 m’ RASNIKs: 600
Laser zone lenshole dia. 50 mm
RasCam
100 m (vacuum tube!)
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Image position on sensor. Response of earthquake in Mid-Atlantic,5 Richter Scale, on March 1, 2007
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Tidal movement: crust deformation due to angular positionof Sun and Moon, measured with RasClic, CERN, Geneva (filtered raw data)
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The ‘Earth Hum’, measured after the ‘tsunami’ earthquake, Xmas 2004[Park et al]
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(Direct) Fourier coverted raw X-data of RasClic, Feb 2007New wide-band seismometer?
‘Hum’ modes