Impurity Deposition on a First Mirror Surface during Hydrogen Discharges in LHD
First mirrors in fusion devices have to retain the reflectivity and the degradation mechanism and dominant plasma operations that affect the reflectivity have to be understood. The reflectivity of visible laser light (635 nm) of a corner cube mirror is almost entirely determined by the initial hydro...
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| Veröffentlicht in: | Plasma and fusion research 2015-01, Vol.8, p.1402092-1402092 |
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| container_title | Plasma and fusion research |
| container_volume | 8 |
| creator | Akiyama, Tsuyoshi Yoshida, Naoaki Tokitani, Masayuki Masuzaki, Suguru Kawahata, Kazuo Okajima, Shigeki Nakayama, Kazuya |
| description | First mirrors in fusion devices have to retain the reflectivity and the degradation mechanism and dominant plasma operations that affect the reflectivity have to be understood. The reflectivity of visible laser light (635 nm) of a corner cube mirror is almost entirely determined by the initial hydrogen glow discharges for wall conditioning before conducting a main plasma experiment in the Large Helical Devices (LHD). The hydrogen glow discharge forms a carbon deposition layer on the mirror surface, which degrades its reflectivity. A neon glow discharge and subsequent main discharges had less effect. |
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The reflectivity of visible laser light (635 nm) of a corner cube mirror is almost entirely determined by the initial hydrogen glow discharges for wall conditioning before conducting a main plasma experiment in the Large Helical Devices (LHD). The hydrogen glow discharge forms a carbon deposition layer on the mirror surface, which degrades its reflectivity. A neon glow discharge and subsequent main discharges had less effect.</abstract></addata></record> |
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| identifier | EISSN: 1880-6821 |
| ispartof | Plasma and fusion research, 2015-01, Vol.8, p.1402092-1402092 |
| issn | 1880-6821 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1835578099 |
| source | J-STAGE (Free - Japanese); EZB-FREE-00999 freely available EZB journals |
| subjects | Carbon Degradation Deposition Devices Glow discharges Hydrogen storage Reflectivity Walls |
| title | Impurity Deposition on a First Mirror Surface during Hydrogen Discharges in LHD |
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