نتایج جستجو برای: plasma radiofrequency heating

تعداد نتایج: 423514  

Journal: :Physical review letters 2009
Ralph G DeVoe

Classical collisions with an ideal gas generate non-Maxwellian distribution functions for a single ion in a radio frequency ion trap. The distributions have power-law tails whose exponent depends on the ratio of buffer gas to ion mass. This provides a statistical explanation for the previously observed transition from cooling to heating. Monte Carlo results approximate a Tsallis distribution ov...

2007
A. V. Vasenkov V. I. Kolobov A. V. Melechko

Currently, high crystalline quality materials such as carbon nanotubes (CNTs) are produced only at a temperature in an excess of 500 C. This paper reports on low-temperature synthesis of CNTs by selective heating of catalytic particles using two complementary mechanisms: enhanced exothermic catalytic reactions and inductive heating by radio frequency electromagnetic fields.

Journal: :Acta Astronautica 2022

Radiofrequency excitation in single-stage Hall Effect Thrusters is proposed as a method to increase the performance of these devices. The topology magnetic and electric field within makes it possible excite quasistatic waves which travel longitudinally through channel across magnetostatic field, whose resonances are found at electron cyclotron gyrofrequency its upper harmonics. An in-house pseu...

2014
Noriyasu Kawai Daichi Kobayashi Takahiro Yasui Yukihiro Umemoto Kentaro Mizuno Atsushi Okada Keiichi Tozawa Takeshi Kobayashi Kenjiro Kohri

BACKGROUND Magnetite used in an 8-MHz radiofrequency (RF) capacitive heating device can increase the temperature of a specific site up to 45°C. When treating a metastatic lesion around large abdominal vessels via hyperthermia with magnetite, heating-induced adverse effects on these vessels need to be considered. Therefore, this study examined hyperthermia-induced damage to blood vessel walls in...

2008
Takashi Suganuma Yoshifumi Ueno Hiroshi Komori Akira Endo Akira Sumitani

A laser produced Sn plasma driven with a pulsed CO2 laser and emitting EUV radiation has been generated in a magnetic field of 0.5T. The multiple-ionized plasma ions are efficiently guided along the B field lines of the double coil magnet. The neutral Sn atoms and Sn clusters, however, expand freely inside the vacuum chamber and contaminate e.g. EUV optics. We therefore evaluated ECR heating of...

2000
A. Różańska B. Czerny

We determine simple analytical conditions for combined radiative and thermal equilibrium between the X-ray emitting plasma and cold reprocessor in active galactic nuclei (AGN) and galactic black holes (GBH). These conditions determine the pressure at the transition zone, which is not arbitrary in the static situation. The conditions for static solution are derived analytically for different for...

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