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Volume 66, Issue 1
Displaying 1-4 of 4 articles from this issue
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Particle AccelerationYasushi Nishida1991 Volume 66 Issue 1 Pages 9-34
Published: July 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSAs one of a new application field of the results of plasma physics, the research fields on high energy particle accelerations and beam handling are growing rapidly. In the present paper, the fundamental ideas and recent results are reviewed, including a plasma beat wave accelerator, a Vp×B accelerator (or the Surfatron effect), a plasma wake field accelerator, plasma lenses and accelerators without plasma but based on principle from the Vp × B accelerator in the plasma. Recent experimental results are shown.View full abstractDownload PDF (2274K) -
Keiji Tani, Tomonori Takizuka, Masafumi Azumi1991 Volume 66 Issue 1 Pages 35-50
Published: July 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSStudies of ripple losses of alpha particles in tokamak reactors have been reviewed with particular reference to the results from recent benchmark test for ITER. Recent studies of losses of alpha particles incidental to applied techniques making use of field ripple such as burn control and refueling have also been described.View full abstractDownload PDF (1482K) -
Motohiko Tanaka1991 Volume 66 Issue 1 Pages 51-66
Published: July 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSA new generation of simulation methods is now emerging in the United States and Japan that will bridge the giant gap in space and time existing between the kinetic and magnetohydrodynamic natures of the plasmas. We briefly describe the simulation algorithm and several physics applications that have succsessfully been made by using the “macroscale particle simulation code”; 1) Alfven-ion-cyclotron instability and pitch-angle scattering, 2) excitation of the kinetic Alfven wave and heating of the plasma, 3) stabilization of FRC tilting instability by ion orbit effects, and 4) kink instability of peaked density ion beam. In all the cases, the macroscale particle simulation works satisfactorily even for strongly nonlinear, inhomogeneous plasmas, casting unlimited amount of hope in elucidating the most difficult, unresolved problems in plasma physics, such as anomalous transport.View full abstractDownload PDF (1776K) -
Shunji Ido, Masahisa Ishine1991 Volume 66 Issue 1 Pages 69-79
Published: July 20, 1991
Released on J-STAGE: October 22, 2010
JOURNAL FREE ACCESSParallel programming was applied to a simulation code, which will be used to examine the primary electron orbits in ion source plasmas. The motions of electrons are traced by a number of parallel processors. When high parallelized ratio can be achieved, highly effective acceleration of calculations will be obtained, if the data communication between parallel processors are well managed. Here we used 32 bit parallel microprocessors, that is, transputers of type T800 of 20 MHz, and Parallel FORTRAN. Transputers are connected with each other in high speed serial link lines. When we used 20 transputers, relative speed of 18.9 was achieved when a control program to manage the data communication was developed.View full abstractDownload PDF (1984K)
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