SLIDE 6 RECFA review
Signal/Noise 20 40 60 80 100 120 Events 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Signal/noise in 1 pixel (small diode)
- ILC Vx Detector : CMOS Sensor Achievements
∼ 15 (MIMOSA) prototypes designed, fabricated and characterised since 1999 Most chips tested on H.E. beams (SPS, DESY) → well established performances :
- N ∼ 10 e− → S/N 20 – 30 → ǫdet 99.5 %
- σsp ∼ 1.5 µm
- Thinning to 50 µm → next : 35 µm
- Toper. 40 ◦C
- Rad. tolerance 1 MRad, 1012neq/cm2 → next : 1013neq/cm2
- Architecture with integrated discri. validated ( ǫdet 99.3 % ; fake 10−3 ) → next : integrated ADC & ∅
Signal/Noise
20 40 60 80 100 120 140
hsn1
Entries 6067 Mean 41.07 RMS 23.57 Underflow Overflow 202 / ndf
2
χ 199.8 / 131 Constant 18.14 ± 930.5 MPV 0.188 ± 26.27 Sigma 0.1017 ± 6.521
Signal/Noise
20 40 60 80 100 120 140 Events 20 40 60 80 100 120 140 160 180
hsn1
Entries 6067 Mean 41.07 RMS 23.57 Underflow Overflow 202 / ndf
2
χ 199.8 / 131 Constant 18.14 ± 930.5 MPV 0.188 ± 26.27 Sigma 0.1017 ± 6.521 Signal/noise in 1 pixels
C)
10 20 30 40 Efficency % 99 99.2 99.4 99.6 99.8 100 100.2
pitch 20 small diode chip 1 pitch 30 small diode chip 1 pitch 40 small diode chip 1 pitch 20 small diode chip 3 pitch 30 small diode chip 3 pitch 40 small diode chip 3
Efficency vs Temperature Small Diode
Pitch (microns)
15 20 25 30 35 40 45 Resolution (microns)
1 1.5 2 2.5 3 3.5
Mimosa 9: resolution vs pitch
MIMOSA sensors will equip : STAR Heavy Flavour Tagger: 1) 2008 (analog)
2) 2011 (digital)
EUDET beam telescope: 1) 2007 (analog)
2) 2008 (digital) and are further developed (rad.tol.) for CBM Vertex Detector (FAIR/GSI 2012)
Spin-off: bio-medical imaging (SUCIMA/FP5 ; GIS with Photonis-Dep)
12/05/06, –6–