Measurements of Ion Temperature in the Edge Plasma of the COMPASS Tokamak
نویسندگان
چکیده
The ion temperature was estimated using measurements provided by optical system based on the two-grating spectrometer on the COMPASS tokamak. It was done by analysis of Doppler-broadened CIII spectral lines at about 465 nm. The ion temperature in the range of 30–35 eV was measured at the plasma edge in short low-current ohmic discharges.
منابع مشابه
Calculation of edge ion temperature and poloidal rotation velocity from carbon III triplet measurements on the COMPASS tokamak
Atomic spectroscopy can provide valuable information about fusion plasma. This is possible due to the fact that properties of radiated photons are governed by ion and electron velocity distributions and densities, electromagnetic fi elds, and ion species present in a plasma. Specifi cally, it can be used to calculate ion temperature and ion fl ow along magnetic fl ux surfaces in tokamaks called...
متن کاملEstimation of Plasma Light in Thomson Scattering System Designed for the COMPASS Tokamak
The COMPASS tokamak, originally from Culham laboratory, UKAEA, has been reinstalled at Institute of Plasma Physics, Prague. Many innovations will be done and new diagnostics have to be constructed. Electron temperature Te and density ne as key parameters of fusion plasma will be measured directly by the newly designed high spatial resolution incoherent Thomson scattering system. The scientific ...
متن کاملFirst Spectroscopic Measurements on the COMPASS Tokamak
Spectroscopic measurements were performed on the re-installed COMPASS tokamak during the first experiments. The impurity survey spectrometer HR 2000+ was used for registration of the most intense spectral lines in the 457–663nm visible range integrated over the discharge duration. The temporal evolution of integral visible light, Hα and hard X-rays intensities are measured by a photomultipliers...
متن کاملOBSERVATION OF THE HARD DISRUPTION INSTABILITY IN THE IR-TI (IRAN-TOKAMAK 1)
In this article, some diagnostic systems and the preliminary results of the IR-T1** (Iran-Tokamak 1) are presented. Different diagnostic methods, including an array of soft X-ray detectors, visible spectrometer, electron cyclotron emission detector and electromagnetic measurement systems have been used and the hard disruptive instability occurring in the IR-T1 plasma during an ohmic heating...
متن کاملThe effect of asymmetric gas puffing on toroidal flow in the edge of tokamak plasma
The neoclassical theory of toroidal plasma rotation in the presence of an asymmetric neutral gas source in the edge of tokamak is examined. The poloidal dependence of momentum damping and ion energy loss due to charge-exchange processes are included. It is shown that the toroidal flow velocity increases significantly if the gas is fueled from the inboard side of the tokamak; the radial electric...
متن کامل