Major results from the first plasma campaign of the Wendelstein 7-X stellarator.

0483588 - ÚFP 2018 RIV AT eng J - Článek v odborném periodiku
Wolf, R.C. - Preinhaelter, Josef - Urban, Jakub - Zajac, Jaromír … celkem 458 autorů
Major results from the first plasma campaign of the Wendelstein 7-X stellarator.
Nuclear Fusion. Roč. 57, č. 10 (2017), č. článku 102020. ISSN 0029-5515. E-ISSN 1741-4326
GRANT EU: European Commission(XE) 633053 - EUROfusion
Institucionální podpora: RVO:61389021
Klíčová slova: plasma * stellarator * technology * diagnostics * data acquisition * Wendelstein 7-X * electron cyclotron heating * electron Bernstein wave
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 4.057, rok: 2017
http://iopscience.iop.org/10.1088/1741-4326/aa770d

After completing the main construction phase of Wendelstein 7-X (W7-X) and successfully commissioning the device, first plasma operation started end of 2015. Integral commissioning of plasma start-up and operation using an electron cyclotron resonance heating (ECRH) and an extensive set of plasma diagnostics have been completed. Both in helium and hydrogen, plasma break-down was easily achieved. Gaining experience with plasma vessel conditioning, discharge lengths could be extended gradually. Eventually, discharges lasted up to 6 sec, reaching an injected energy of 4 MJ. Central electron temperatures reached values of 7 keV and ion temperatures reached just above 2 keV. Important physics studies during this first operational phase include a first assessment of power balance and energy confinement, ECRH power deposition experiments, 2nd harmonic O-mode ECRH using multi-pass absorption, and current drive experiments using electron cyclotron current drive (ECCD).
Trvalý link: http://hdl.handle.net/11104/0278878