Review of Scientific Instruments

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Construction of Thin Mylar Gas Target Holders
Review of Scientific Instruments - Tập 28 Số 6 - Trang 471-472 - 1957
J. C. Corelli, M. Stanley Livingston, L. Seidlitz
A Mott polarimeter operating at MeV electron beam energies
Review of Scientific Instruments - Tập 82 Số 3 - 2011
V. Tioukine, K. Aulenbacher, E. Riehn
We have developed a Mott electron polarimeter for the Mainzer microtron (MAMI) accelerator in Mainz, Germany. At beam energies ranging between 1.0 and 3.5 MeV two double focusing magnet spectrometers collect elastically backscattered electrons from gold targets. In spite of the small spectrometer acceptance, a sufficient statistical efficiency is achieved to provide very fast measurements ...... hiện toàn bộ
Optimization of the perturbation signal for electrochemical impedance spectroscopy in the time domain
Review of Scientific Instruments - Tập 64 Số 11 - Trang 3111-3115 - 1993
G Popkirov, R. N. Schindler
The choice of the perturbation wave form is of crucial importance for reliable electrochemical impedance spectroscopy measurements based on the fast Fourier transformation. Using numerical simulation, arguments and results are presented for the choice and the optimization of a perturbation signal constructed as a superposition of discrete sine waves with selected frequencies. Two possible ...... hiện toàn bộ
Accurate determination of the electrical resistivity from mutual inductance measurements
Review of Scientific Instruments - Tập 46 Số 4 - Trang 398-408 - 1975
Michael D. Rosenthal, B. W. Maxfield
When a conducting specimen is placed inside a coil, the coil impedance changes. For simple coil and specimen geometries, the impedance change can be related to the electrical resistivity of the specimen. This paper describes a variety of methods for the accurate determination of the resistivity of a cylindrical specimen from the measured change in mutual inductance of a cylindrically symme...... hiện toàn bộ
Thermal conductivity, thermal diffusivity, and specific heat of thin samples from transient measurements with hot disk sensors
Review of Scientific Instruments - Tập 65 Số 12 - Trang 3856-3859 - 1994
Mattias Gustavsson, Ernest Karawacki, Stefan Gustafsson
Transient measurements of thermal conductivity, thermal diffusivity, and specific heat capacity have been performed with hot disk sensors in thin samples of metallic materials. With this new variation of the hot disk method the sample size can be reduced to a volume less than ten cubic centimeters for copper at room temperature. It is also shown that the specific heat capacity can be conve...... hiện toàn bộ
Rapidly pulsed helium droplet source
Review of Scientific Instruments - Tập 80 Số 4 - 2009
Dominik Pentlehner, Ricarda Riechers, Bernhard Dick, Alkwin Slenczka, U. Even, N. Lavie, Raviv Brown, Kfir Luria
A pulsed valve connected to a closed-cycle cryostat was optimized for producing helium droplets. The pulsed droplet beam appeared with a bimodal size distribution. The leading part of the pulse consists of droplets suitable for doping with molecules. The average size of this part can be varied between 104 and 106 helium atoms, and the width of the distribution is smaller as compared to a c...... hiện toàn bộ
Controlled growth of helium nanodroplets from a pulsed source
Review of Scientific Instruments - Tập 76 Số 10 - 2005
Shengfu Yang, Scott M. Brereton, Andrew M. Ellis
Factors affecting the size of liquid-helium droplets produced by a pulsed nozzle are described. The shape of the nozzle orifice is found to be important in allowing control of the size of the droplets. With an appropriate choice of nozzle geometry, the average droplet size is shown to be continuously variable over nearly two orders of magnitude by adjustment of the helium gas stagnation pr...... hiện toàn bộ
Single Pulse Method for Measurement of Electrical Double Layer Parameters
Review of Scientific Instruments - Tập 32 Số 5 - Trang 588-592 - 1961
J. S. Riney, G. M. Schmid, Norman Hackerman
An electric analog of an electrochemical cell is assumed to consist of a constant ohmic resistance, representing the bulk electrolyte, and a parallel combination of resistance and differential capacity, representing one interface. The response of the model to a rectangular current-time function is given in terms of circuit components. The interface parameters are not assumed to be constant...... hiện toàn bộ
Commissioning and performance of the variable line spacing plane grating monochromator beamline at the Canadian Light Source
Review of Scientific Instruments - Tập 78 Số 8 - 2007
Yongfeng Hu, Lucia Zuin, G.M. Wright, R. Igarashi, M. McKibben, Tracy Wilson, S. Y. Chen, Timothy P. Johnson, Dylan Maxwell, B. Yates, T. K. Sham, R. Reininger
The variable line spacing plane grating monochromator beamline at the Canadian Light Source (CLS) employs three grazing incidence variable line spacing gratings to cover a photon energy range of 5–250eV. It uses a 185mm period length planar permanent magnet insertion device as the photon source, sharing a straight section with another soft x-ray beamline at the CLS. The commissioning and p...... hiện toàn bộ
A Rapid Quenching Technique for the Preparation of Thin Uniform Films of Amorphous Solids
Review of Scientific Instruments - Tập 41 Số 8 - Trang 1237-1238 - 1970
H. S. Chen, Charles E. Miller
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