scholarly journals Experimental Facility at A2 Collaboration (MAINZ) for Photoproduction reaction

2016 ◽  
Vol 3 (1) ◽  
pp. 73
Author(s):  
Kabi Raj Bantawa
Keyword(s):  
Continuous Wave ◽  
Accelerate Electron ◽  
Particle Identification ◽  
Experimental Program ◽  
Experimental Facility ◽  
Highly Sensitive ◽  
Race Track ◽  
Multiwire Proportional Chambers ◽  
Bremsstrahlung Process ◽  
Photoproduction Reaction

<p>Since 20 years, a very successful experimental program with real photons has been achieved at the Mainz Microtron (MAMI) facility. The A2 Collaboration at MAINZ is a unique place for the experimental facility of photoproduction reaction. The combination of highly sensitive photo spectrometers Crystal Ball and TAPS as forward wall detector along with particle identification detector and Multiwire proportional chambers as inner wall detectors provide the high precision of the measurement. MAMI-C, which consists of there Race Track Microtrons (RTMs) with the Harmonic Double -Sided Microtron (HDSM) is an intense, stable and continuous-wave accelerator to accelerate electron to 1.5 GeV. This electron beam is responsible to produce real photons via bremsstrahlung process at Glasgow Photon Tagger. A major part of the ongoing and future programme at MAMI will exploit polarised nucleon targets.</p><p>Journal of Nepal Physical Society Vol.3(1) 2015: 73-81</p>

scholarly journals Design A Sensor Mach Zender Interferometer for the Detection of Chemical and Organic Substances Present In Food and Health Drinks

2019 ◽  
Vol 8 (6) ◽  
pp. 4726-4730
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Model Simulation ◽  
Soft Drink ◽  
Cmos Technology ◽  
Experimental Program ◽  
Organic Substances ◽  
Highly Sensitive ◽  
Crystal Model ◽  
Small Change

This Paper includes the nano cavity implementation of the biosensors in the detection of any chemical analyte and pesticide. Chemical, organic substances or any biological analytes are deemed to be present in any food or soft drink. Detection of these kinds of analytes are the potential risk. Photonic Crystals are rapid and precise to reach the sky for the next future. The photonic crystal model simulation is performed using Beam Propagation technology, with change in the refractive index in one selected arm. Therefore the designed MZI acts as a bio sensing device to detect any kind of chemical, bio analyte and organic substances that are present in different food. MZI has many advantages in photonic crystal with the use of least instrument and ready to be compatible with CMOS technology. The experimental program is observed for minute change in refractive index, in this work. Mach Zender Interferometer shall behave as sensor for small change in refractive index of pesticide value and observed power and intensity thus will be accounted. Indicates that it is highly sensitive for the changes in refractive index and in turn it can differentiate between normal food which do not contain any chemical and pesticide present in food

Looped Sensors to Measure Differential Settlement by Time Domain Reflectometry

2013 ◽  
Vol 639-640 ◽  
pp. 1148-1154
Author(s):  
Zheng Lai Xu ◽  
Charles E. Pierce
Keyword(s):  
Time Domain ◽  
Time Domain Reflectometry ◽  
Measuring System ◽  
Experimental Program ◽  
Highly Sensitive ◽  
Subsidence Zone ◽  
Soil Settlement ◽  
Data Points ◽  
Instruments And Techniques ◽  
Engineering Practices

Differential ground settlement is a key parameter to be monitored in engineering practices. The common instruments and techniques available for surface and subsurface settlement measuring, such as surface surveying, settlement platforms, extensometer, inclinometers, and so on, provide point-specific measurements. The number of data points obtained by these methods is pre-determined by the number of the measuring points, and hence the spatial resolution of the measuring system is limited. This paper presents the development of a tension-sensitive time domain reflectometry (TDR) sensor and the experimental program to evaluate its performance for monitoring soil settlement. Testing results show that the looped TDR cable is highly sensitive to tension and effective in detecting subsidence zone in sand.

scholarly journals Design, Fabrication and Testing of a High-Sensitive Fibre Sensor for Tip Clearance Measurements

