We report our observation of low frequency(LF)density fluctuation of microturbulence in KT-5 tokamak.Broad frequency and wavenumber power spectra are observed.The density fluctuation frequencies are found to be around...We report our observation of low frequency(LF)density fluctuation of microturbulence in KT-5 tokamak.Broad frequency and wavenumber power spectra are observed.The density fluctuation frequencies are found to be around a few hundred kHz,and at higher frequencies the fluctuation level rolls off as n^(2)(f)∝f^(-β) with β=1-3.The wavenumber power spectrum S(k)can be fitted into S(k)∝k^(-α) with a around 3.0.展开更多
374μm far-infrared raliation of ^(15)NH_(3) pumuped by CO_(2) laser has been studied experineutally.The fficiecncy of p11 alosorption of the pounp bean.stability of the output power aund freqpeuey were exiuined in de...374μm far-infrared raliation of ^(15)NH_(3) pumuped by CO_(2) laser has been studied experineutally.The fficiecncy of p11 alosorption of the pounp bean.stability of the output power aund freqpeuey were exiuined in detail.Fur the plurpose of applixution in the plasi1n diagnostirs,n copurisou with 432μm of the formic acid laser was also carried out..展开更多
Microturbulence density fluctuations with drift-wave characteristics in KT-5B tokamak were investigated.The density fluctuation power spectrum S(k_(⊥))can be fitted into S(k_(⊥))∝k_(⊥)^(-α),in whichαis in invers...Microturbulence density fluctuations with drift-wave characteristics in KT-5B tokamak were investigated.The density fluctuation power spectrum S(k_(⊥))can be fitted into S(k_(⊥))∝k_(⊥)^(-α),in whichαis in inverse proportion to the toroidal magnetic field BT.Both averaged frequency and width(FWHM)of the frequency spectrum are increasing functions of BT.The phase velocity from the statistical dispersion is larger for k_(⊥)<20cm^(-1) than that for k_(⊥)≥20cm^(-1).展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘We report our observation of low frequency(LF)density fluctuation of microturbulence in KT-5 tokamak.Broad frequency and wavenumber power spectra are observed.The density fluctuation frequencies are found to be around a few hundred kHz,and at higher frequencies the fluctuation level rolls off as n^(2)(f)∝f^(-β) with β=1-3.The wavenumber power spectrum S(k)can be fitted into S(k)∝k^(-α) with a around 3.0.
文摘374μm far-infrared raliation of ^(15)NH_(3) pumuped by CO_(2) laser has been studied experineutally.The fficiecncy of p11 alosorption of the pounp bean.stability of the output power aund freqpeuey were exiuined in detail.Fur the plurpose of applixution in the plasi1n diagnostirs,n copurisou with 432μm of the formic acid laser was also carried out..
基金Supported by National Natural Science Foundation of China.
文摘Microturbulence density fluctuations with drift-wave characteristics in KT-5B tokamak were investigated.The density fluctuation power spectrum S(k_(⊥))can be fitted into S(k_(⊥))∝k_(⊥)^(-α),in whichαis in inverse proportion to the toroidal magnetic field BT.Both averaged frequency and width(FWHM)of the frequency spectrum are increasing functions of BT.The phase velocity from the statistical dispersion is larger for k_(⊥)<20cm^(-1) than that for k_(⊥)≥20cm^(-1).
