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@ARTICLE{Pennicard:207201,
author = {Pennicard, D. and Struth, B. and Hirsemann, H. and
Sarajlic, M. and Smoljanin, S. and Zuvic, M. and Lampert, M.
O. and Fritzsch, T. and Rothermund, M. and Graafsma, H.},
title = {{A} {G}ermanium {H}ybrid {P}ixel {D}etector with 55μm
{P}ixel {S}ize and 65,000 {C}hannels},
journal = {Journal of Instrumentation},
volume = {9},
number = {12},
issn = {1748-0221},
address = {London},
publisher = {Inst. of Physics},
reportid = {PUBDB-2015-01184},
pages = {P12003 - P12003},
year = {2014},
note = {OA},
abstract = {Hybrid pixel semiconductor detectors provide high
performance through a combination of direct detection, a
relatively small pixel size, fast readout and sophisticated
signal processing circuitry in each pixel. For X-ray
detection above 20 keV, high-Z sensor layers rather than
silicon are needed to achieve high quantum efficiency, but
many high-Z materials such as GaAs and CdTe often suffer
from poor material properties or nonuniformities. Germanium
is available in large wafers of extremely high quality,
making it an appealing option for high-performance hybrid
pixel X-ray detectors, but suitable technologies for finely
pixelating and bump-bonding germanium have not previously
been available.A finely-pixelated germanium photodiode
sensor with a 256 by 256 array of 55μm pixels has been
produced. The sensor has an n-on-p structure, with 700μm
thickness. Using a low-temperature indium bump process, this
sensor has been bonded to the Medipix3RX photoncounting
readout chip. Tests with the LAMBDA readout system have
shown that the detector works successfully, with a high bond
yield and higher image uniformity than comparable high-Z
systems. During cooling, the system is functional around
-80°C (with warmer temperatures resulting in excessive
leakage current), with -100°C sufficient for good
performance.},
cin = {FS-DS},
ddc = {610},
cid = {I:(DE-H253)FS-DS-20120731},
pnm = {541 - Photons (POF2-541)},
pid = {G:(DE-HGF)POF2-541},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000345859200019},
doi = {10.1088/1748-0221/9/12/P12003},
url = {https://bib-pubdb1.desy.de/record/207201},
}