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2610 ◽  
Author(s):  
Gaizka Durana ◽  
Josu Amorebieta ◽  
Ruben Fernandez ◽  
Josu Beloki ◽  
Eneko Arrospide ◽  
...  
Keyword(s):  
Optical Sensor ◽  
Fibre Bundle ◽  
Single Mode ◽  
Measurement Range ◽  
Tip Clearance ◽  
Experimental Program ◽  
Linear Calibration ◽  
Distance Measurements ◽  
Reflected Light ◽  
Highly Sensitive

A highly sensitive fibre bundle-based reflective optical sensor has been designed and fabricated for Tip Clearance measurements in a turbine rig. The sensor offers high spatial and temporal resolution. The sensor probe consists of a single-mode transmitting fibre and two concentric rings of receiving multimode fibres that collect reflected light in a differential detection gain configuration, yielding a highly linear calibration curve for distance measurements. The clearance measurement range is approximately 2 mm around the central point fixed at 3.2 mm from the probe tip, and the sensitivity of the probe is 61.73 mm−1. The fibre bundle has been designed to ensure that the distance security specifications required for the experimental program of the turbine are met. The optical sensor has operated under demanding conditions set by the blade and casing design. The experimental results obtained so far are promising and lead us to think that the optical sensor has great potential for online clearance measurements with high precision.

scholarly journals Tracking system performance of the BM@N experiment

2019 ◽  
Vol 214 ◽  
pp. 02021
Author(s):  
Mikhail Kapishin ◽  
Vasilisa Lenivenko ◽  
Vladimir Palichik ◽  
Gleb Pokatashkin ◽  
Igor Rufanov ◽  
...  
Keyword(s):  
Tracking System ◽  
Nuclear Research ◽  
Particle Identification ◽  
Fixed Target ◽  
Drift Chambers ◽  
Target Experiment ◽  
Multiwire Proportional Chambers ◽  
Main Detector ◽  
Particles Trajectories ◽  
The Magnetic Field

The Baryonic Matter at Nuclotron (BM@N) experiment represents the first phase of the Nuclotron-based Ion Collider Facility (NICA), a mega-science project at the Joint Institute for Nuclear Research. It is a fixed target experiment built for studying nuclear matter in conditions of extreme density and temperature. The tracking system of the BM@N experiment consists of three main detector systems: Multiwire Proportional Chambers situated before the magnet, Gas Electron Multipliers placed inside the magnet and Drift Chambers placed after the magnet. These systems provide the reconstruction of charged particles’ trajectories and their momentum in the magnetic field. This information is further used by Time of Flight detectors for the particle identification procedure. The system’s performance is reviewed and the spatial resolutions along with efficiencies of the detectors are estimated using the data collected in the recent physics runs of the Nuclotron.

scholarly journals Ultra-Highly Sensitive Hydrogen Chloride Detection Based on Quartz-Enhanced Photothermal Spectroscopy

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3563
Author(s):  
Yufei Ma ◽  
Ziting Lang ◽  
Ying He ◽  
Shunda Qiao ◽  
Yu Li
Keyword(s):  
Hydrogen Chloride ◽  
Continuous Wave ◽  
Second Harmonic ◽  
Modulation Depth ◽  
High Sensitivity ◽  
Integration Time ◽  
Wavelength Modulation ◽  
Photothermal Spectroscopy ◽  
Highly Sensitive ◽  
Hcl Concentration

Combining the merits of non-contact measurement and high sensitivity, the quartz-enhanced photothermal spectroscopy (QEPTS) technique is suitable for measuring acid gases such as hydrogen chloride (HCl). In this invited paper, we report, for the first time, on an ultra-highly sensitive HCl sensor based on the QEPTS technique. A continuous wave, distributed feedback (CW-DFB) fiber-coupled diode laser with emission wavelength of 1.74 µm was used as the excitation source. A certified mixture of 500 ppm HCl:N2 was adapted as the analyte. Wavelength modulation spectroscopy was used to simplify the data processing. The wavelength modulation depth was optimized. The relationships between the second harmonic (2f) amplitude of HCl-QEPTS signal and the laser power as well as HCl concentration were investigated. An Allan variance analysis was performed to prove that this sensor had good stability and high sensitivity. The proposed HCl-QEPTS sensor can achieve a minimum detection limit (MDL) of ~17 parts per billion (ppb) with an integration time of 130 s. Further improvement of such an HCl-QEPTS sensor performance was proposed.

