RSI Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

Mar 1987

Volume 58, Issue 3, pp. 339-483

Page 1 of 2 Pages Next Page | Jump to Page

High field strength wedged‐pole hybrid undulator

D. C. Quimby and A. L. Pindroh

Rev. Sci. Instrum. 58, 339 (1987); http://dx.doi.org/10.1063/1.1139284 (7 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
The wedged‐pole concept is introduced as a means for enhancing the field strength and field quality of the rare‐earth permanent magnet hybrid undulator. The wedged‐pole configuration results in higher on‐axis field strength since it causes the magnet surface which faces the gap to be driven to the full magnet coercivity, Hc. Pole tip saturation is avoided by angular wedging of the poles and magnets to provide larger pole tip area without sacrificing magnet volume. The advantages of the wedged‐pole concept are investigated for an example case with a gap to wavelength ratio of 0.22 and SmCo5 magnets. It is found that the field strength in the fundamental can be improved by as much as 15%. Alternatively, the field quality can be enhanced by operation of the poles far from saturation without loss of field strength. An additional benefit is reduction of the harmonic content in the field distribution.
Show PACS
07.55.Db Generation of magnetic fields; magnets
85.70.-w Magnetic devices
41.60.Cr Free-electron lasers
41.75.Fr Electron and positron beams

Polarization spectrophotometer for measurements of both polarized emission and excitation spectra

Okiyasu Shimizu and Jun Watanabe

Rev. Sci. Instrum. 58, 346 (1987); http://dx.doi.org/10.1063/1.1139285 (4 pages)

Full Text: | Download PDF

Show Abstract
The construction of a polarization spectrophotometer coupled with a microcomputer is described. The new spectrophotometer enables the continuous recording of a polarized emission spectrum of luminescent molecules as well as a polarized excitation spectrum. The instrument’s optics were designed to separately detect each polarized component of the emission utilizing an optical fiber bundle composed of two blanches. The use of the optical bundle, along with phase‐sensitive detectors, permits precise polarization measurements at low signal‐to‐noise ratios and, at the same time, affords a high degree of immunity from artifacts arising from the measurement of the polarized spectrum of emission. Data acquisition and various manipulations, such as instrument response and polarization calculations, were performed by a Fujitsu Micro 8 microcomputer equipped with an 8‐bit analog‐to‐digital converter. Several examples of the instrument’s performance are provided including a polarized phosphorescence emission spectrum of 0.05 mM indole in ethylene glycol–water (v/v=1) at 77 K.
Show PACS
07.60.Dq Photometers, radiometers, and colorimeters
78.55.Bq Liquids

Quasi‐elastic light scattering: Signal storage, correlation, and spectrum analysis under control of an 8‐bit microprocessor

Otto Glatter, Heribert Fuchs, Christian Jorde, and Wolf‐Dieter Eigner

Rev. Sci. Instrum. 58, 350 (1987); http://dx.doi.org/10.1063/1.1139286 (7 pages) | Cited 5 times

Full Text: | Download PDF

Show Abstract
The microprocessor of an 8‐bit PC system is used as a central control unit for the acquisition and evaluation of data from quasi‐elastic light scattering experiments. Data are sampled with a width of 8 bits under control of the CPU. This limits the minimum sample time to 20 μs. Shorter sample times would need a direct memory access channel. The 8‐bit CPU can address a 64‐kbyte RAM without additional paging. Up to 49 000 sample points can be measured without interruption. After storage, a correlation function or a power spectrum can be calculated from such a primary data set. Furthermore access is provided to the primary data for stability control, statistical tests, and for comparison of different evaluation methods for the same experiment. A detailed analysis of the signal (histogram) and of the effect of overflows is possible and shows that the number of pulses but not the number of overflows determines the error in the result. The correlation function can be computed with reasonable accuracy from data with a mean pulse rate greater than one, the power spectrum needs a three times higher pulse rate for convergence. The statistical accuracy of the results from 49 000 sample points is of the order of a few percent. Additional averages are necessary to improve their quality. The hardware extensions for the PC system are inexpensive. The main disadvantage of the present system is the high minimum sampling time of 20 μs and the fact that the correlogram or the power spectrum cannot be computed on‐line as it can be done with hardware correlators or spectrum analyzers. These shortcomings and the storage size restrictions can be removed with a faster 16/32‐bit CPU.
Show PACS
07.05.Hd Data acquisition: hardware and software
07.05.Kf Data analysis: algorithms and implementation; data management
07.05.Rm Data presentation and visualization: algorithms and implementation
07.60.-j Optical instruments and equipment
07.05.Bx Computer systems: hardware, operating systems, computer languages, and utilities
29.40.Mc Scintillation detectors

