Physics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988asde.nasa...41s&link_type=abstract
In its ASDEX Contributions to the DPG Fruehjahrstagung p 41-44 (SEE N89-11534 02-75)
Physics
Emission Spectra, Plasma Diagnostics, Protons, Tokamak Devices, Tritons, Ion Temperature, Spectroscopic Analysis, Temperature Measurement
Scientific paper
A diagnostic method was developed on ASDEX to measure the charged fusion products from the d-d-reactions with semiconductor detectors. Protons and tritons can be detected and it is possible to determine the ion temperature Ti from both of the species using the formula Delta E = 91.6 sq rt Ti where Delta E and Ti are the FWHM of the Doppler contribution to the width of the spectrum of protons and tritons and the ion temperature, respectively, both in keV. Spectra could only be obtained for OH-, LH-, and NI(H in D)-heated ASDEX plasmas at low heating power levels. Since the triton spectra suffer more from hard X-ray contributions and energy straggling than the protons, the temperature values deduced from the triton spectra are more uncertain than those from the protons. To improve these points, a shielding box of Pb and Cu mounted around the detector system, thinner foils to lower energy loss and straggling, and a double detector arrangement to substract the magnetic field effects are applied.
Bosch H.-S.
Schumacher U.
Simmet E.
Stroth U.
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