scholarly journals Surface plasmon induced spot and line formation at interfaces of ITO coated LiNbO3 slabs and gigantic nonlinearity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zuoren Xiong ◽  
Xinyan Ma ◽  
Yanbo Pei ◽  
Yingbin Zhang ◽  
Hua Zhao
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Nonlinear Effect ◽  
Continuous Wave ◽  
Laser Light ◽  
Continuous Wave Laser ◽  
Line Formation ◽  
Large Gradient ◽  
Highly Sensitive ◽  
Wave Laser

AbstractRemarkable spots and lines were clearly observed at the two interfaces of indium-tin-oxide coated Z-cut Fe-doped lithium noibate plates under illumination by milliwatt continuous-wave laser light; this occurred because of the visible surface plasmons (SPs) supported by the promising non-metal plasmonic system. The intriguing observations are here explained via the SP-strengthened nonlinear effect, through consideration of the electrostatic field (which is comparable to the atomic field) and its large gradient; this hints at a promising, highly sensitive plasmonic system. The gigantic nonlinear effect discussed in this paper should be ubiquitously existed in many oxide ferroelectric/semiconductor combinations and is promising for visible plasmonic applications.

scholarly journals The Super C-τ Factory particle identification system options

2019 ◽  
Vol 212 ◽  
pp. 01012 ◽  
Author(s):  
A.Yu. Barnyakov ◽  
M.Yu. Barnyakov ◽  
V.S Boborovnikov ◽  
A.R. Buzykaev ◽  
A.V. Bykov ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Center Of Mass ◽  
Particle Identification ◽  
Experimental Program ◽  
Budker Institute ◽  
Identification System ◽  
Electron Positron ◽  
Beam Experiment ◽  
Detector Threshold ◽  
Better Than

The Super C-τ (SCT) Factory at Novosibirsk is a project of new colliding beam experiment proposed in Budker Institute of Nuclear Physics. Electron-positron collider based on Crab-Waist technique for operation energy range 2–5 GeV in center of mass is suggested. The luminosity up to 1035cm−1s−1 (in 100 times higher than in operated today experiments in this energy region) is expected. To perform broad experimental program of the project successfully the excellent particle identification (PID) system is needed. A number of options are under consideration. Three of them are described in the paper: Focusing Aerogel RICH (FARICH) detector, threshold Cherenkov counters based on ASHIPH (Aerogel SHifter PHotomultiplier) technique with 6000 litres of aerogel of two refractive indexes and time-of-flight counters with TOP (Time of Propagation) approach with time resolution better than 30 ps. Comparison of PID capabilities with help of parametric simulation is given.

scholarly journals Purity Analysis of Gases Used in the Preparation of Reference Gas Standards Using a Versatile OPO-Based CRDS Spectrometer

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Stefan Persijn
Keyword(s):  
Greenhouse Gases ◽  
Wavelength Range ◽  
High Power ◽  
Continuous Wave ◽  
Highly Sensitive ◽  
Purity Analysis ◽  
Wide Wavelength Range ◽  
Gas Standards

Preparation of accurate reference gas standards at low amount fractions such as for greenhouse gases requires highly sensitive instrumentation to determine the purity of the gases used in the preparation. For this purpose, a versatile CRDS spectrometer has been constructed at VSL based on high-power, continuous wave OPOs covering a very wide wavelength range of 2.3–5.1 µm. Due to the use of passivated materials, the spectrometer is also suitable for the measurement of reactive impurities. Details of the spectrometer are presented together with several examples of purity analysis.

New and highly sensitive continuous-wave near-infrared spectrophotometer with multiple detectors

1998 ◽  
Author(s):  
Marco C. van der Sluijs ◽  
Willy N. Colier ◽  
Ralph J. F. Houston ◽  
Berend Oeseburg
Keyword(s):  
Near Infrared ◽  
Continuous Wave ◽  
Highly Sensitive ◽  
Infrared Spectrophotometer ◽  
Multiple Detectors
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