49,809 research outputs found
The Highly Miniaturised Radiation Monitor
We present the design and preliminary calibration results of a novel highly
miniaturised particle radiation monitor (HMRM) for spacecraft use. The HMRM
device comprises a telescopic configuration of active pixel sensors enclosed in
a titanium shield, with an estimated total mass of 52 g and volume of 15
cm. The monitor is intended to provide real-time dosimetry and
identification of energetic charged particles in fluxes of up to 10
cm s (omnidirectional). Achieving this capability with such a
small instrument could open new prospects for radiation detection in space.Comment: 17 pages, 15 figure
Pixel Detectors for Tracking and their Spin-off in Imaging Applications
To detect tracks of charged particles close to the interaction point in high
energy physics experiments of the next generation colliders, hybrid pixel
detectors, in which sensor and read-out IC are separate entities, constitute
the present state of the art in detector technology. Three of the LHC detectors
as well as the BTeV detector at the Tevatron will use vertex detectors based on
this technology. A development period of almost 10 years has resulted in pixel
detector modules which can stand the extreme rate and timing requirements as
well as the very harsh radiation environment at the LHC for its full life time
and without severe compromises in performance. From these developments a number
of different applications have spun off, most notably for biomedical imaging.
Beyond hybrid pixels, a number of trends and possibilities with yet improved
performance in some aspects have appeared and presently developed to greater
maturity. Among them are monolithic or semi-monolithic pixel detectors which do
not require complicated hybridization but come as single sensor/IC entities.
The present state in hybrid pixel detector development for the LHC experiments
as well as for some imaging applications is reviewed and new trends towards
monolithic or semi-monolithic pixel devices are summarized.Comment: 24 pages, 16 figure
Trends in Pixel Detectors: Tracking and Imaging
For large scale applications, hybrid pixel detectors, in which sensor and
read-out IC are separate entities, constitute the state of the art in pixel
detector technology to date. They have been developed and start to be used as
tracking detectors and also imaging devices in radiography, autoradiography,
protein crystallography and in X-ray astronomy. A number of trends and
possibilities for future applications in these fields with improved
performance, less material, high read-out speed, large radiation tolerance, and
potential off-the-shelf availability have appeared and are momentarily matured.
Among them are monolithic or semi-monolithic approaches which do not require
complicated hybridization but come as single sensor/IC entities. Most of these
are presently still in the development phase waiting to be used as detectors in
experiments. The present state in pixel detector development including hybrid
and (semi-)monolithic pixel techniques and their suitability for particle
detection and for imaging, is reviewed.Comment: 10 pages, 15 figures, Invited Review given at IEEE2003, Portland,
Oct, 200
A review of advances in pixel detectors for experiments with high rate and radiation
The Large Hadron Collider (LHC) experiments ATLAS and CMS have established
hybrid pixel detectors as the instrument of choice for particle tracking and
vertexing in high rate and radiation environments, as they operate close to the
LHC interaction points. With the High Luminosity-LHC upgrade now in sight, for
which the tracking detectors will be completely replaced, new generations of
pixel detectors are being devised. They have to address enormous challenges in
terms of data throughput and radiation levels, ionizing and non-ionizing, that
harm the sensing and readout parts of pixel detectors alike. Advances in
microelectronics and microprocessing technologies now enable large scale
detector designs with unprecedented performance in measurement precision (space
and time), radiation hard sensors and readout chips, hybridization techniques,
lightweight supports, and fully monolithic approaches to meet these challenges.
This paper reviews the world-wide effort on these developments.Comment: 84 pages with 46 figures. Review article.For submission to Rep. Prog.
Phy
ATLAS Upgrade Instrumentation in the US
Planned upgrades of the LHC over the next decade should allow the machine to
operate at a center of mass energy of 14 TeV with instantaneous luminosities in
the range 5--7e34 cm^-2 s^-1. With these parameters, ATLAS could collect 3,000
fb^-1 of data in approximately 10 years. However, the conditions under which
this data would be acquired are much harsher than those currently encountered
at the LHC. For example, the number of proton-proton interactions per bunch
crossing will rise from the level of 20--30 per 50 ns crossing observed in 2012
to 140--200 every 25 ns. In order to deepen our understanding of the newly
discovered Higgs boson and to extend our searches for physics beyond that new
particle, the ATLAS detector, trigger, and readout will have to undergo
significant upgrades. In this whitepaper we describe R&D necessary for ATLAS to
continue to run effectively at the highest luminosities foreseen from the LHC.
Emphasis is placed on those R&D efforts in which US institutions are playing a
leading role.Comment: Snowmass contributed paper, 24 pages, 12 figure
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