Compensating calorimeter for absorption measurements of transparent materials for IR optics

G. Gafni, A. Eliahu, and H. Galron

Rev. Sci. Instrum. 58, 357 (1987); http://dx.doi.org/10.1063/1.1139287 (2 pages) | Cited 1 time

Full Text: | Download PDF

Show Abstract
A new method for the measurement of absorption coefficients of IR transparent materials is described. The method does not require thermal insulation and the measurement is made with the sample at room temperature. A heat pump removes the heat generated by absorption and keeps the sample temperature constant. The amount of heat removed is estimated from a calibration graph. The new method was used to measure the absorption coefficient of optical germanium.
Show PACS
07.60.-j Optical instruments and equipment
07.20.Fw Calorimeters
42.87.-d Optical testing techniques

High transmission polarization analyzer for Lyman‐α radiation

H. Winter and H. W. Ortjohann

Rev. Sci. Instrum. 58, 359 (1987); http://dx.doi.org/10.1063/1.1139288 (4 pages) | Cited 16 times

Full Text: | Download PDF

Show Abstract
We report on an analyzer for elliptically polarized Lyman‐α radiation (λ=121.6 nm) which has a high transmission (14%) and can be used in ultrahigh vacuum. The analyzer consists of a pile of four MgF2 plates and a MgF2 quarter‐wave plate for Lyman‐α light. We discuss examples for the application of this device by measurements of polarized Lyman‐α light emitted after ion‐atom and ion‐surface collisions.
Show PACS
07.60.Fs Polarimeters and ellipsometers
42.79.Ci Filters, zone plates, and polarizers
78.20.Ek Optical activity

Pulse radiolysis equipment: A setup for simultaneous multiwavelength kinetic spectroscopy

Manfred Saran, Georg Vetter, Michael Erben‐Russ, Robert Winter, Alf Kruse, Christa Michel, and Wolf Bors

Rev. Sci. Instrum. 58, 363 (1987); http://dx.doi.org/10.1063/1.1139289 (6 pages) | Cited 5 times

Full Text: | Download PDF

Show Abstract
A setup for pulse radiolysis experiments is described consisting of the following main components: an array of 15 photomultipliers attached to a spectrograph (allowing 4032 spectra to be recorded with a time resolution of 500 ns per spectrum), self‐regulating high‐voltage supply for the photomultipliers, computer‐controlled solution mixing and dispensing system, and provisions for continuous dose variation of the FEBETRON‐accelerator electron beam. The general performance of the system is discussed and construction or electronic details are given for special components.
Show PACS
85.60.Ha Photomultipliers; phototubes and photocathodes
82.30.-b Specific chemical reactions; reaction mechanisms
82.45.-h Electrochemistry and electrophoresis
07.57.Kp Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors

Compact axial flow gas transport system for a coaxial CO2 discharge laser

V. A. Seguin, H. J. J. Seguin, and C. E. Capjack

Rev. Sci. Instrum. 58, 369 (1987); http://dx.doi.org/10.1063/1.1139290 (5 pages)

Full Text: | Download PDF

Show Abstract
The design and construction of an axial flow gas transport system for a coaxial CO2 laser discharge is described. The system features a novel annular flow geometry, which yields a compact, cylindrical package. Flow velocities of up to 50 m/s have been obtained in the device. Measurements of active medium working temperature and gain profiles are also presented.
Show PACS
42.60.By Design of specific laser systems
42.55.Lt Gas lasers including excimer and metal-vapor lasers
42.60.Da Resonators, cavities, amplifiers, arrays, and rings

Computer‐controlled Cauchois‐type x‐ray spectrometer

J. M. André, M. Kefi, A. Avila, P. Couillaux, and C. Bonnelle

Rev. Sci. Instrum. 58, 374 (1987); http://dx.doi.org/10.1063/1.1139291 (5 pages) | Cited 3 times

