Soft X-ray spectra in regimes with low plasma density and temperature at the L-2M stellarator

Soft X-ray plasma emission spectra were measured at the L-2M stellarator in OH regime with low density (ne ? 1019 m-3) and temperature (?200–400 eV). It is demonstrated that on spectra, there no dip energy range corresponding to several thermal energies of electrons or higher. This means stellarator, "X-ray dip" phenomenon not observed, as it was T-11M tokamak. In axial ECRH heating power PECRH = 250 kW, soft also measured. this case, observed too.