Efficiency of gyrotrons with a tapered magnetic field in the regime of soft self-excitation

2018 ◽  
Vol 25 (1) ◽  
pp. 013121 ◽  
Author(s):  
O. Dumbrajs ◽  
G. S. Nusinovich
Keyword(s):  
Magnetic Field ◽  
Tapered Magnetic Field

Efficiency enhancement of anomalous-Doppler electron cyclotron masers with tapered magnetic field

2014 ◽  
Vol 21 (2) ◽  
pp. 023117 ◽  
Author(s):  
Chao-Ran Xie ◽  
Ling-Bao Kong ◽  
Pu-Kun Liu ◽  
Chao-Hai Du ◽  
Zhi-Ling Hou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Cyclotron ◽  
Efficiency Enhancement ◽  
Electron Cyclotron Masers ◽  
Tapered Magnetic Field

scholarly journals Effect of tapered magnetic field on expanding laser-produced plasma for heavy-ion inertial fusion

2016 ◽  
Vol 35 (1) ◽  
pp. 53-57 ◽  
Author(s):  
T. Kanesue ◽  
S. Ikeda
Keyword(s):  
Magnetic Field ◽  
Ion Beam ◽  
Heavy Ion ◽  
Ion Source ◽  
Inertial Fusion ◽  
Laser Ion Source ◽  
Laser Produced Plasma ◽  
The Magnetic Field ◽  
Target Side ◽  
Tapered Magnetic Field

AbstractA laser ion source (LIS) is a promising candidate as an ion source for heavy-ion inertial fusion (HIF), where a pulsed ultra-intense and low-charged heavy ion beam is required. It is a key development for a LIS to transport laser-produced plasma with a magnetic field to achieve a high-current beam. The effect of a tapered magnetic field on laser-produced plasma is demonstrated by comparing the results with a straight solenoid magnet. The magnetic field of interest is a wider aperture on a target side and narrower aperture on an extraction side. Based on the experimentally obtained results, the performance of a scaled LIS for HIF was estimated.

Particle-in-cell analysis of beam-wave interaction in gyrotron cavity with tapered magnetic field

2010 ◽  
Vol 88 (11) ◽  
pp. 857-861 ◽  
Author(s):  
Anil Kumar ◽  
Hasina Khatun ◽  
Nitin Kumar ◽  
Udaybir Singh ◽  
V. Vyas ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Resonant Cavity ◽  
Wave Interaction ◽  
Operating Mode ◽  
Beam Wave ◽  
Particle In Cell ◽  
Magnetic Field Profile ◽  
Pic Code ◽  
Beam Wave Interaction ◽  
Tapered Magnetic Field

A commercially available electromagnetic simulator — MAGIC, a particle-in-cell (PIC) code — has been used to carry out a comparative study of the beam-wave interaction under uniform and tapered magnetic field profiles of a 42 GHz, 200 kW gyrotron. The magnetic field profile across the resonant cavity varies by ±6.5% with a peak value of 1.615 T. The MAGIC simulation shows the desire performance of the gyrotron under both magnetic field conditions with an operating mode TE03 and a pitch factor of 1.26. The analysis of the simulated results show that stability in the power growth was reached more quickly and achieved higher output power in the case of a tapered magnetic field.

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

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