نتایج جستجو برای: cyclotron frequency

تعداد نتایج: 489327  

خامسی, سیده معصومه , غفاریان, پردیس, گلرخ نودهی, محمدرسا,

It is well known that the acceptance tests should be done when a cyclotron installed in order to measure the performance claimed by manufacturer. As well as the photon and neutron dose rate during the production of flourin-18 and nitrogen-13 in self shield cyclotron in Masih Daneshvari hospital have been measured as function of distance and beam current. The first Self-shield hospital cyclotron...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1992
H Dehmelt R Van Dyck F Palmer

Compositeness of the electron may show up in a very small deviation of the measured electron g factor from one calculated for a point electron by quantum electrodynamics. The precision of our g measurements is currently limited by an interaction of the cyclotron motion with standing waves in the trap cavity containing the electron. The important element introduced here is the systematic explora...

2007
G. G. Howes S. C. Cowley A. A. Schekochihin

This paper studies the turbulent cascade of magnetic energy in weakly collisional magnetized plasmas. A cascade model is presented, based on the assumptions of local nonlinear energy transfer in wavenumber space, critical balance between linear propagation and nonlinear interaction times, and the applicability of linear dissipation rates for the nonlinearly turbulent plasma. The model follows t...

Journal: :Monthly Notices of the Royal Astronomical Society 2022

ABSTRACT We investigate the atmospheric and magnetospheric conditions of massive, close-in exoplanet ? Andromedae b (hereafter ups And b). In particular, we explore whether radio emission can be produced by Cyclotron Maser Instability (CMI), this escape from its source region. For this, compare local cyclotron frequency to plasma frequency. The planetary mass has a decisive impact on both these...

2001
S. Vincena W. Gekelman

Experiments are performed in the Large Plasma Device ~LaPD! @Gekelman et al., Rev. Sci. Instrum. 62, 2875 ~1991!# at the University of California, Los Angeles to study the propagation of the shear Alfvén wave in a parallel gradient of the background magnetic field. The waves are excited by modulating a field-aligned electron current drawn to a disk antenna with a radius on the order of the elec...

2012
W. A. Farmer

A calculation is presented of the radiation pattern of shear Alfv en waves generated by a burst of charged particles in a charge-neutral plasma with two-ions of differing charge-to-mass ratios. The wake pattern is obtained for the inertial and kinetic regimes of wave propagation. Due to the presence of two ion-species, the Alfv en waves propagate within two different frequency bands separated b...

Journal: :Journal of the American Society for Mass Spectrometry 2008

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