NDLI: Design, development, and results from a charge-collector diagnostic for a toroidal electron plasma experiment.

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Invited Article: A compact optically coherent fiber frequency comb.

A peripheral component interconnect express-based scalable and highly integrated pulsed spectrometer for solution state dynamic nuclear polarization.

A spectroelectrochemical cell for ultrafast two-dimensional infrared spectroscopy.

Suppression of vapor cell temperature error for spin-exchange-relaxation-free magnetometer.

Continuous wave Cs diode pumped alkali laser pumped by single emitter narrowband laser diode.

A novel vacuum spectrometer for total reflection x-ray fluorescence analysis with two exchangeable low power x-ray sources for the analysis of low, medium, and high Z elements in sequence.

Growth of optical-quality anthracene crystals doped with dibenzoterrylene for controlled single photon production.

A versatile setup using femtosecond adaptive spectroscopic techniques for coherent anti-Stokes Raman scattering.

A gas ionisation detector in the axial (Bragg) geometry used for the time-of-flight elastic recoil detection analysis.

Avalanche photodiode based time-of-flight mass spectrometry.

Optimizing the position resolution of a Z-stack microchannel plate resistive anode detector for low intensity signals.

The ASACUSA Micromegas Tracker: A cylindrical, bulk Micromegas detector for antimatter research.

Infrared imaging diagnostics for intense pulsed electron beam.

Muon detection studied by pulse-height energy analysis: Novel converter arrangements.

CR-39 track detector calibration for H, He, and C ions from 0.1-0.5 MeV up to 5 MeV for laser-induced nuclear fusion product identification.

Electron string ion sources for carbon ion cancer therapy accelerators.

The relationship between visible light emission and species fraction of the hydrogen ion beams extracted from 2.45 GHz microwave discharge.

Detection efficiency of microchannel plates for e(-) and π(-) in the momentum range from 17.5 to 345 MeV/c.

Fast and efficient charge breeding of the Californium rare isotope breeder upgrade electron beam ion source.

Measurements of electron density and temperature profiles in plasma produced by Nike KrF laser for laser plasma instability research.

Measurement of eddy-current distribution in the vacuum vessel of the Sino-UNIted Spherical Tokamak.

Radial and poloidal correlation reflectometry on Experimental Advanced Superconducting Tokamak.

Design, development, and results from a charge-collector diagnostic for a toroidal electron plasma experiment.

Development of a high-speed impedance measurement system for dual-frequency capacitive-coupled pulsed-plasma.

A fibre based triature interferometer for measuring rapidly evolving, ablatively driven plasma densities.

Measurements of high energy photons in Z-pinch experiments on primary test stand.

A compact, coaxial shunt current diagnostic for X pinches.

Cherenkov neutron detector for fusion reaction and runaway electron diagnostics.

Imaging free-falling particles for multipoint measurement of plasma fluctuations.

Performance of JT-60SA divertor Thomson scattering diagnostics.

Two-dimensional spatiotemporal focusing of femtosecond pulses and its applications in microscopy.

Electric field stimulation setup for photoemission electron microscopes.

Synthetic aperture imaging for multilayer cylindrical object using an exterior rotating transducer.

Correction of the equilibrium temperature caused by slight evaporation of water in protein crystal growth cells during long-term space experiments at International Space Station.

An ultra-low noise optical head for liquid environment atomic force microscopy.

Contact resonance atomic force microscopy imaging in air and water using photothermal excitation.

Choice of tip, signal stability, and practical aspects of piezoresponse-force-microscopy.

A laboratory 8 keV transmission full-field x-ray microscope with a polycapillary as condenser for bright and dark field imaging.

Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effect using a seeded free electron laser.

High resolution electron energy loss spectroscopy with two-dimensional energy and momentum mapping.

Fabrication of novel cryomill for synthesis of high purity metallic nanoparticles.

Spatially confined low-power optically pumped ultrafast synchrotron x-ray nanodiffraction.

Coupling an electrospray source and a solids probe/chemical ionization source to a selected ion flow tube apparatus.

Facile time-of-flight methods for characterizing pulsed superfluid helium droplet beams

Catalyst synthesis and evaluation using an integrated atomic layer deposition synthesis-catalysis testing tool.

Development of a prototype Open-close positron emission tomography system.

Investigation of mechanical properties of cryogenically treated music wire.

A phasemeter concept for space applications that integrates an autonomous signal acquisition stage based on the discrete wavelet transform.

Non-contact method for characterization of small size thermoelectric modules.

Material selection of a ferrimagnetic loaded coaxial delay line for phasing gyromagnetic nonlinear transmission lines.

Electron temperature and density probe for small aeronomy satellites.

Development of electrical-erosion instrument for direct write micro-patterning on large area conductive thin films.

A gigawatt level repetitive rate adjustable magnetic pulse compressor.

Gigawatt-class radiation generated by a Ka-band overmoded Cherenkov-type high power millimeter wave generator.

In situ observation the interface undercooling of freezing colloidal suspensions with differential visualization method.

An improved algorithm of temperature compensation for a near infrared multiple-acquisition system based on two-dimensional regression analysis.

Comparative study of 0° X-cut and Y + 36°-cut lithium niobate high-voltage sensing.

