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

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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.

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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.

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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.

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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.

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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.

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

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

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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.

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Electron temperature and density probe for small aeronomy satellites.

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

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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.

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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.

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

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Park, Gijung Cho, Gunhee Lee, Jeongbeom Chang, Hongyoung Min, Kyoungwook Lee, Hohyoung Lee, Youngwook Kim, Hanam Han, Yunseok
Description	Country affiliation: South Korea Author Affiliation: Lee H ( Department of Physics, Natural Science Building, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea.); Lee J ( Department of Physics, Natural Science Building, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea.); Park G ( Department of Physics, Natural Science Building, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea.); Han Y ( PLASMART, 188 Tekeuno2-ro, Yuseong-gu, Daejeon 305-500, South Korea.); Lee Y ( PLASMART, 188 Tekeuno2-ro, Yuseong-gu, Daejeon 305-500, South Korea.); Cho G ( PLASMART, 188 Tekeuno2-ro, Yuseong-gu, Daejeon 305-500, South Korea.); Kim H ( PLASMART, 188 Tekeuno2-ro, Yuseong-gu, Daejeon 305-500, South Korea.); Chang H ( Department of Physics, Natural Science Building, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea.); Min K ( Department of Physics, Natural Science Building, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea.)
Abstract	A high-speed impedance measurement system was developed, which enables the measurement of various characteristics of CW and pulsed plasmas with time resolution of less than a microsecond. For this system, a voltage and current sensor is implemented in a printed circuit board to sense the radio frequency signals. A digital board, which has a high-speed analog to digital converter and a field-programmable gate-array, is used to calculate the impedance of the signal. The final output of impedance is measured and stored with a maximum speed of 3 Msps. This sensor system was tested in a pulsed-plasma by applying it to the point between the matching box and the plasma chamber. The experimental equipment was constructed connecting the matching box, a 13.56 MHz generator, a 2 MHz generator that produced pulsed power, and a pulse-signal generator. From the temporal behavior of the measured impedance, we were able to determine the time intervals of transient states, especially of the initial active state. This information can be used to set the pulse frequency and duty for plasma processing.
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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