Wednesday, January 29, 2014

Wafer-scale design of lightweight and transparent electronics that wraps around hairs

ETH Zürich contributors: Giovanni A. Salvatore, Niko Münzenrieder, Thomas Kinkeldei, Luisa Petti, Christoph Zysset, Ivo Strebel, Lars Büthe & Gerhard Tröster
A new way of making ultra thin, flexible and transparent electronics has been unveiled by researchers in Switzerland. The technique involves fabricating micron-thick electronic devices on a conventional silicon wafer, which is later detached by soaking it in water. The free-floating devices can then be placed onto a variety of biological tissues, including human skin and even a single hair. The technology could be used to make "smart" contact lenses for monitoring the pressure in an eyeball or for creating flexible solar cells.

Energy Resolution & Linearity of the CAEN MCA DT5780

The Digital Multi Channel Analyzer DT5780 represents the synthesis of CAEN's long lasting experience in high voltage power supplies and in digital acquisition systems. The device houses two HV channels with ±5 kV maximum voltage and two 14 bit acquisition channels with 100 MS/s sampling rate. The device allows through its internal logic to require coincidences and anti‐coincidences between events triggered by the two acquisition channels.

In the present Application Note we report the results obtained in internal tests of the Digital Multi Channel Analyzer DT5780. We are going to show the resolution of the energy measurement of gamma and X rays obtained with a HPGe detector. The wide spectrum of energy available allows also to obtain a preliminary test of the linearity of our MCA. We want underline that this test is preliminary and does not take into account the nonlinearity of the HPGe detector and the preamplifier, and possible dependencies on the event acquisition rate.

Click to download application note PDF

Click for technical details on DT5780
 

Wednesday, January 15, 2014

World's Smallest Quadrupole RGA

This is an analytical technique used for identifying gases present in a vacuum chamber. The equipment used in performing the analysis is a mass filter of quadrupole type. A typical RGA has three major parts, namely, an ionizer, a mass analyzer and an ion detector.
 
Residual gas analyzers operate by creating a beam of ions from samples of the gas being analyzed. The resulting blend of ions is separated into individual species through their charge-to-mass ratios. The output of an RGA is a spectrum that shows the relative intensities of the various species present in the gas. This output is referred to as a mass scan or also mass spectrum. 
 

Tuesday, January 14, 2014

Powerful Solution for the Emulation of Any Detection Setup

The Digital Detector Emulator is a multichannel instrument for the emulation of radiation detection systems. The algorithm is initialized by a reference pulse shape, with statistical distribution of amplitude and time. Then a statistical stream of events is generated according to the input distributions. The events can be also selectively summed together simulating the pile-up phenomenon. An arbitrarily generated noise and a baseline drift can be superimposed to each pulse.

Therefore, the instrument is not a pulse generator of recorded shapes, but it is a synthesizer of random pulses compliant with programmable statistical distributions of energy spectrum, time distribution, and pulse shape. The stream of emulated signals becomes a statistical sequence of pulses, reflecting the programmed input features (e.g. energy spectrum, time distribution, noise, signal shape, etc.). When the emulation process is reset, the kernels of generators can be either re-initialized with new random data making the sequence always different, or they can be stored to reproduce the same sequence many times.

Wednesday, January 8, 2014

Krytox® PFPE in Vacuum Applications

Krytox® performance lubricants are the products of choice for applications where complete nonflammability, oxygen compatibility, and resistance to aggressive chemicals are requirements. These synthetic lubricants provide superior performance and extended life as lubricants and sealants.

xtronix caters to a variety of vacuum and non-vacuum applications with different grades of Krytox® oils and greases. We have addressed aerospace related markets, high voltage industrial applications, paper mills, tribology applications in clean room environments, and many others.

An important area of use for Krytox® relates to vacuum-based applications:
• Vacuum pumps, where safety is critical
• Hostile environments, where semiconductor process chemicals can attack most other lubricants
• Vacuum system valves, seals, bearings and connectors, where low vapor pressure, outgassing, and contamination are intolerable
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