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Diamond Radiator Thinning Using an Excimer Laser (view source)
Revision as of 21:14, 15 December 2016
, 21:14, 15 December 2016→Focal Spot Characterization
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*Projections of the color maps shown in Figure 6 onto the transverse axis with Gaussian fits to central peak over a flat background.]]
*Projections of the color maps shown in Figure 6 onto the transverse axis with Gaussian fits to central peak over a flat background.]]
===Ablation Rate===
The ablation rate of diamond was studied over a wide range of laser
11
energies. This was accomplished by pulsing the laser at a constant rate of 50
Hz while sweeping the diamond across the focal spot at a speed of 0.5 mm
s
.
After each completed row the diamond was shifted by 10 µm (y translation
stage) and the process was repeated until a 6.2x6.2mm2 area was rastered.
For each row, the average laser pulse energy and the row’s y-coordinate on
the diamond was calculated and recorded . The laser was run without the
gas purification system and the laser energy dropped slowly as each row
was completed ensuring the study covered the complete energy range of the
excimer laser. The ablated surface of the diamond was measured using a
Zygo white-light interferometer and is shown below in Figure 9a
{| cellpadding="3" style="text-align:center; margin: 1em auto 1em auto"
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| [[Image:cutrate_raw.png|left|thumb|300px|Zygo image of 7mmx7mm diamond cut using laser operating 193nm with varying output energy]] || ||
[[Image:cutrate_fit.png|right|thumb|300px|Calculated ablation rate in diamond as a function of laser energy fit with a second order polynomial]]
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==Ablation Rate==
==Ablation Rate==