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Initial experiments with liquid target materials in PSI-2 and TEXTOR

Initial experiments with liquid target materials in PSI-2 and TEXTOR

Initial experiments with liquid target materials in PSI-2 and TEXTOR

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Sn mass loss <strong>in</strong> dur<strong>in</strong>g exposure<br />

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Total loss: 240 mg (of 1139mg)<br />

Surface temperature needed<br />

for evaporation of 240 mg:<br />

1120°C (full area)<br />

“effective erosion yield”:<br />

Y=0.15 >> Y sputter<br />

Penetration depth of Sn atoms:<br />

λ= 1.7 cm, E k<strong>in</strong> =1.5 eV >> E k<strong>in</strong><br />

=0.15 eV (evaporated Sn)<br />

Ø Indicat<strong>in</strong>g sputtered particles<br />

§<br />

SnI <strong>in</strong>tensity ris<strong>in</strong>g dur<strong>in</strong>g<br />

<strong>in</strong>crease of <strong>target</strong> temperature,<br />

<strong>in</strong>dication of temperature<br />

enhanced erosion?<br />

Intensity distribution SnI (380 nm)<br />

<strong>target</strong><br />

September 9th, 2013<br />

B. Unterberg | Institut für Energie- und Klimaforschung – Plasmaphysik, Forschungszentrum Jülich Nr. 15

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