Author:
Casse G.,Massari N.,Franks M.,Parmesan L.
Abstract
Abstract
Silicon sensors are the most diffuse position sensitive
device in particle physics experiments and in countless applications
in science and technology. They had a spectacular progress in
performance over almost 40 years since their first introduction, but
their evolution is now slowing down. The position resolution for
single particle hits is larger than a few microns in the most
advanced sensors. This value was reached already over 30 years
ago [1]. The minimum ionising path length a sensor can detect
is several tens of microns. There are fundamental reasons why these
limits will not be substantially improved by further refinements of
the current technology. This makes silicon sensors unsuitable to
applications where the physics signature is the short path of a
recoiling atom and constrains the layout of physics experiments
where they represent by far the best option like high energy physics
collider experiments. In perspective, the availability of sensors
with sub-micron spatial resolution, in the order of a few tens of
nanometres, would be a disruptive change for the sensor technology
with a foreseeable huge impact on experiment layout and various
applications of these devices. For providing such a leap in
resolution, we propose a novel design based on a purely digital
circuit. This disruptive concept potentially enables pixel sizes
much smaller than 1 μm2 and a number of advantages in
terms of power consumption, readout speed and reduced thickness (for
low mass sensors).
Subject
Mathematical Physics,Instrumentation
Cited by
1 articles.
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