منابع مشابه
A Digital Recording Double Fabry-perot Spectrometer
A simple and reliable recording double Fabry-Perot spectrometer is described. The linear increase in the first etalon was achieved as usual by means of a pressure reservoir of 200 atm. and a small glass capillary tube. With a second pressure reservoir and a needle valve, the flow rate of which could be changed by a servomotor, the pressure in the second Fabry-Perot was increased. The difference...
متن کاملSelf-recording audiometry in industry.
Pelmear, P. L. and Hughes, Brenda J. (1974). British Journal of Industrial Medicine, 31, 304-309. Self-recording audiometry in industry. A study of initial and repeat audiograms of 118 drop forge employees using fixed frequency self-recording audiometry showed that the mean of the differences at the test frequencies 0 5, 1, 2, 3, 4, and 6 kHz ranges from 0 47 dB to + 0-61 dB. The largest standa...
متن کاملA Terahertz Photomixing Spectrometer: Application to SO2 Self Broadening
A new tunable cw far-infrared difference-frequency spectrometer has been developed by mixing two single-mode visible dye lasers separated by terahertz frequencies in an ultrahigh-speed photoconductor. The photomixer device is fabricated with submicrometer interdigital electrodes driving a broadband self-complementary spiral antenna on epitaxial low-temperature-grown (LTG) GaAs material. The LTG...
متن کاملA coincidence scintillation spectrometer
The coincidence spectrometer consists of two scintillation spectrometers, each of which can be used as either a beta-ray or a gamma-ray spectrometer, depending on what crystals are used. The pulses from the first spectrometer are analyzed with a single channel analyzer. The pulses corresponding to a certain energy are picked out with the analyzer and are fed into one channel of a coincidence ci...
متن کاملMagnetic Nanoparticle Arrays Self-Assembled on Perpendicular Magnetic Recording Media
We study magnetic-field directed self-assembly of magnetic nanoparticles onto templates recorded on perpendicular magnetic recording media, and quantify feature width and height as a function of assembly time. Feature widths are determined from Scanning Electron Microscope (SEM) images, while heights are obtained with Atomic Force Microscopy (AFM). For short assembly times, widths were ~150 nm,...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 1931
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1748736