Diamond Detector R

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Diamond Detector RD in Minsk
.

K. Afanaciev, M. Baturitsky, I. Emeliantchik, A.
Ignatenko, A. Litomin, V. Shevtsov
The Xth International School-Seminar The Actual
Problems of Microworld Physics Gomel, Belarus
2009

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Availible technology
Synthetic monocrystalline diamonds (HPHT process)
produced by ADAMAS plant near Minsk
(www.bsuproduct.by/index.php/.91....1.0.0.html) Th
e diamond plate size of 5x5 mm area and 200-1000
um thickness Different catalytic environments and
synthesis conditions are investigated in order to
reduce the impurity content. The detectors could
be used in beam monitoring and similar
applications. Our institute have the
following facilities CCD measurement setup
Absorption spectroscopy setup (optical)
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Current work
Adamas is working on the optimisation of
synthesis process We are working on establishing
the selection criteria to distinguish detector
grade crystals without cutting and
metallisation Optical absorption spectroscopy
Lower N content -gt edge closer to UV
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Current work
Absorption spectroscopy results
CCD 25 um
Lower N content -gt edge closer to UV -gt better
detector properties
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Current work
Thermobaric treatment - HPHT annealing
CCD 50 um
CCD 12 um
CCD 90 um
CCD 25 um
Aggregation of N impurity -gt better detector
properties
Thermobaric treatment seems to improve the
detector properties
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Current work
A number of samples were investigated - so far
the samples with good optical spectrum show
CCD above the average 10-20 um vs lt 10
um Investigation of different catalytic
environments and their influence Proofing the
optical selection method on a larger cyrstal
selection
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Future work
Nitrogen pulse laser will be used for optical
fluorescence spectrocopy This will allow to get
more information about impurities and improve the
selection process
A number of new synthesis thechniques will be
tried out by ADAMAS