Hydrogen inventories in nuclear fusion devices

Mayer, M.; Philipps, V.; Wienhold, P.; Esser, H. G.; Seggern, J. von; Rubel, M.

doi:10.1016/s0022-3115(00)00486-4

Cited by 96 publications

(75 citation statements)

References 37 publications

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“…Gas balance integrated over the campaign shows that ~10% of the gas injection is retained, giving a retention rate of 10 20 D/s, while post mortem analyses yields a retention rate of 3.6×10 19 D/s [11]. The particle flux on the limiter is estimated to be in the range 3×10 21 D/s 10 22 D/s [12].…”

Section: Textormentioning

confidence: 97%

Multi machine scaling of fuel retention in 4 carbon dominated tokamaks

Tsitrone¹,

Pégouriè²,

Marandet³

et al. 2011

Journal of Nuclear Materials

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Section: Textormentioning

confidence: 97%

Multi machine scaling of fuel retention in 4 carbon dominated tokamaks

Tsitrone¹,

Pégouriè²,

Marandet³

et al. 2011

Journal of Nuclear Materials

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“…The tiles were analyzed again after exposure using RBS under the same conditions, thus providing information about the change of the marker layer thickness and material deposition on the marker [10,11]. Deuterium was detected by nuclear reaction analysis (NRA) using the D( 3 He,p) 4 He reaction at dierent incident energies [14]. NRA was also applied for detection of C using the 12 C( 3 He,p 1 ) 14 N reaction at 2500 keV incident en-ergy.…”

Section: Wall Materialsmentioning

confidence: 99%

Carbon balance and deuterium inventory from a carbon dominated to a full tungsten ASDEX Upgrade

Mayer

Rohde

Sugiyama

et al. 2009

Journal of Nuclear Materials

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The evolution of carbon/boron deposition and the deuterium inventory were determined during the transition from a carbon dominated to a full tungsten ASDEX Upgrade. In the carbon dominated machine about 17 g of carbon were deposited at the inner divertor and in remote areas during one standard discharge campaign. Main carbon sources were the ICRH antennae protection limiters in the main chamber. After coating these limiters with tungsten the carbon deposition decreased to 35 g. The remaining carbon originated mainly from erosion at the outer divertor strike point. Transition to a full tungsten machine resulted in a further decrease of the carbon deposition to about 1 g. 1.31.7 g deuterium was trapped in codeposited carbon/boron layers in the divertor and in remote areas during the carbon dominated campaigns. The deuterium inventory decreased to 0.140.22 g in the full tungsten machine.

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“…In addition, interaction of hydrogen atoms with graphitic compounds has been playing an important role in a number of fields as diverse as nuclear fusion, 6,7 hydrogen storage, 8 and interstellar chemistry. 9 In material design for hydrogen storage, several carbonbased structures have been proposed as candidates, 8 in particular, in connection with the spillover effect following embedding of metallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Understanding adsorption of hydrogen atoms on graphene

Casolo

Løvvik

Martinazzo

et al. 2009

The Journal of Chemical Physics

337

375

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Adsorption of hydrogen atoms on a single graphite sheet ͑graphene͒ has been investigated by first-principles electronic structure means, employing plane-wave based periodic density functional theory. A 5 ϫ 5 surface unit cell has been employed to study single and multiple adsorptions of H atoms. Binding and barrier energies for sequential sticking have been computed for a number of configurations involving adsorption on top of carbon atoms. We find that binding energies per atom range from ϳ0.8 to ϳ1.9 eV, with barriers to sticking in the range 0.0-0.15 eV. In addition, depending on the number and location of adsorbed hydrogen atoms, we find that magnetic structures may form in which spin density localizes on a ͱ 3 ϫ ͱ 3R30°sublattice and that binding ͑barrier͒ energies for sequential adsorption increase ͑decrease͒ linearly with the site-integrated magnetization. These results can be rationalized with the help of the valence-bond resonance theory of planar conjugated systems and suggest that preferential sticking due to barrierless adsorption is limited to formation of hydrogen pairs.

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Hydrogen inventories in nuclear fusion devices

Cited by 96 publications

References 37 publications

Multi machine scaling of fuel retention in 4 carbon dominated tokamaks

Multi machine scaling of fuel retention in 4 carbon dominated tokamaks

Carbon balance and deuterium inventory from a carbon dominated to a full tungsten ASDEX Upgrade

Understanding adsorption of hydrogen atoms on graphene

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