A Sector-Type Beta-Ray Spectrometer: A Laboratory Experiment

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

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An Energy Analyser for Contrast Enhancement in STEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052183 ◽

1974 ◽

Vol 32 ◽

pp. 434-435

Author(s):

H.T. Pearce-Percy

Keyword(s):

Contrast Enhancement ◽

Bending Angle ◽

Magnetic Sector ◽

Conventional Design ◽

Bending Radius ◽

Sector Type

Recently an energy analyser of the uniform magnetic sector type has been installd in a 100KV microscope. This microscope can be used in the STEM mode. The sector is of conventional design (Fig. 1). The bending angle was chosen to be 90° for ease of construction. The bending radius (ρ) is 20 cm. and the object and image distances are 42.5 cm. and 30.0 cm. respectively.

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Susceptibility of Angoff Method to Judgmental Errors: A Laboratory Experiment

PsycEXTRA Dataset ◽

10.1037/e518572013-354 ◽

2006 ◽

Author(s):

Daren S. Protolipac ◽

Lisa Finkelstein ◽

John Kulas

Keyword(s):

Laboratory Experiment ◽

Angoff Method

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Investigation of discontinuous periodic signals using the measuring labview complex

Quality Innovation Education ◽

10.31145/1999-513x-2020-5-72-79 ◽

2020 ◽

pp. 72-79

Author(s):

E.B. Solovyeva ◽

◽

Yu.M. Inshakov ◽

Keyword(s):

Fourier Series ◽

Laboratory Experiment ◽

Gibbs Phenomenon ◽

Electrical Signals ◽

Measuring Complex ◽

Universal Measuring ◽

Depth Study ◽

Periodic Signals ◽

Truncated Fourier Series

General approaches to the analysis of the Gibbs phenomenon for discontinuous periodic signals approximated by the truncated Fourier series are considered. Methods for smoothing the truncated Fourier series and improving its convergence are discussed. The software means for modeling is a universal measuring complex LabVIEW, which possesses a convenient environment for analyzing electrical signals, on the basis of this complex a laboratory experiment is carried out. The advantages of the measuring LabVIEW complex and its capabilities for in-depth study of discontinuous periodic signals are noted.

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