NDLI: A revisit to self-excited push pull vacuum tube radio frequency oscillator for ion sources and power measurements.

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Invited Review Article: Review of post-process optical form metrology for industrial-grade metal additive manufactured parts.

Contributed Review: A review of the investigation of rare-earth dopant profiles in optical fibers.

Contributed Review: Source-localization algorithms and applications using time of arrival and time difference of arrival measurements.

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Null polarimetry near shot noise limit at 1 Hz.

Optical performance of an ultra-sensitive horn-coupled transition-edge-sensor bolometer with hemispherical backshort in the far infrared.

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Low vibration high numerical aperture automated variable temperature Raman microscope.

CdTe Timepix detectors for single-photon spectroscopy and linear polarimetry of high-flux hard x-ray radiation.

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Validation of modelled imaging plates sensitivity to 1-100 keV x-rays and spatial resolution characterisation for diagnostics for the 'PETawatt Aquitaine Laser'.

A versatile dual-species Zeeman slower for caesium and ytterbium.

A broadband ferromagnetic resonance dipper probe for magnetic damping measurements from 4.2 K to 300 K.

An adaptable dual species effusive source and Zeeman slower design demonstrated with Rb and Li.

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A revisit to self-excited push pull vacuum tube radio frequency oscillator for ion sources and power measurements.

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Erratum: 'Oscillatory instability development in extraction system of a negative ion source' [Rev. Sci. Instrum. 87, 02A508 (2016)].

Erratum: 'Mixed Pierce-two-stream instability development in an extraction system of a negative ion source' [Rev. Sci. Instrum. 87, 02A509 (2016)].

Publisher's Note: 'A versatile dual-species Zeeman slower for caesium and ytterbium' [Rev. Sci. Instrum. 87, 043109 (2016)].

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A revisit to self-excited push pull vacuum tube radio frequency oscillator for ion sources and power measurements.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Punte, L. R. M. Rebecca, L. Thanga, H. H. Hlondo, L. R. Lalremruata, B. Lalnunthari, J.
Description	Country affiliation: India Author Affiliation: Hlondo LR ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.); Lalremruata B ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.); Punte LR ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.); Rebecca L ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.); Lalnunthari J ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.); Thanga HH ( Nuclear & Hydrogen Energy Research Group, Department of Physics, Mizoram University, Tanhril, Aizawl, Mizoram 796004, India.)
Abstract	Self-excited push-pull vacuum tube oscillator is one of the most commonly used oscillators in radio frequency (RF)-ion plasma sources for generation of ions using radio frequency. However, in spite of its fundamental role in the process of plasma formation, the working and operational characteristics are the most frequently skip part in the descriptions of RF ion sources in literatures. A more detailed treatment is given in the present work on the RF oscillator alone using twin beam power tetrodes 829B and GI30. The circuit operates at 102 MHz, and the oscillation conditions, stability in frequency, and RF output power are studied and analyzed. A modified form of photometric method and RF peak voltage detection method are employed to study the variation of the oscillator output power with plate voltage. The power curves obtained from these measurements are quadratic in nature and increase with increase in plate voltage. However, the RF output power as measured by photometric methods is always less than the value calculated from peak voltage measurements. This difference is due to the fact that the filament coil of the ordinary light bulb used as load/detector in photometric method is not a perfect inductor. The effect of inductive reactance on power transfer to load was further investigated and a technique is developed to estimate the amount of power correction needed in the photometric measurement result.
ISSN	00346748
Issue Number	4
Journal	Review of Scientific Instruments
Volume Number	87
e-ISSN	10897623
Language	English
Publisher	American Institute of Physics
Publisher Date	2016-04-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Instrumentation

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