Review of Scientific Instruments

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
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
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
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
High-resolution ion mobility measurements
Review of Scientific Instruments - Tập 68 Số 2 - Trang 1122-1129 - 1997
Philippe Dugourd, Robert R. Hudgins, David E. Clemmer, Martin F. Jarrold
Gas phase ion mobility measurements can resolve structural isomers for polyatomic ions and provide information about their geometries. A new experimental apparatus for performing high-resolution ion mobility measurements is described. The apparatus consists of a pulsed laser vaporization/desorption source coupled through an ion gate to a 63-cm-long drift tube. The ion gate is a critical co...... hiện toàn bộ
Ion beam milling fabrication of a small off-axis ellipsoidal mirror, diffraction limited to 1 μm resolution at 14 nm
Review of Scientific Instruments - Tập 72 Số 2 - Trang 1559-1564 - 2001
Raymond Mercier, M. Mullot, Michel Lamare, Jean‐Daniel Tissot
One interest of extreme ultraviolet wavelengths is their potentially high optical resolution. Such optics require high precision, low roughness surfaces onto which will be deposed adequate multilayers giving near-normal incidence reflection. For a spatially resolved interferometer, we have manufactured and tested with a reasonable degree of confidence an 8×8 mm off-axis ellipsoidal mirror,...... hiện toàn bộ
Infrared imaging of defects heated by a sonic pulse
Review of Scientific Instruments - Tập 71 Số 6 - Trang 2418-2421 - 2000
L. D. Favro, Xiaoyan Han, Zhong Ouyang, Gang Sun, Hua Sui, R. L. Thomas
High-frequency pulsed sonic excitation is combined with an infrared camera to image surface and subsurface defects. Irreversible temperature increases on the surface of the object, resulting from localized heating in the vicinity of cracks, disbonds, or delaminations, are imaged as a function of time prior to, during, and following the application of a short pulse of sound. Pulse durations...... hiện toàn bộ
Electron Multipliers in Mass Spectrometry; Effect of Molecular Structure
Review of Scientific Instruments - Tập 27 Số 2 - Trang 109-109 - 1956
H. E. Stanton, W. A. Chupka, Mark G. Inghram
Imaging ellipsometry revisited: Developments for visualization of thin transparent layers on silicon substrates
Review of Scientific Instruments - Tập 67 Số 8 - Trang 2930-2936 - 1996
Gang Jin, R. Jansson, Hans Arwin
Imaging ellipsometry is presented as a technique for quantification and visualization of the lateral thickness distribution of thin (0–30 nm) transparent layers on solid substrates. The main advantage of imaging ellipsometry is that every point on a surface is measured at the same time with a high lateral resolution. The method is based on the use of combined null and off-null ellipsometry...... hiện toàn bộ
Taber vibration isolator for vacuum and cryogenic applications
Review of Scientific Instruments - Tập 70 Số 6 - Trang 2742-2750 - 1999
Hardy Chan, J. Long, John C. Price
We present a procedure for the design and construction of a passive, multipole, mechanical high-stop vibration isolator. The isolator, consisting of a stack of metal disks connected by thin wires, attenuates frequencies in the kilohertz range, and is suited to both vacuum and cryogenic environments. We derive an approximate analytical model and compare its predictions for the frequencies o...... hiện toàn bộ
Tổng số: 327   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10