Full Text: | Download PDF

Show Abstract
A laboratory x‐ray spectrometer designed for routine analysis in the 15–60‐keV spectral range is described. It consists of a 40‐cm bent‐crystal transmission spectrometer in the Cauchois geometry, controlled by a microcomputer. The choice of the crystal analyzer and of the detection system is discussed. The instrument is well suited for large spectral range x‐ray absorption and emission spectroscopy (XAS, XES) and x‐ray source diagnostics.
Show PACS
07.85.-m X- and γ-ray instruments
52.70.La X-ray and γ-ray measurements
07.05.Bx Computer systems: hardware, operating systems, computer languages, and utilities

Cryogenically cooled K‐band high electron mobility transistor receiver for radio astronomical observation

T. Kasuga, R. Kawabe, M. Ishiguro, K. Yamada, H. Kurihara, M. Niori, and Y. Hirachi

Rev. Sci. Instrum. 58, 379 (1987); http://dx.doi.org/10.1063/1.1139292 (4 pages)

Full Text: | Download PDF

Show Abstract
A K‐band receiver using cooled high‐electron mobility‐transistor (HEMT) amplifiers was developed at the Nobeyama Radio Observatory (NRO). Remarkable reduction of receiver noise temperature Trec was obtained when it was cooled down to cryogenic temperature. The lowest Trec of 75 K was obtained at 23.4 GHz. This low noise characteristic reveals that the cooled HEMT amplifier is promising as a sensitive receiver for radio astronomical observations.
Show PACS
85.30.Tv Field effect devices
95.55.Qf Photometric, polarimetric, and spectroscopic instrumentation
07.57.Kp Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors

Experimental apparatus for measurements of electron impact excitation

G. P. Lafyatis, J. L. Kohl, and L. D. Gardner

Rev. Sci. Instrum. 58, 383 (1987); http://dx.doi.org/10.1063/1.1139293 (10 pages) | Cited 7 times

Full Text: | Download PDF

Show Abstract
An ion beam apparatus for the absolute measurement of collision cross sections in singly and multiply charged ions is described. An inclined electron and ion beams arrangement is used. Emitted photons from the decay of collision produced excited states are collected by a mirror and imaged onto a photomultiplier. Absolute measurements of the electron impact excitation of the 2s–2p transition in C3+ were used to demonstrate the reliability of the apparatus.
Show PACS
34.80.Dp Atomic excitation and ionization
52.70.Kz Optical (ultraviolet, visible, infrared) measurements
52.20.Fs Electron collisions
52.20.Hv Atomic, molecular, ion, and heavy-particle collisions

Circuit for simultaneous measurements of particle sizing interferometer signal characteristics

Jung‐Young Son and Thomas V. Giel

Rev. Sci. Instrum. 58, 393 (1987); http://dx.doi.org/10.1063/1.1139294 (8 pages)

Full Text: | Download PDF

Show Abstract
Particle sizing interferometer (PSI) signal characteristics, including visibility, peak intensity, number of Doppler signal cycles, and pedestal intensity, are examined for simultaneous use in particle sizing. Requirements are defined for circuitry which can simultaneously measure these characteristics and can be implemented in an existing PSI signal processor. The circuitry was implemented and tested using a rotating wheel and latex spheres. The experimental results confirm circuit reliability.
Show PACS
84.30.Sk Pulse and digital circuits
07.60.Ly Interferometers

New method for the measurement of wave potentials using varying emitted electron currents

Tadao Honzawa

Rev. Sci. Instrum. 58, 401 (1987); http://dx.doi.org/10.1063/1.1139295 (5 pages) | Cited 6 times

Full Text: | Download PDF

Show Abstract
A new method for the measurement of wave potentials using a low‐impedance emissive probe is studied. In this method, a wave potential is estimated not from a floating potential change but from a time‐varying emitted electron current from the probe. Results indicate that wave potentials observed in this way are usually considerably higher but more reliable than those obtained in a conventional high‐impedance emissive probe technique.
Show PACS
52.70.Ds Electric and magnetic measurements
52.70.Nc Particle measurements
52.35.Fp Electrostatic waves and oscillations (e.g., ion-acoustic waves)
52.35.Mw Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)

Technique for high‐pressure electrical conductivity measurement in diamond anvil cells at cryogenic temperatures

David Erskine, Peter Y. Yu, and Gerard Martinez

Rev. Sci. Instrum. 58, 406 (1987); http://dx.doi.org/10.1063/1.1139296 (6 pages) | Cited 44 times

