scholarly journals Determining Muon Detection Efficiency Rates of Limited Streamer Tube Modules using Cosmic Ray Detector

2004 ◽  
Author(s):  
M Pan
Keyword(s):  
Detection Efficiency ◽  
Cosmic Ray ◽  
Streamer Tube ◽  
Muon Detection

Advanced Readout Electronics System for Portable Cosmic Ray Muon Detection

2021 ◽  
Vol 70 ◽  
pp. 1-11
Author(s):  
Nan Chen ◽  
Sijie Chen ◽  
Wei He ◽  
Xiaochun He ◽  
Tingcun Wei
Keyword(s):  
Cosmic Ray ◽  
Readout Electronics ◽  
Muon Detection

scholarly journals On Cosmic Rays, IP Structures and Geospace Consequences During WHI

2009 ◽  
Vol 5 (H15) ◽  
pp. 488-490
Author(s):  
A. Dal Lago ◽  
F. L. Guarnieri ◽  
M. R. da Silva ◽  
W. D. Gonzalez ◽  
C. R. Braga ◽  
...  
Keyword(s):  
High Speed ◽  
Interplanetary Space ◽  
Cosmic Ray ◽  
Corotating Interaction Regions ◽  
Near Earth Space ◽  
Long Duration ◽  
Minimum Solar Activity ◽  
Interaction Regions ◽  
Muon Detection ◽  
Whole Heliosphere Interval

AbstractThis work presents some observations during the period of the Whole Heliosphere Interval (WHI) of the effects of interplanetary (IP) structures on the near-Earth space using three sets of observations: magnetic field and plasma from the Advanced Composition Explorer (ACE) satellite, ground-based cosmic ray data from the Global Muon Detection Network (GMDN) and geomagnetic indices (Disturbance storm-time, Dst, and auroral electrojet index, AE). Since WHI was near minimum solar activity, high speed streams and corotating interaction regions (CIRs) were the dominant structures observed in the interplanetary space surrounding Earth. Very pronounced geomagnetic effects are shown to be correlated to CIRs, especially because they can cause the so-called High-Intensity Long-Duration Continuous AE Activity (HILDCAAs) - Tsurutani and Gonzalez (1987). At least a few high speed streams can be identified during the period of WHI. The focus here is to characterize these IP structures and their geospace consequences.

scholarly journals Effective exploitation of a geyser bubble-chamber equipment as a background-free fast neutron detector

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
R. Bertoni ◽  
G. Bruno ◽  
N. Burgio ◽  
M. Corcione ◽  
L. Cretara ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Detection Efficiency ◽  
Bubble Chamber ◽  
Cosmic Ray ◽  
Operating Conditions ◽  
Fast Neutrons ◽  
Detector Response ◽  
Air Showers ◽  
Neutron Component ◽  
Neutron Activity

AbstractThe MOSCAB equipment, a geyser-concept bubble-chamber originally thought for the search of dark matter in the form of WIMPs, is employed for the detection of fast neutrons. Once the background-free operating conditions are determined such that the detector is sensitive only to neutrons, which occurs when the neutron energy threshold required for nucleation is higher than approximately 2.5 MeV, the detector response to fast neutrons is investigated using a $${^{241}}$$ 241 AmBe neutron source. Sets of detection efficiency functions are then produced via Monte Carlo simulations and post-processing, their validation being performed experimentally and discussed. Finally, the use of the detector to measure the fast neutron activity of very weak n-sources in low neutron background environments, as well as to monitor the cosmic ray variations through the neutron component of the Extensive Air Showers, is considered.

Lateral distribution and energy spectra of high-energy muons in cosmic-ray air showers

1990 ◽  
Vol 68 (1) ◽  
pp. 41-48 ◽  
Author(s):  
D. K. Basak ◽  
S. K. Sarkar ◽  
N. Mukherjee ◽  
S. Sanyal ◽  
B. Ghosh ◽  
...  
Keyword(s):  
Size Range ◽  
Detection Efficiency ◽  
Cosmic Ray ◽  
High Energy ◽  
Lateral Distribution ◽  
Energy Spectra ◽  
Recent Experimental Data ◽  
Air Showers ◽  
Shower Size ◽  
Primary Composition

The energy spectra and the lateral distribution of muons in cosmic-ray air showers, in the size range 104–106 particles as measured by two magnetic spectrographs each of full detection efficiency for muons in the energy range 2.5–500 GeV, are presented along with the derived muon size vs. shower size results. Comparisons with similar recent experimental data and calculations are given to infer the cosmic-ray primary composition.

