Theoretical simulation of thermal behavior in transient heat loads testing of plasma-facing materials

Li, Y.G.; Zhou, Wang-Huai; Huang, Liang‐Feng; Zeng, Zitao; Ju, Xin

doi:10.1016/j.fusengdes.2011.04.011

Cited by 7 publications

(4 citation statements)

References 41 publications

(75 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Curve slope could be taken equal to 0.58 with an accuracy of ± 5%. This value is consistent with the calculations [13], but differs by 10% from values used in works [3,6], where particles albedo was taken instead of the energy albedo. The maximum achievable energy content of the incident beam on the target during operation was of the order 1kJ.…”

Section: Resultssupporting

confidence: 86%

Heating of tungsten target by intense pulse electron beam

Trunev

Arakcheev

Burdakov

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 86%

Heating of tungsten target by intense pulse electron beam

Trunev

Arakcheev

Burdakov

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

“…The heat capacity C e given for a range of electron temperatures can be found in [20] and was obtained through ab initio calculations as described in [21]. The values used for the thermal conductivity are κ e = 174 W m −1 K −1 and 125 W m −1 K −1 at room temperature and at 800 K [22,23] respectively. Due to large uncertainty we assume no lattice temperature dependence in κ e and a constant value of g p .…”

Section: Methodsmentioning

confidence: 99%

Electronic effects in high-energy radiation damage in tungsten

Zarkadoula

Duffy

Nordlund

et al. 2015

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Although the effects of the electronic excitations during high-energy radiation damage processes are not currently understood, it is shown that their role in the interaction of radiation with matter is important. We perform molecular dynamics simulations of high-energy collision cascades in bcc-tungsten using the coupled two-temperature molecular dynamics (2T-MD) model that incorporates both the effects of electronic stopping and electron-phonon interaction. We compare the combination of these effects on the induced damage with only the effect of electronic stopping, and conclude in several novel insights. In the 2T-MD model, the electron-phonon coupling results in less damage production in the molten region and in faster relaxation of the damage at short times. These two effects lead to a significantly smaller amount of the final damage at longer times.

show abstract

“…The friction coefficient γ p due to e-p interactions corresponds to a coupling parameter value of g p = 5.4822 × 10 18 W m −3 K −1 [39] and is set equal to 1.56 ps −1 . A value of κ e = 80.2 W m −1 K −1 for the thermal conductivity at room temperature [42] is used.…”

Section: Simulationsmentioning

confidence: 99%

Electronic effects in high-energy radiation damage in iron

Zarkadoula¹,

Daraszewicz²,

Duffy³

et al. 2014

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Electronic effects have been shown to be important in high-energy radiation damage processes where a high electronic temperature is expected, yet their effects are not currently understood. Here, we perform molecular dynamics simulations of high-energy collision cascades in α-iron using a coupled two-temperature molecular dynamics (2T-MD) model that incorporates both the effects of electronic stopping and electron-phonon interaction. We subsequently compare it with the model employing electronic stopping only, and find several interesting novel insights. The 2T-MD results in both decreased damage production in the thermal spike and faster relaxation of the damage at short times. Notably, the 2T-MD model gives a similar amount of final damage at longer times, which we interpret to be the result of two competing effects: a smaller amount of short-time damage and a shorter time available for damage recovery.

show abstract

Theoretical simulation of thermal behavior in transient heat loads testing of plasma-facing materials

Cited by 7 publications

References 41 publications

Heating of tungsten target by intense pulse electron beam

Heating of tungsten target by intense pulse electron beam

Electronic effects in high-energy radiation damage in tungsten

Electronic effects in high-energy radiation damage in iron

Contact Info

Product

Resources

About