z-logo
open-access-imgOpen Access
EXPERIMENTAL INVESTIGATION ON PROPERTIES OF E. C. H. PLASMA AND HOT ELECTRON RING
Author(s) -
Guan Weishu,
Wang Enyao,
Cheng Shi-Qing,
Duan Shuyun,
Wang Ji-Hai,
Gu B,
Shang Zhenkui
Publication year - 1989
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.38.228
Subject(s) - plasma , gyrotron , radius , diamagnetism , atomic physics , electron , electron temperature , materials science , torr , ring (chemistry) , arc (geometry) , physics , magnetic field , nuclear magnetic resonance , chemistry , nuclear physics , computer security , geometry , organic chemistry , mathematics , quantum mechanics , computer science , thermodynamics
The ECRH experiment has been carried out on a simple mirror-MM-2 device by use of a 15 GHz high power gyrotron. The experimental results showed that the preionization time will be rapidly shorten following raising the pressure of puffed gas. Duing the "C-mode" operation where the gas pressure is higher, the radial profile of plasma density exhibits a saddle shape. The gas "pressure window" for building a hot electron ring is (0.4-1.2)×10-5 Torr, as the gyrotron output is about 30 kW. Simply by using a movable Langmuire probe accompanied with diamagnetic measurment. it has been determined that the hot electron ring radius is 7 cm, the thickness is about 4 cm and the axial boundary of the ring extends from Z= ±10 cm to Z=±20cm, when the central field is 2.95kg. The hot electron temperature is 140 to 170 keV. The average beta value of hot electron ring is (4-5)%. The radial bursts of electrons due to ring instabilities accompanied with the drops of the diamagnetic signal have also been observed.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here