Rate dependent direct inverse hysteresis compensation of piezoelectric micro-actuator used in dual-stage hard disk drive head positioning system.

Development of a novel type of hybrid non-symmetric flexure hinges.

Fast and robust control of nanopositioning systems: Performance limits enabled by field programmable analog arrays.

Optimizing the performance of bandpass photon detectors for inverse photoemission: Transmission of alkaline earth fluoride window crystals.

Experimental rig to estimate the coefficient of friction between tire and surface in airplane touchdown simulations.

Single proton counting at the RIKEN cell irradiation facility.

Development and testing of an active high voltage saturation probe for characterization of ultra-high voltage silicon carbide semiconductor devices.

Fabrication of high-aspect-ratio platinum probes by two-step electrochemical etching.

Online monitoring of oil film using electrical capacitance tomography and level set method.

Design and application of permanent magnet flux sources for mechanical testing of magnetoactive elastomers at variable field directions.

Feasibility study on signal separation for spontaneous alpha decay in LaBr3: Ce scintillator by signal peak-to-charge discrimination.

Logarithmic derivative method and system for capacitance measurement.

A novel apparatus for in situ measurement of thermal conductivity of hydrate-bearing sediments.

Precision measurement of refractive index of air based on laser synthetic wavelength interferometry with Edlén equation estimation.

The large volume press facility at ID06 beamline of the European synchrotron radiation facility as a High Pressure-High Temperature deformation apparatus.

A lab-based ambient pressure x-ray photoelectron spectrometer with exchangeable analysis chambers.

Webcam autofocus mechanism used as a delay line for the characterization of femtosecond pulses.

Note: Effective measurement of retained I(c) in evaluating electromechanical properties of high temperature superconductor tapes by the voltage tap clipping technique.

Note: Electrochemical cell for in operando X-ray diffraction measurements on a conventional X-ray diffractometer.

Note: Compact and light displacement sensor for a precision measurement system in large motion.

Note: Improving long-term stability of hot-wire anemometer sensors by means of annealing.

Note: A simple image processing based fiducial auto-alignment method for sample registration.

Note: Double-beveled multilayer stagger-split die for a large volume high-pressure apparatus.

Note: A disposable x-ray camera based on mass produced complementary metal-oxide-semiconductor sensors and single-board computers.

Note: An improved calibration system with phase correction for electronic transformers with digital output.

Note: Fabrication of resolution target for super-resolution microscopy.

Note: A novel method for generating multichannel quasi-square-wave pulses.

Publisher's Note: 'New developments in micro-X-ray diffraction and X-ray absorption spectroscopy for high-pressure research at 16-BM-D at the Advanced Photon Source' [Rev. Sci. Instrum. 86, 072205 (2015)].

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Design, development, and results from a charge-collector diagnostic for a toroidal electron plasma experiment.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Pahari, Sambaran Rathod, Karan Lachhvani, Lavkesh Chattopadhyay, P. K. Bajpai, Manu Yeole, Yogesh
Description	Country affiliation: India Author Affiliation: Pahari S ( Bhabha Atomic Research Centre, Visakhapatnam-530012, India.); Lachhvani L ( Institute for Plasma Research, Gandhinagar-382428, India.); Bajpai M ( Institute for Plasma Research, Gandhinagar-382428, India.); Rathod K ( Institute for Plasma Research, Gandhinagar-382428, India.); Yeole Y ( Institute for Plasma Research, Gandhinagar-382428, India.); Chattopadhyay PK ( Institute for Plasma Research, Gandhinagar-382428, India.)
Abstract	A suitable charge-collector has been designed and developed to estimate charge-content of electron plasmas in a Small Aspect Ratio Toroidal Experiment in a C-shaped trap (SMARTEX-C). The electrons are periodically injected and held in the trap with the aid of electrostatic end-fields and a toroidal magnetic field. After a preset 'hold' time, the trapped charges are dumped onto a grounded collector (by gating it). As the charges flow along the magnetic field lines onto the collector, the integrated current gives the charge-content of the plasma at the instant of dump. In designing such a charge collector, several challenges peculiar to the geometry of the trap and the nature of the plasma had to be addressed. Instantaneous charge measurements synchronised with the E × B drift of the plasma, along with fast transit times of electrons to the collector (few 100 ns or less) (due to the low aspect ratio of the trap) essentially require fast gating of the collector. The resulting large capacitive transients alongside low charge content (few nC) of such plasmas further lead to increasing demands on response and sensitivity of the collector. Complete cancellation of such transients is shown to be possible, in principle, by including the return path in our measurement circuit but the 'non-neutrality' of the plasma acts as a further impediment. Ultimately, appropriate shielding and measurement circuits allow us to (re)distribute the capacitance and delineate the paths of these currents, leading to effective cancellation of transients and marked improvement in sensitivity. Improved charge-collector has thus been used to successfully estimate the time evolution of total charge of the confined electron plasma in SMARTEX-C.
ISSN	00346748
Issue Number	8
Journal	Review of Scientific Instruments
Volume Number	86
e-ISSN	10897623
Language	English
Publisher	American Institute of Physics
Publisher Date	2015-08-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Instrumentation

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