PERFORMANCE STUDIES OF THE DØ PRESHOWER DETECTOR

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 1129-1131
Author(s):  
S. HOU
Keyword(s):  
Spatial Resolution ◽  
Performance Studies ◽  
Detection Efficiency ◽  
Cosmic Ray ◽  
Noise Contamination

The DØ preshower detector has been tested with cosmic ray muons. We report results on the light yields for minimum ionizing particles and the spatial resolution. The detection efficiency and noise contamination are also investigated.

scholarly journals Evaluation of Cosmic Ray Rejection Algorithms on Single-Shot Exposures

2005 ◽  
Vol 22 (3) ◽  
pp. 249-256 ◽  
Author(s):  
Catherine L. Farage ◽  
Kevin A. Pimbblet
Keyword(s):  
Cosmic Rays ◽  
Detection Efficiency ◽  
Cosmic Ray ◽  
Real Data ◽  
Single Shot ◽  
Detection Rates ◽  
Data Output ◽  
Real Objects ◽  
Astronomical Images

AbstractTo maximise data output from single-shot astronomical images, the rejection of cosmic rays is important. We present the results of a benchmark trial comparing various cosmic ray rejection algorithms. The procedures assess relative performances and characteristics of the processes in cosmic ray detection, rates of false detections of true objects, and the quality of image cleaning and reconstruction. The cosmic ray rejection algorithms developed by Rhoads (2000, PASP, 112, 703), van Dokkum (2001, PASP, 113, 1420), Pych (2004, PASP, 116, 148), and the IRAF task XZAP by Dickinson are tested using both simulated and real data. It is found that detection efficiency is independent of the density of cosmic rays in an image, being more strongly affected by the density of real objects in the field. As expected, spurious detections and alterations to real data in the cleaning process are also significantly increased by high object densities. We find the Rhoads' linear filtering method to produce the best performance in the detection of cosmic ray events; however, the popular van Dokkum algorithm exhibits the highest overall performance in terms of detection and cleaning.

Fresnel interference in point-projection imaging of purple membrane

1995 ◽  
Vol 53 ◽  
pp. 846-847
Author(s):  
X. Zhang ◽  
J. Spence ◽  
W. Qian ◽  
D. Taylor ◽  
K. Taylor
Keyword(s):  
Detection Efficiency ◽  
Mean Free Path ◽  
Purple Membrane ◽  
Unit Cell Dimension ◽  
Experimental Point ◽  
Membrane Thickness ◽  
Low Energies ◽  
Channel Plate ◽  
Point Projection ◽  
Inelastic Mean Free Path

Experimental point-projection shadow microscope (PPM) images of uncoated, unstained purple membrane (PM, bacteriorhodopsin, a membrane protein from Halobacterium holobium) were obtained recently using 100 volt electrons. The membrane thickness is about 5 nm and the hexagonal unit cell dimension 6 nm. The images show contrast around the edges of small holes, as shown in figure 1. The interior of the film is opaque. Since the inelastic mean free path for 100V electrons in carbon (about 6 Å) is much less than the sample thickness, the question arises that how much, if any, transmission of elastically scattered electrons occurs. A large inelastic contribution is also expected, attenuated by the reduced detection efficiency of the channel plate at low energies. Quantitative experiments using an energy-loss spectrometer are planned. Recently Shedd has shown that at about 100V contrast in PPM images of thin gold films can be explained as Fresnel interference effects between different pinholes in the film, separated by less than the coherence width.

Effect of energy filtering on micro-diffraction in the SEM

1994 ◽  
Vol 52 ◽  
pp. 604-605
Author(s):  
James F. Mancuso ◽  
Leo A. Fama ◽  
William B. Maxwell ◽  
Jerry L. Lehman ◽  
Hasso Weiland ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Ccd Camera ◽  
High Gain ◽  
Microchannel Plate ◽  
Electrostatic Energy ◽  
Energy Filtering ◽  
Electron Channelling ◽  
Low Energy Electrons ◽  
Low Sensitivity ◽  
Angular Field Of View

Micro-diffraction based crystallography is essential to the design and development of many classes of ‘crafted materials’. Although the scanning electron microscope can provide crystallographic information with high spatial resolution, its current utility is severely limited by the low sensitivity of existing diffraction techniques (ref: Dingley). Previously, Joy showed that energy filtering increased contrast and pattern visibility in electron channelling. This present paper discribes the effect of energy filtering on EBSP sensitivity and backscattered SEM imaging.The EBSP detector consisted of an electron energy filter, a microchannel plate detector, a phosphor screen, optical coupler, and a slow scan CCD camera. The electrostatic energy filter used in this experiment was constructed as a cone with 5 coaxial electrodes. The angular field-of-view of the filter was approximately 38°. The microchannel plate, which was the initial sensing component, had high gain and had 50% to 80% detection efficiency for the low energy electrons that passed through the retarding field filter.

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