Author: Hironori Takahashi
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Ion Heating in ATC Tokamak in the Ion Cyclotron Range of Frequencies
Author: Hironori Takahashi
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
Radio-frequency Heating and Propagation in Tokamak Plasmas in the Ion Cyclotron Range of Frequencies
Author: Tak Kuen Mau
Publisher:
ISBN:
Category : High temperature plasmas
Languages : en
Pages : 318
Book Description
Publisher:
ISBN:
Category : High temperature plasmas
Languages : en
Pages : 318
Book Description
Ion Cyclotron Range of Frequency Heating on the Tokamak Fusion Test Reactor
Author: D. W. Johnson
Publisher:
ISBN:
Category : Tokamak Fusion Test Reactor (Project).
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Tokamak Fusion Test Reactor (Project).
Languages : en
Pages : 24
Book Description
Edge Ion Heating and Parametric Decay During Injection of Ion Cyclotron Resonance Frequency Power on the Alcator C-Mod Tokamak
Author: Jon Christian Rost
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
A population of suprathermal ions has been observed in the scrape-off layer during injection of power in the ion cyclotron frequency range on the Alcator C-Mod tokamak. These ions generated energetic neutrals measured with a charge-exchange neutral particle analyzer. In the hydrogen minority heating regime, fast particles were generated only when the injected power was above 500kW. Fast particles were observed at a low level of injected power when the frequency was a multiple of the ion cyclotron frequency in the scrape-off layer. The power deposited in the edge was always less than a few percent of the injected power and did not increase impurity levels. The theoretical threshold of parametric decay instabilities for decay of the pump wave in the antenna near field into an ion Bernstein wave and an ion cyclotron quasimode matches the observed threshold for fast ion production under a variety of conditions.
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
A population of suprathermal ions has been observed in the scrape-off layer during injection of power in the ion cyclotron frequency range on the Alcator C-Mod tokamak. These ions generated energetic neutrals measured with a charge-exchange neutral particle analyzer. In the hydrogen minority heating regime, fast particles were generated only when the injected power was above 500kW. Fast particles were observed at a low level of injected power when the frequency was a multiple of the ion cyclotron frequency in the scrape-off layer. The power deposited in the edge was always less than a few percent of the injected power and did not increase impurity levels. The theoretical threshold of parametric decay instabilities for decay of the pump wave in the antenna near field into an ion Bernstein wave and an ion cyclotron quasimode matches the observed threshold for fast ion production under a variety of conditions.
Ion Cyclotron Range of Frequencies Mode Conversion Electron Heating in Deuterium-hydrogen Plasmas in the Alcator C-Mod Tokamak
Author: Yijun Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Localized direct electron heating by mode-converted ion cyclotron range of frequencies (ICRF) waves in D(H) tokamak plasmas has been clearly observed for the first time in Alcator C-Mod. Both on- and off-axis (high field side) mode conversion electron heating (MCEH) have been observed. The MCEH profile was obtained from a break in slope analysis of electron temperature signals in the presence of rf (radio frequency) shut-off. The temperature was measured by a 32-channel high spatial resolution (7 mm) 2nd harmonic heterodyne electron cyclotron emission (ECE) system. The experimental profiles were compared with the predictions from a toroidal full-wave ICRF code TORIC. Using the hydrogen concentration measured by a high-resolution optical spectrometer, TORIC predictions were shown qualitatively in agreement with the experimental results for both on- and off-axis MC cases. From the simulations, the electron heating from mode converted ion cyclotron wave (ICW) and ion Bernstein wave (IBW) is examined.
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Localized direct electron heating by mode-converted ion cyclotron range of frequencies (ICRF) waves in D(H) tokamak plasmas has been clearly observed for the first time in Alcator C-Mod. Both on- and off-axis (high field side) mode conversion electron heating (MCEH) have been observed. The MCEH profile was obtained from a break in slope analysis of electron temperature signals in the presence of rf (radio frequency) shut-off. The temperature was measured by a 32-channel high spatial resolution (7 mm) 2nd harmonic heterodyne electron cyclotron emission (ECE) system. The experimental profiles were compared with the predictions from a toroidal full-wave ICRF code TORIC. Using the hydrogen concentration measured by a high-resolution optical spectrometer, TORIC predictions were shown qualitatively in agreement with the experimental results for both on- and off-axis MC cases. From the simulations, the electron heating from mode converted ion cyclotron wave (ICW) and ion Bernstein wave (IBW) is examined.
Heating and confinement in the ion cyclotron range of frequencies on the divertor tokamak ASDEX
Author:
Publisher:
ISBN:
Category :
Languages : de
Pages : 30
Book Description
Publisher:
ISBN:
Category :
Languages : de
Pages : 30
Book Description
Ion Cyclotron Frequency Range Coupling and Heating in Large Tokamaks
Author: H. Romero
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
ICRF Heating and Wave Generation in the ATC Tokamak. Part 1
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Experimental results and their theoretical interpretations of rf heating experiments in the ion cyclotron range of frequencies are presented. The presentation is in two parts, with this part describing the experimental facilities and characteristics of fast compressional Alfven waves in the tokamak, and a subsequent paper which will deal with the pricipal heating results. It is shown that a simple coupling structure which consists essentially of a semi-circular metal strip and a pair of bumper limiters is sufficient to efficiently couple rf power to the plasma. The major part of the coupled power is radiated as the fast wave, and there is no evidence that parasitic loading, if any, accounts for a significant amount of the power. A coupling efficiency (net coupled power/incident power) in excess of 90% is routinely obtained.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Experimental results and their theoretical interpretations of rf heating experiments in the ion cyclotron range of frequencies are presented. The presentation is in two parts, with this part describing the experimental facilities and characteristics of fast compressional Alfven waves in the tokamak, and a subsequent paper which will deal with the pricipal heating results. It is shown that a simple coupling structure which consists essentially of a semi-circular metal strip and a pair of bumper limiters is sufficient to efficiently couple rf power to the plasma. The major part of the coupled power is radiated as the fast wave, and there is no evidence that parasitic loading, if any, accounts for a significant amount of the power. A coupling efficiency (net coupled power/incident power) in excess of 90% is routinely obtained.
Heating and Confinement in the Ion Cyclotron Range of Frequencies on the Divertor Tokamak ASDEX
Author: K. Steinmetz
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 790
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 790
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.