Full Text: | Download PDF

Show Abstract
A technique is described for making four‐probe electrical conductivity measurements on bulk samples in a diamond anvil cell. The technique has been successfully applied up to 48 GPa and at temperatures below 4.2 K to measure the superconducting transition temperatures (Tc, of Pb, GaP, and Si. A method for analyzing the resistance versus temperature curve in the vicinity of the superconducting transition is also described. This method is applied to determine the pressure dependence of Tc in Si in the region where Tc varies rapidly with pressure.
Show PACS
07.50.-e Electrical and electronic instruments and components
07.35.+k High-pressure apparatus; shock tubes; diamond anvil cells
81.70.-q Methods of materials testing and analysis

Small diamond anvil high‐pressure cell for infrared spectroscopy of gas and liquid

N. Dahan, R. Couty, and A. Seijas

Rev. Sci. Instrum. 58, 412 (1987); http://dx.doi.org/10.1063/1.1139297 (3 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
A small diamond anvil cell (DAC) for pressure (6 GPa) and temperature (90–500 K) infrared spectroscopy is described. The purpose of this equipment is to investigate phase diagrams of fluids. Infrared spectra of freon (CHF2Cl+C2ClF3) in the liquid and solid phases are given here to illustrate the capability of this apparatus.
Show PACS
07.35.+k High-pressure apparatus; shock tubes; diamond anvil cells
07.57.Ty Infrared spectrometers, auxiliary equipment, and techniques
78.30.C- Liquids

NMR in a diamond anvil cell

Sam‐Hyeon Lee, K. Luszczynski, R. E. Norberg, and Mark S. Conradi

Rev. Sci. Instrum. 58, 415 (1987); http://dx.doi.org/10.1063/1.1139246 (3 pages) | Cited 23 times

Full Text: | Download PDF

Show Abstract
Techniques are presented for NMR measurements at high pressure in a diamond anvil cell. Two schemes of coupling radio frequency magnetic fields to the spins inside a metal gasket are described. As a demonstration of the techniques, the relaxation times T1 and T2 of methanol:ethanol solution have been measured to 52 kbar at room temperature.
Show PACS
07.57.Pt Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques
07.35.+k High-pressure apparatus; shock tubes; diamond anvil cells
81.70.-q Methods of materials testing and analysis
33.25.+k Nuclear resonance and relaxation

Computerized video analysis of tethered bacteria

Howard C. Berg, Steven M. Block, M. Patricia Conley, Andrew R. Nathan, John N. Power, and Alan J. Wolfe

Rev. Sci. Instrum. 58, 418 (1987); http://dx.doi.org/10.1063/1.1139247 (6 pages) | Cited 3 times

Full Text: | Download PDF

Show Abstract
When a flagellar filament of a bacterial cell such as Escherichia coli is fixed to a glass surface, the cell body spins alternately clockwise and counterclockwise at speeds of up to 15 Hz. In cells wild type for chemotaxis, reversals occur about once per second. A typical experiment on bacterial behavior involves data collected from as many as 30 such cells over periods of about an hour. A system is described that makes practical detailed analysis of such a large body of data. Microscopic fields, each containing many tethered cells, were recorded on VHS cassettes with a shuttered multiframe video camera. The tapes were played back through hardware that encoded information from successive images of a given cell and passed that information on to a minicomputer. This computer, following instructions provided in an editing session, identified intervals during which the cell was rotating clockwise, rotating counterclockwise, or remained stationary. Output files were generated listing the times at which transitions between these states occurred and the speeds of the cell averaged over successive time periods. This output was then combined with that from other cells and/or processed by various applications programs.
Show PACS
06.30.Gv Velocity, acceleration, and rotation
07.05.Bx Computer systems: hardware, operating systems, computer languages, and utilities

Ultrathin foils for Coulomb‐explosion experiments

G. Both, E. P. Kanter, Z. Vager, B. J. Zabransky, and D. Zajfman

Rev. Sci. Instrum. 58, 424 (1987); http://dx.doi.org/10.1063/1.1139248 (4 pages) | Cited 19 times

Full Text: | Download PDF

Show Abstract
We have examined the properties of very thin foils used for electron stripping of MeV molecular ions in Coulomb‐explosion experiments. Carbon foils with a nominal thickness of 0.2 μg/cm2 proved to be thicker than 1 μg/cm2. It was not possible to reduce their thickness by bombardment with 2‐MeV Kr+ or H2O+ ions or by heating to a red glow. We succeeded in producing Formvar films of about 0.5 μg/cm2, which are supported by a nickel mesh.
Show PACS
29.27.Eg Beam handling; beam transport
34.50.Fa Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)
29.25.Pj Polarized and other targets

