64 research outputs found
Distributed readout detectors using superconducting tunnel junctions
Superconducting tunnel junctions (STJs) are able to measure the energy of
single photons in the range from near infrared to X-rays. They provide
simultaneous information of the impact time and wavelength of an absorbed
photon. The main difficulty of these detectors compared with conventional
imaging detectors lies in their limited pixel number. Each STJ has to be
connected independently and therefore the wiring becomes technologically more
demanding as the number of STJs increases. One approach to solving this problem
is to use a single large absorber and to distribute STJs for position sensitive
signal readout. This configuration is able to detect single optical photons
with an energy resolution close to that of a single STJ pixel.
We have produced a Ta absorber strip with Ta/Al/AlOx/Al/Nb/Ta junctions at
either end. The energy and position of single photons were measured
simultaneously. The energy resolving power approaches the theoretical limit. We
will present a simple Monte Carlo simulation which reproduces the measurement
exactly.Comment: 3 pages, 2 figure
2009-2010 Master Class - Elmar Oliveira (Violin)
https://spiral.lynn.edu/conservatory_masterclasses/1089/thumbnail.jp
Strukturanalyse von Automobilkomponenten für zukünftige elektrifizierte Fahrzeugantriebe (AELFA)
Transport impacts on atmosphere and climate: Land transport
Emissions from land transport, and from road transport in particular, have significant impacts on the atmosphere and on climate change. This assessment gives an overview of past, present and future emissions from land transport, of their impacts on the atmospheric composition and air quality, on human health and climate change and on options for mitigation. In the past vehicle exhaust emission control has successfully reduced emissions of nitrogen oxides, carbon monoxide, volatile organic compounds and particulate matter. This contributed to improved air quality and reduced health impacts in industrialised countries. In developing countries however, pollutant emissions have been growing strongly, adversely affecting many populations. In addition, ozone and particulate matter change the radiative balance and hence contribute to global warming on shorter time scales. Latest knowledge on the magnitude of land transport's impact on global warming is reviewed here. In the future, road transport's emissions of these pollutants are expected to stagnate and then decrease globally. This will then help to improve the air quality notably in developing countries. On the contrary, emissions of carbon dioxide and of halocarbons from mobile air conditioners have been globally increasing and are further expected to grow. Consequently, road transport's impact on climate is gaining in importance. The expected efficiency improvements of vehicles and the introduction of biofuels will not be sufficient to offset the expected strong growth in both, passenger and freight transportation. Technical measures could offer a significant reduction potential, but strong interventions would be needed as markets do not initiate the necessary changes. Further reductions would need a resolute expansion of low-carbon fuels, a tripling of vehicle fuel efficiency and a stagnation in absolute transport volumes. Land transport will remain a key sector in climate change mitigation during the next decades
The WaveDAQ integrated Trigger and Data Acquisition System for the MEG II experiment
The WaveDAQ is a newly-designed digitization Trigger and Data AcQuisition
system (TDAQ) allowing Multi-gigasample waveform recording on a large amount of
channels (up to 16384) by using the DRS4 analog switched capacitor array as
downconverting ASIC. A high bandwidth, programmable input stage has been
coupled with a bias generator to allow SiPM operation without need of any other
external apparatus. The trigger generation is tightly coupled within the system
to limit the required depth of the analog memory, allowing faster digitization
speeds. This system has been designed for the MEG experiment upgrade but also
proved to be highly scalable and already found other applications.Comment: This manuscript is for conference record of the 21st IEEE Real Time
conference onl
Light Weight Strategies for Automative Mg Applications to Reduce Vehicle's Mass and CO2 Emissions
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