A spectroscopy pipeline for the Canary island long baseline observatory meteor detection system

2020 ◽  
Vol 180 ◽  
pp. 104773 ◽  
Author(s):  
Regina Rudawska ◽  
Joe Zender ◽  
Detlef Koschny ◽  
Hans Smit ◽  
Stefan Löhle ◽  
...  
Keyword(s):  
Canary Island ◽  
Detection System ◽  
Long Baseline ◽  
Meteor Detection

scholarly journals Optical Search for High Meteors in Hyperbolic Orbits

1996 ◽  
Vol 150 ◽  
pp. 83-86 ◽  
Author(s):  
S.C. Woodworth ◽  
R.L. Hawkes
Keyword(s):  
Southern Hemisphere ◽  
Detection System ◽  
Mass Range ◽  
Television Studies ◽  
Apparent Magnitude ◽  
Correction Factors ◽  
Short Baseline ◽  
Preliminary Results ◽  
Meteor Detection ◽  
Small Fields

AbstractDual-station image intensified television studies have indicated very few meteors at heights greater than 120 km, and few statistically significant hyperbolic orbits. However, the optimum intersection height for these studies was about 95 km, and the relatively small fields of view resulted in a bias against high (and therefore fast) meteors. We have developed height sensitivity correction factors, and found that short baseline television studies resulted in relatively little bias against high meteors, and the absence of meteors above 120 km appears to be real. We report preliminary results from a three-station, image-intensified video meteor detection system sensitive to apparent magnitude about +9.5 with optimum intersection heights 115-125 km. We have detected neither particularly high meteors nor meteors in clearly hyperbolic orbits. We conclude that the proportion of true hyperbolic meteors in the mass range 10-4 to 10-6 kg is less than a few percent, and that optical meteors corresponding to meteoroids in this mass range do not ablate at heights above approximately 120 km. We suggest several ways to reconcile these results with southern hemisphere radar studies.

A coincidence long baseline celestial gamma-ray burst detection system

1975 ◽  
Vol 129 (2) ◽  
pp. 613-616 ◽  
Author(s):  
D.J. Fegan ◽  
B. McBreen ◽  
C. O'Sullivan ◽  
V. Ruddy
Keyword(s):  
Gamma Ray ◽  
Detection System ◽  
Burst Detection ◽  
Gamma Ray Burst ◽  
Long Baseline

scholarly journals A double-station meteor camera setup in the Canary Islands – CILBO

2013 ◽  
Vol 3 (2) ◽  
pp. 489-514
Author(s):  
D. Koschny ◽  
F. Bettonvil ◽  
J. Licandro ◽  
C. v. d. Luijt ◽  
J. Mc Auliffe ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
Canary Islands ◽  
Canary Island ◽  
Dust Particles ◽  
Earth’S Atmosphere ◽  
Long Baseline ◽  
La Palma ◽  
Scientific Results ◽  
Heliocentric Orbits

Abstract. Meteors are caused by dust particles in the solar system which enter the Earth's atmosphere. Using double-station camera setups, the precise trajectory of these dust particles can be determined. The initial heliocentric orbits of the dust can be derived and valuable information about their distribution, velocities, and composition can be determined. This paper describes a double-station camera setup in the Canary Islands, called CILBO (Canary Island Long-Baseline Observatory). It makes use of automated roll-off roofs to house one camera on Tenerife, one on La Palma, monitoring the same volume of the atmosphere. From the obtained data, the meteoroid trajectory can be computed. A second camera on Tenerife is equipped with an objective grating. For bright meteors, a spectrum is recorded which allows to constrain the chemical composition of the meteor. The system is completely automated and sends the obtained data after every observing night to a central ftp server. It has been in operation for almost two years and the first scientific results are produced.

scholarly journals A double-station meteor camera set-up in the Canary Islands – CILBO

2013 ◽  
Vol 2 (2) ◽  
pp. 339-348 ◽  
Author(s):  
D. Koschny ◽  
F. Bettonvil ◽  
J. Licandro ◽  
C. v. d. Luijt ◽  
J. Mc Auliffe ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Canary Islands ◽  
Canary Island ◽  
Video Cameras ◽  
Long Baseline ◽  
La Palma ◽  
Scientific Results ◽  
Set Up

Abstract. This paper describes a double-station camera set-up in the Canary Islands, called CILBO (Canary Island Long-Baseline Observatory). Image-intensified video cameras – one camera on Tenerife and one on La Palma – monitor the same volume of the atmosphere. They are located in automated roll-off roofs. From the obtained data, the meteoroid trajectory can be computed. A second camera on Tenerife is equipped with an objective grating. For bright meteors (typically 0 mag or brighter), a spectrum is recorded which allows constraining the chemical composition of the meteor. The system is completely automated and sends the obtained data after every observation night to a central FTP server. It has been in operation for about 2 yr and the first scientific results have been produced.

scholarly journals Scintillation light detection in the 6-m drift length ProtoDUNE Dual Phase liquid argon TPC

2022 ◽  
Vol 17 (01) ◽  
pp. C01012
Author(s):  
I. Gil‐Botella
Keyword(s):  
Detection System ◽  
Leading Edge ◽  
Liquid Argon ◽  
Neutrino Experiment ◽  
Dual Phase ◽  
Scintillation Light ◽  
Light Production ◽  
Long Baseline ◽  
Drift Length ◽  
Time Projection

Abstract The Deep Underground Neutrino Experiment (DUNE) is a leading-edge experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. ProtoDUNE-Dual Phase (DP) is a 6 × 6 × 6 m3 liquid argon time-projection-chamber (LArTPC) operated at the CERN Neutrino Platform in 2019–2020 as a prototype of the DUNE far detector. In ProtoDUNE-DP, the scintillation and electroluminescence light produced by cosmic muons in the LArTPC is collected by photomultiplier tubes placed up to 7 m away from the ionizing track. In this paper, we present the performance of the ProtoDUNE-DP photon detection system, comparing different wavelength-shifting techniques and the use of xenon-doped LAr as a promising option for future large LArTPCs. The scintillation light production and propagation processes are analyzed and compared to simulations, improving understanding of the liquid argon properties.

