Results 291 to 300 of about 415,527 (312)

A simple Stark modulator

Review of Scientific Instruments, 1991
A simple, all solid-state, circuit is described that produces a square wave with variable amplitude from 0 to 1000 V and a frequency of 120 kHz into a capacitive load. The device is of application to Stark modulation in microwave and gas radical e.s.r. spectroscopy.
Mario Benedetti, N. Martinez, D. Prado
openaire   +2 more sources

Simple Thermoelectric Module

Advanced Materials Research, 2008
The short-time-consumption melting and hot pressing processes were used to synthesize n-type and p-type Bi-Sb-Te thermoelectric materials. The synthesis materials were characterized and used for the module fabrication. The aluminium substrate was used instead of alumina substrate because it is easy to cut and to avoid fragility of the module.
V. Kosalathip   +3 more
openaire   +2 more sources

Simple Acoustic Grating Modulators

Applied Optics, 1972
Simple low-cost modulators based on the Raman-Nath regime of acoustooptic diffraction have been demonstrated. Experimental results on internal laser modulators constructed from some dense flint glasses and fused quartz are presented. 100% modulation of He-Ne lasers with rise times on the order of 1 musec are obtained with 10-MHz modulator drive powers ...
J. M. Hammer, D. J. Channin
openaire   +3 more sources

Roots of Simple Modules

Canadian Mathematical Bulletin, 2006
AbstractWe introduce roots of indecomposable modules over group algebras of finite groups, and we investigate some of their properties. This allows us to correct an error in Landrock's book which has to do with roots of simple modules.
openaire   +2 more sources

A simple Stark modulator

Journal of Physics E: Scientific Instruments, 1969
A simple, all solid-state, circuit is described which has produced a square wave with an amplitude of 1800 V and a frequency of 80 kHz in a capacitative load. The device is of application to Stark modulation in microwave and gas radical e.s.r. spectroscopy. It has certain advantages over previous systems in being more compact, providing an output which
B Weiss, M J Whittle
openaire   +2 more sources

d-Simple rings and simple -modules [PDF]

open access: possibleMathematical Proceedings of the Cambridge Philosophical Society, 1999
We use certain derivations of a polynomial ring, that do not leave any proper nonzero ideal invariant, to construct simple non-holonomic modules over the nth Weyl algebra. This approach extends to the rings of differential operators of other smooth afne varieties, like smooth quadric surfaces.
openaire   +1 more source

A simple, inexpensive photoelastic modulator

American Journal of Physics, 2009
A block of birefringent gelatin acts as a variable retarder when driven harmonically by a speaker coil and can be used to vary the polarization of a laser beam sinusoidally. We model this effect with Mueller matrices and show that the gelatin behaves much like a commercial photoelastic modulator and is suitable for a variety of polarimetry experiments ...
Adam Green   +4 more
openaire   +3 more sources

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