Langmuir trough with four movable barriers

Kenjiro Miyano and Toshiteru Maeda

Rev. Sci. Instrum. 58, 428 (1987); http://dx.doi.org/10.1063/1.1139249 (8 pages) | Cited 6 times

Full Text: | Download PDF

Show Abstract
A new type Langmuir trough has been constructed, in which a monolayer on water is enclosed by four polytetrafluoroethylene (PTFE) tapes, independently movable, floating on the water. This arrangement allows a uniform film compression and a study of the stress inhomogeneity under purely compressional or shear strain. The system does not require a delicate water level adjustment. It is capable of sustaining a high surface pressure and easy to operate.
Show PACS
81.15.-z Methods of deposition of films and coatings; film growth and epitaxy
68.65.-k Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties
07.90.+c Other topics in instruments, apparatus, and components common to several branches of physics and astronomy (restricted to new topics in section 07)

Improved circuit design for electrostatic self‐resonating vibroscopes

H. Robinson, H. F. Wu, M. Ames, and P. Schwartz

Rev. Sci. Instrum. 58, 436 (1987); http://dx.doi.org/10.1063/1.1139250 (5 pages) | Cited 13 times

Full Text: | Download PDF

Show Abstract
In this paper a new circuit design for automatic electrostatic vibroscopes is presented. Previously, the component which stabilized the self‐oscillatory motion of the filament in the feedback loop of electrostatic vibroscopes was a negative temperature coefficient thermistor. In the present system this device is replaced with a programmable analog compander. This modification represents an improvement because response time is faster, the steady‐state conditions are more stable, and the overall performance of the vibroscope is less susceptible to errors caused by changes in environmental conditions.
Show PACS
07.50.Ek Circuits and circuit components
06.30.Dr Mass and density
07.10.-h Mechanical instruments and equipment

Carbon composition resistors for cryogenic thermometry

Vittorio De Cosmo, Herbert Gush, Mark Halpern, and Alex Leung

Rev. Sci. Instrum. 58, 441 (1987); http://dx.doi.org/10.1063/1.1139251 (3 pages) | Cited 2 times

Full Text: | Download PDF

Show Abstract
Preparation of thermometers from carbon composition resistors to avoid large changes during repeated thermal cycling is discussed. Furthermore, it is found that the expression 1/(T)1/2 =A+B ln(R−R0)+C ln2(R−R0)+D ln3(R−!iR0) R−R0) provides a very good description of the thermometer temperature T as a function of device resistance R. Fitting accuracies of δT<1 mK at cryogenic temperatures are achieved. The value of R0 can be chosen so that the residual errors are not more than 10 K even up to room temperature.
Show PACS
84.32.Ff Conductors, resistors (including thermistors, varistors, and photoresistors)
07.20.Dt Thermometers
07.20.Mc Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment

Quantitative visualization of steady and unsteady flows using spark velocimetry

E. C. Hansen

Rev. Sci. Instrum. 58, 444 (1987); http://dx.doi.org/10.1063/1.1139252 (7 pages)

Full Text: | Download PDF

Show Abstract
This paper describes the usefulness, limitations, and potential applications of spark velocimetry to complex flows in fluid machinery. Spark velocimetry uses high‐voltage high‐frequency sparks to successively illuminate a column of air particles and thus map out a complex velocity field. This work applied spark velocimetry to a two‐dimensional boundary layer, a three‐dimensional horseshoe vortex boundary layer, and boundary layers on the suction surface of a rotor blade in steady flow and in rotating stall. Measurements made in a two‐dimensional boundary layer compared favorably with measurements taken using a total pressure probe. The measurements in the horseshoe vortex showed the types of primary and secondary flow expected. The velocity profile of the boundary layer on a rotor blade was shown in both unstalled and stalled flow. The spark velocimetry method was shown to be a very useful measurement tool for three‐dimensional and unsteady flows with some limitations.
Show PACS
47.80.-v Instrumentation and measurement methods in fluid dynamics
51.70.+f Optical and dielectric properties
07.50.-e Electrical and electronic instruments and components
07.60.-j Optical instruments and equipment

New simultaneous thermogravimetry and modulated molecular beam mass spectrometry apparatus for quantitative thermal decomposition studies