Analysis of electron-diffraction intensity profiles using a photodiode-array detection system

1983 ◽  
Vol 41 ◽  
pp. 322-323
Author(s):  
J. B. Warren
Keyword(s):  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Detection System ◽  
High Energy ◽  
Photographic Emulsion ◽  
Diffraction Intensity ◽  
Silicon Photodiode ◽  
Photodiode Array Detection ◽  
Analog To Digital ◽  
Photodiode Array

Electron diffraction intensity profiles have been used extensively in studies of polycrystalline and amorphous thin films. In previous work, diffraction intensity profiles were quantitized either by mechanically scanning the photographic emulsion with a densitometer or by using deflection coils to scan the diffraction pattern over a stationary detector. Such methods tend to be slow, and the intensities must still be converted from analog to digital form for quantitative analysis. The Instrumentation Division at Brookhaven has designed and constructed a electron diffractometer, based on a silicon photodiode array, that overcomes these disadvantages. The instrument is compact (Fig. 1), can be used with any unmodified electron microscope, and acquires the data in a form immediately accessible by microcomputer.Major components include a RETICON 1024 element photodiode array for the de tector, an Analog Devices MAS-1202 analog digital converter and a Digital Equipment LSI 11/2 microcomputer. The photodiode array cannot detect high energy electrons without damage so an f/1.4 lens is used to focus the phosphor screen image of the diffraction pattern on to the photodiode array.

Data Acquisition and Handling Unit for a Quantitative Use of Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 232-233 ◽  
Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex
Keyword(s):  
Electron Microscope ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Single Channel ◽  
Detection System ◽  
Surface Barrier ◽  
Solid State Detector ◽  
Electrostatic Mirror ◽  
Electron Energy Loss

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

Quantitative EPMA of nitrogen : A tricky element in the electron-probe microanalyzer

1992 ◽  
Vol 50 (2) ◽  
pp. 1622-1623
Author(s):  
G.F. Bastin ◽  
H.J.M. Heijligers
Keyword(s):  
Background Subtraction ◽  
Electron Probe ◽  
Detection System ◽  
Higher Order ◽  
Light Elements ◽  
Strong Suppression ◽  
Electron Probe Microanalyzer ◽  
Quantitative Epma ◽  
Peak Count ◽  
Lead Stearate

Among the ultra-light elements B, C, N, and O nitrogen is the most difficult element to deal with in the electron probe microanalyzer. This is mainly caused by the severe absorption that N-Kα radiation suffers in carbon which is abundantly present in the detection system (lead-stearate crystal, carbonaceous counter window). As a result the peak-to-background ratios for N-Kα measured with a conventional lead-stearate crystal can attain values well below unity in many binary nitrides . An additional complication can be caused by the presence of interfering higher-order reflections from the metal partner in the nitride specimen; notorious examples are elements such as Zr and Nb. In nitrides containing these elements is is virtually impossible to carry out an accurate background subtraction which becomes increasingly important with lower and lower peak-to-background ratios. The use of a synthetic multilayer crystal such as W/Si (2d-spacing 59.8 Å) can bring significant improvements in terms of both higher peak count rates as well as a strong suppression of higher-order reflections.

High performance Nanogold™-in situ hybridzation and its use in the detection of hybridized and PCR-amplified microscopical preparations

1996 ◽  
Vol 54 ◽  
pp. 896-897
Author(s):  
G. W. Hacker ◽  
I. Zehbe ◽  
J. Hainfeld ◽  
A.-H. Graf ◽  
C. Hauser-Kronberger ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Messenger Rna ◽  
High Performance ◽  
Detection System ◽  
Direct Methods ◽  
Genetic Alterations ◽  
Chain Reaction ◽  
Protein Encoding ◽  
Polymerase Chain

In situ hybridization (ISH) with biotin-labeled probes is increasingly used in histology, histopathology and molecular biology, to detect genetic nucleic acid sequences of interest, such as viruses, genetic alterations and peptide-/protein-encoding messenger RNA (mRNA). In situ polymerase chain reaction (PCR) (PCR in situ hybridization = PISH) and the new in situ self-sustained sequence replication-based amplification (3SR) method even allow the detection of single copies of DNA or RNA in cytological and histological material. However, there is a number of considerable problems with the in situ PCR methods available today: False positives due to mis-priming of DNA breakdown products contained in several types of cells causing non-specific incorporation of label in direct methods, and re-diffusion artefacts of amplicons into previously negative cells have been observed. To avoid these problems, super-sensitive ISH procedures can be used, and it is well known that the sensitivity and outcome of these methods partially depend on the detection system used.

Sign in / Sign up

Export Citation Format

Share Document