F. Penzel
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View article: Multi-X-point radiation and its dynamics in up/down asymmetry in plasma detachment regimes in Wendelstein 7-X
Multi-X-point radiation and its dynamics in up/down asymmetry in plasma detachment regimes in Wendelstein 7-X Open
In Wendelstein 7-X (W7-X), stable plasma detachment in ECRH hydrogen plasmas is routinely achieved with the standard magnetic configuration, containing five magnetic islands in the scrape-off layer (SOL). Plasma detachment induced by intri…
View article: Calibration and thermal test results of prototype bolometer sensors for ITER fusion reactor
Calibration and thermal test results of prototype bolometer sensors for ITER fusion reactor Open
For over 10 years, several bolometer sensors with different properties have been tested in the IBOVAC facility. The aim has been to develop a bolometer sensor that can be operated in ITER and can withstand harsh operating conditions. For t…
View article: Bolometer sensor holder suitable for ITER-relevant conditions
Bolometer sensor holder suitable for ITER-relevant conditions Open
The ITER bolometer diagnostic shall provide the measurement of the total radiation emitted from the plasma, a part of the overall energy balance. Up to 550 lines-of-sight will be installed in ITER in 71 cameras of various sizes and types. …
View article: Final design of the ITER bolometer first plasma component: cable installation template
Final design of the ITER bolometer first plasma component: cable installation template Open
The ITER bolometer cable installation template is a first plasma component which main function is to provide a temporary fixation of the mineral insulated cables and to protect them through first plasma operation inside the vacuum vessel u…
View article: Plasma radiation behavior approaching high-radiation scenarios in W7-X
Plasma radiation behavior approaching high-radiation scenarios in W7-X Open
The W7-X stellarator has so far performed experiments under both limiter and divertor conditions. The plasma is mostly generated by ECR-heating with powers up to 6.5 MW, and the plasma density is usually limited by the radiation losses fro…
View article: Bolometer tomography on Wendelstein 7-X for study of radiation asymmetry
Bolometer tomography on Wendelstein 7-X for study of radiation asymmetry Open
The algorithm for bolometer tomography at Wendelstein 7-X (W7-X) has been recently improved using a novel regularization functional, based on relative gradient smoothing (RGS) of the sought radiation profile. It has been validated using ra…
View article: Bolometer developments in diagnostics for magnetic confinement fusion
Bolometer developments in diagnostics for magnetic confinement fusion Open
The plasma radiation is an essential part of the power balance in current and future magnetic confinement fusion experiments and gives crucial insight for the challenges of power exhaust and divertor detachment as well as valuable informat…
View article: Overview Of The R&D Activities For The Iter Bolometer Diagnostic
Overview Of The R&D Activities For The Iter Bolometer Diagnostic Open
The detailed development of the ITER bolometer diagnostic has recently been started.The aim is to reach a level from which on built-to-print drawings for the diagnostic components can be produced.Based on the challenges and corresponding r…