Speaker
Mr
Benoit CAYLAR
(CEA-LIST, Diamond Sensors Laboratory (FR))
Description
We report on the fabrication and test of the first prototype of a 3D
diamond detector for applications in particle physics. Polycrystalline
and single-crystal CVD diamond samples have been processed with a
femto-second laser to create arrays of graphitic columns with a diameter
of a few microns. This 3D geometry of read-out electrodes enhances the
radiation hardness due to the reduced carrier drift path compared to
conventional planar detector geometries. Such an approach had been
successfully tested for silicon detectors where a significant
improvement in radiation hardness has been obtained. By processing 3D
electrodes, we studied the gain brought to the performances of CVD
diamond detectors. The prototypes used conductive graphitic
micro-channels, as fabricated within the diamond bulk using an
femtosecond IR laser (800 nm). Electronic properties of the device were
evaluated, including current-voltage, transient-current, and charge
collection efficiency characteristics using a Sr-90 Source. Complete
prototype single-crystal and polycrystalline 3D diamond detectors with
multi-channel charge integrating read-out have been tested with minimum
ionising radiation in particle beams (proton/pion beam at CERN). Finally
IBIC measurements were used under heavy ions to probe the benefit of the
approach and evaluate the gain in terms of radiation hardness. The
obtained results prove the viability of 3D diamond detectors for
particle physics for the first time.
| quote your primary experiment | Collaboration with RD42 |
|---|
Primary authors
Alexander Oh
(University of Manchester (GB))
Mr
Benoit CAYLAR
(CEA-LIST, Diamond Sensors Laboratory (FR))
Co-authors
Dmitry Hits
(Eidgenoessische Tech. Hochschule Zuerich (CH))
Dr
Dominique TROMSON
(CEA-LIST, Diamond Sensors Laboratory (FR))
Felix Caspar Bachmair
(Eidgenoessische Tech. Hochschule Zuerich (CH))
Harris Kagan
(Ohio State University)
Iain Haughton
(University of Manchester (GB))
Dr
José ALVAREZ
(LGEP-Paris (FR))
Lukas Baeni
(Eidgenoessische Tech. Hochschule Zuerich (CH))
Dr
Michal POMORSKI
(CEA-LIST, Diamond Sensors Laboratory (FR))
Dr
Philippe BERGONZO
(CEA-LIST, Diamond Sensors Laboratory (FR))
Richard Kass
(Ohio State University (US))
linn li
(University of Manchester)
