Short ( and incomplete) characteristics of CVD diamond detectors - PowerPoint PPT Presentation

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Diamond as a detector material low dielectric constant low capacity low noise good heat conductivity ( 5 x higher than Cu ) large band gap of 5.5 eV small signal (< half of a Si of similar size) high charge carrier velocity saturation fast pulse response time

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Short ( and incomplete) characteristics of CVD diamond detectors

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Short and incomplete characteristics of cvd diamond detectors l.jpg

Diamond as a detector material

low dielectric constant

low capacity

low noise

good heat conductivity

( 5 x higher than Cu )

large band gap of 5.5 eV

small signal (< half of a Si of similar size)

high charge carrier velocity saturation

fast pulse response time

Diamond Crystal production

chemical vapour deposition (CVD)

commercial production

polycrystaline diamonds (PCD)

thickness 0.5-500mm

max size ~ 5x5cm2

price ? (100 euro/det.)

single crystal diamond (SCD)

smaller ( 4x4 mm2)

better performance (energy resolution)

more expensive (5xPCD)

Diamond detectors performance

very fast timing

pulse risetime: 200 ps

width: 2ns (PCD) 5ns (SCD)

operating voltage 1 V/mm

radiation hardness

-Tests with 2x1015 p/cm2 did not show any significant deterioration of a sig./noise

-pumping effect (PCD) : improvement with increasing dose

position resolution

below 10mm can be achieved with strip detectors X and Y

efficiency

70%PCD-100% PCD

Diamonds as TOF detectors

tests with 1GeV/u U beam resulted in TOF of s=20 ps

Short ( and incomplete) characteristics of CVD diamond detectors

Cr-Au foil ~0.1mm


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http://rd42.web.cern.ch/RD42/

http://www-norhdia.gsi.de

INFN-MI, Milano, Italy

Electronics, ToF-detectorsCEA-Saclay, France diamond growth, sensor modelling

DESY-Zeuthen, Germany E-, ToF-detectors, modelling, electronics

GSI, Darmstadt, Germany E-, ToF-dectors, irradiations, detector characterisation, micro-beam mappingIFIN-HH, Bucharest, Romania Electronics, ToF-detectors, modellingCERN, Geneva, Switzerland Detector characterisation Karlsruhe University, Germany Detector characterization, irradiations

IJS, Ljubljana, Slovenia Irradiations VERA Laboratory, Vienna, Austria E-detectors Wits University, Johannesburg, South Africa Diamond substratesKurchatov Institute, Moscow, Russia

ESRF Grenoble, France sample characterisationAIST, Tsukuba, Japan

Industrial partners:

Element six, Ascot, Berkshire, UK

ideas

Coordinator:

E. Berdermann (GSI)


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  • News from I3HP & NoRHDia - Eleni Berdermann


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But for PCD much worst !

  • News from I3HP & NoRHDia - Eleni Berdermann


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  • SC-Diamond for ToF measurements with relativistic particles:

  • First beam test with 27Al ions of 2 GeV/amu - Mladen Kis


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  • SC-Diamond for ToF measurements with relativistic particles:

  • First beam test with 27Al ions of 2 GeV/amu - Mladen Kis


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  • But at 5 MeV/u a middle-light (A ~20) HI beam stops in ~ 50 mm of a diamond layer


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