Richard Behrens

Rev. Sci. Instrum. 58, 451 (1987); http://dx.doi.org/10.1063/1.1139253 (11 pages) | Cited 16 times

Full Text: | Download PDF

Show Abstract
A new type of instrument has been designed and constructed to measure quantitatively the gas phase species evolving during thermal decompositions. These measurements can be used for understanding the kinetics of thermal decomposition, determining the heats of formation and vaporization of high‐temperature materials, and analyzing sample contaminants. The new design allows measurements to be made on the same time scale as the rates of the reactions being studied, provides a universal detection technique to study a wide range of compounds, gives quantitative measurements of decomposition products, and minimizes interference from the instrument on the measurements. The instrument design is based on a unique combination of thermogravimetric analysis (TGA), differential thermal analysis (DTA), and modulated beam mass spectroscopy (MBMS) which are brought together into a symbiotic relationship through the use of differentially pumped vacuum systems, modulated molecular beam techniques, and computer control and data‐acquisition systems. A data analysis technique that calculates partial pressures in the reaction cell from the simultaneous microbalance force measurements and the modulated mass spectrometry measurements has been developed. This eliminates the need to know the ionization cross section, the ion dissociation channels, the quadrupole transmission, and the ion detector sensitivity for each thermal decomposition product prior to quantifying the mass spectral data. The operation of the instrument and the data analysis technique are illustrated with the thermal decomposition of contaminants from a precipitated palladium powder.
Show PACS
82.80.-d Chemical analysis and related physical methods of analysis
82.80.Ms Mass spectrometry (including SIMS, multiphoton ionization and resonance ionization mass spectrometry, MALDI)
82.60.Cx Enthalpies of combustion, reaction, and formation

High‐precision vapor‐pressure isotherms: Apparatus, errors, and results

R. M. Suter, N. J. Colella, R. Gangwar, and W. Wang

Rev. Sci. Instrum. 58, 462 (1987); http://dx.doi.org/10.1063/1.1139254 (6 pages) | Cited 5 times

Full Text: | Download PDF

Show Abstract
We describe an apparatus for measuring high‐resolution, low‐noise vapor‐pressure isotherms of physisorbed films. The data can be numerically differentiated to yield precise values of the two‐dimensional isothermal compressibility of monolayer films, allowing detailed analysis of phase transitions. The apparatus is a carefully implemented, automated adaptation of standard volumetric systems.
Show PACS
68.35.Md Surface thermodynamics, surface energies
68.43.-h Chemisorption/physisorption: adsorbates on surfaces

Modular software‐controlled electrochemical system

D. Hagan, J. Spivey, and V. A. Niculescu

Rev. Sci. Instrum. 58, 468 (1987); http://dx.doi.org/10.1063/1.1139255 (7 pages) | Cited 6 times

Full Text: | Download PDF

Show Abstract
A modular microcomputer‐controlled three‐electrode potentiostat configured with graphics is presented. The system is designed for metallic surface characterization and is capable of performing in different modes of operation including single sweep voltammetry, cyclic voltammetry, and chronoamperometry. An integrated and flexible software system for control, data taking, data storage, and transfer is described. Data analysis software for the IBM‐PC computer including two‐ and three‐dimensional plotting as well as menu‐driven theoretical modeling, simulation, and curvefitting has been developed.
Show PACS
07.05.Hd Data acquisition: hardware and software
07.05.Kf Data analysis: algorithms and implementation; data management
07.05.Rm Data presentation and visualization: algorithms and implementation
82.80.-d Chemical analysis and related physical methods of analysis
07.90.+c Other topics in instruments, apparatus, and components common to several branches of physics and astronomy (restricted to new topics in section 07)

Automatic Langmuir probe plasma diagnostic

M. B. Hopkins, W. G. Graham, and T. J. Griffin

Rev. Sci. Instrum. 58, 475 (1987); http://dx.doi.org/10.1063/1.1139256 (2 pages) | Cited 12 times

Full Text: | Download PDF

Show Abstract
The hardware implementation of a computer‐based Langmuir probe technique is described. The technique, which is applicable in a wide range of dc plasma conditions, allows a full range of plasma parameters to be measured efficiently.
Show PACS
52.70.Ds Electric and magnetic measurements
52.70.Nc Particle measurements
52.35.Fp Electrostatic waves and oscillations (e.g., ion-acoustic waves)
Page 1 of 2 Pages Next Page | Jump to Page
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close