Three-dimensional extreme ultraviolet emission from a droplet-based laser-produced plasma

2013 ◽  
Vol 114 (3) ◽  
pp. 033303 ◽  
Author(s):  
A. Z. Giovannini ◽  
Reza S. Abhari
Keyword(s):  
Extreme Ultraviolet ◽  
Three Dimensional ◽  
Ultraviolet Emission ◽  
Laser Produced Plasma

13.5nm extreme ultraviolet emission from tin based laser produced plasma sources

2006 ◽  
Vol 99 (9) ◽  
pp. 093302 ◽  
Author(s):  
Paddy Hayden ◽  
Anthony Cummings ◽  
Nicola Murphy ◽  
Gerry O’Sullivan ◽  
Paul Sheridan ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Emission ◽  
Plasma Sources ◽  
Laser Produced Plasma

scholarly journals Characteristics of Extreme Ultraviolet Emission from CO2 Laser-Produced Plasma

2007 ◽  
Vol 127 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Akihiko Takahashi ◽  
Hiroki Tanaka ◽  
Yuuki Hashimoto ◽  
Tatsuo Okada
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Emission ◽  
Laser Produced Plasma

Experimental and simulation study of impurity transport response to RMPs in RF-heated H-mode plasmas at EAST

2021 ◽  
Vol 87 (2) ◽  
Author(s):  
Germán Vogel ◽  
Hongming Zhang ◽  
Yongcai Shen ◽  
Shuyu Dai ◽  
Youwen Sun ◽  
...  
Keyword(s):  
Inner Core ◽  
Extreme Ultraviolet ◽  
Transport Coefficients ◽  
Three Dimensional ◽  
Line Emission ◽  
Core Region ◽  
Emission Mitigation ◽  
One Dimensional ◽  
Impurity Transport ◽  
Transport Code

Spatial profiles of impurity emission measurements in the extreme ultraviolet (EUV) spectroscopic range in radiofrequency (RF)-heated discharges are combined with one-dimensional and three-dimensional transport simulations to study the effects of resonant magnetic perturbations (RMPs) on core impurity accumulation at EAST. The amount of impurity line emission mitigation by RMPs appears to be correlated with the ion Z for lithium, carbon, iron and tungsten monitored, i.e. stronger suppression of accumulation for heavier ions. The targeted effect on the most detrimental high-Z impurities suggests a possible advantage using RMPs for impurity control. Profiles of transport coefficients are calculated with the STRAHL one-dimensional impurity transport code, keeping $\nu /D$ fixed and using the measured spatial profiles of $\textrm{F}{\textrm{e}^{20 + }}$ , $\textrm{F}{\textrm{e}^{21 + }}$ and $\textrm{F}{\textrm{e}^{22 + }}$ to disentangle the transport coefficients. The iron diffusion coefficient ${D_{\textrm{Fe}}}$ increases from $1.0- 2.0\;{\textrm{m}^2}\;{\textrm{s}^{ - 1}}$ to $1.5- 3.0\;{\textrm{m}^2}\;{\textrm{s}^{ - 1}}$ from the core region to the edge region $(\rho \gt 0.5)$ after the onset of RMPs. Meanwhile, an inward pinch of iron convective velocity ${\nu _{\textrm{Fe}}}$ decreases in magnitude in the inner core region and increases significantly in the outer confined region, simultaneously contributing to preserving centrally peaked $\textrm{Fe}$ profiles and exhausting the impurities. The ${D_{\textrm{Fe}}}$ and ${\nu _{\textrm{Fe}}}$ variations lead to reduced impurity contents in the plasma. The three-dimensional edge impurity transport code EMC3-EIRENE was also applied for a case of RMP-mitigated high-Z accumulation at EAST and compared to that of low-Z carbon. The exhaust of ${\textrm{C}^{6 + }}$ toward the scrape-off layer accompanying an overall suppression of heavier ${\textrm{W}^{30 + }}$ is observed when using RMPs.

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