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Web analytics is a process through which website usage statistics and user behavior data are gathered. Such an analytics program can be used as a tool to get anonym information about users, for example who they are, from which site are they are coming, how often they are visiting the website, how much time do they spent on a site, etc. In this paper we(More)
The stellarator Wendelstein 7-X will allow for quasicontinuous operation with the duration only being limited to two 30 min discharges per day, at a continuous heating power of 10 MW electron cyclotron resonance heating (ECRH) at 140 GHz, by the capacity of the cooling water reservoir. This will result in high thermal loads on all plasma facing components(More)
A method is presented for the routine analysis of amphetamine, methamphetamine, and related compounds in urine with gas chromatography coupled with mass spectrometry operated in the selective ion monitoring mode. The analytes are isolated by liquid-liquid extraction and are derivatized with trifluoroacetic anhydride. 3,4-Methylenedioxy-methamphetamine-D(5)(More)
An overview of the diagnostics which are essential for the first operational phase of Wendelstein 7-X and the set of diagnostics expected to be ready for operation at this time are presented. The ongoing investigations of how to cope with high levels of stray Electron Cyclotron Resonance Heating (ECRH) radiation in the ultraviolet (UV)/visible/infrared (IR)(More)
Gas chromatography combined with mass spectrometry is used to determine the urinary elimination of 11-nor-Delta(9)-tetrahydrocannabinol-carboxylic acid. Single ion monitoring of both 11-nor-Delta(9)-tetrahydrocannabinol-carboxylic acid and the internal standard (11-nor-Delta(9)-tetrahydrocannabinol-carboxylic-D9) offers selective and sensitive measurement.(More)
The page views of domestic advertising sites are one of the largest after social networking and online newspaper sites. Basically, we can make a distinction between two main types of measurement. One of them is the so-called -newspaper type” website where articles stay in the database in perpetuity. The system never deletes the users-data. The other(More)
Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed(More)
The status of the diagnostic developments for the quasistationary operable stellarator Wendelstein 7-X (maximum pulse length of 30 min at 10 MW ECRH heating at 140 GHz) will be reported on. Significant emphasis is being given to the issue of ECRH stray radiation shielding of in-vessel diagnostic components, which will be critical at high density operation(More)
The critical issues in the development of diagnostics, which need to work robust and reliable under quasi-steady state conditions for the discharge durations of 30 min and which cannot be maintained throughout the one week duration of each operation phase of the Wendelstein 7-X stellarator, are being discussed.
Experiments have been performed at ASDEX Upgrade, aiming to investigate the impact of lithium in an all-metal-wall tokamak and attempting to enhance the pedestal operational space. For this purpose, a lithium pellet injector has been developed, capable of injecting pellets carrying a particle content ranging from 1.82 × 10(19) atoms (0.21 mg) to 1.64 ×(More)