4,764 research outputs found
Hydrogen safety Progress report no. 7 1 Jul. - 30 Sep. 1965
Performance characteristics of two console-type hydrogen gas detectors sampling by diffusion and convectio
Micropattern gas detectors
An overview of Micropattern Gas Detectors is given. Recent progress of detector research, especially in the context of Micromegas and Gas Electron Multipliers, is discussed. A particular emphasis is put on the pixelized readout with a dedicated ASIC nameed Timepix, where new results with both gas amplification stages atop this chip are presented
Candidate eco-friendly gas mixtures for MPGDs
Modern gas detectors for detection of particles require F-based gases for optimal performance.Recent regulations demand the use of environmentally unfriendly F-based gases t o be limited or banned. This review studies properties of potential eco-friendly gas candidate replacements
Investigation of gamma-ray sensitivity of neutron detectors based on thin converter films
Currently, many detector technologies for thermal neutron detection are in
development in order to lower the demand for the rare 3He gas. Gas detectors
with solid thin film neutron converters readout by gas proportional counter
method have been proposed as an appropriate choice for applications where large
area coverage is necessary. In this paper, we investigate the probability for
gamma-rays to generate a false count in a neutron measurement. Simulated
results are compared to measurement with a 10B thin film prototype and a 3He
detector. It is demonstrated that equal gamma-ray rejection to that of 3He
tubes is achieved with the new technology. The arguments and results presented
here are also applicable to gas detectors with converters other than solid 10B
layers, such as 6Li layers and 10BF3 gas.Comment: Submitted to Journal of Instrumentatio
Charge Transfer Properties Through Graphene Layers in Gas Detectors
Graphene is a single layer of carbon atoms arranged in a honeycomb lattice
with remarkable mechanical, electrical and optical properties. For the first
time graphene layers suspended on copper meshes were installed into a gas
detector equipped with a gaseous electron multiplier. Measurements of low
energy electron and ion transfer through graphene were conducted. In this paper
we describe the sample preparation for suspended graphene layers, the testing
procedures and we discuss the preliminary results followed by a prospect of
further applications.Comment: 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference
with the 21st Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray
Detectors, 4 pages, 8 figure
Off line Parallax Correction for Neutral Particle Gas Detectors
In a neutral particle gas detector, the parallax error resulting from the
perpendicular projection on the detection plane or wire of the radial particle
trajectories emanating from a point like source (such as a scattering sample)
can significantly spoil the apparent angular resolution of the detector.
However, as we will show, the information is not lost. We propose an off line
data treatment to restore as much as possible the original scattering
information in the case of a one-dimensional parallax effect. The reversibility
of parallax follows from the algebraic structure of this effect, which is
different from the resolution loss which is essentially irreversible. The
interplay between finite resolution and parallax complicates the issue, but
this can be resolved
Micro-pattern gas detectors
Micro-strip gas chambers, with their excellent localization properties, high rate capability and good granularity, have been adopted by many experiments in particle physics. Two recurrent problems however have been reported: a slow degradation under sustained irradiation (or aging), and the rare but devastating occurrence of discharges. New breeds of detectors aim at improving on these crucial points, the micro-dot, CAT, micromegas, the gas electron multiplier are examples. Very performing, they are moreover robust and reliable. Two-stage devices, making use of a gas electron multiplier as first element, permit larger gains in presence of high rates and heavily ionizing tracks. Possible promising future developments in the field are outlined
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