581
edits
Changes
Jump to navigation
Jump to search
Line 77:
Line 77: − [[Image:r0(2)r0(1).jpg|right|thumb|117px|Original Beam Profile]] [[Image:r2.png|right|thumb|117px|Focused Beam Profile]]+ − + − + + + + Line 88:
Line 91: − + − − − − Line 101:
Line 100: + + + + + + +
Diamond Radiator Thinning Using an Excimer Laser (view source)
Revision as of 18:25, 23 April 2010
, 18:25, 23 April 2010→Updates for April 2010
*A fluorine resistant regulator will be purchased by the first week in April.
*A fluorine resistant regulator will be purchased by the first week in April.
==Updates for April 2010==
==Updates for April 2010==
*A FORTRAN program has been written which simulates rays exiting the laser aperture and then propagating through a fused silica plano-convex lens. Using this program we can now observe the geometry of the beam as it passes through the focusing lens onto a target. We have seen that the beam leaving the laser aperture has a flat top distribution in the X plane and a Gaussian distribution in the Y. As the beam is focused both the X and Y projections achieve Gaussian distributions.
*A FORTRAN program has been written which simulates rays exiting the laser aperture and then propagating through a fused silica plano-convex lens. Using this program we can observe the geometry of the beam as it passes through the focusing lens onto a target. We have seen that the beam leaving the laser aperture has a flat top distribution in the X plane and a Gaussian in the Y. As the beam is focused projections close to the waist show both the X and Y projections going Gaussian.
{| cellpadding="3" style="text-align: margin: 1em auto 1em auto"
|-
| [[Image:r0(2)r0(1).jpg|right|thumb|117px|Original Beam Profile]] || || [[Image:r2.png|right|thumb|117px|Focused Beam Profile]]
|-
|}
*Taking the X and Y projections of the focused beam and fitting them with a Gaussian distribution,
*Taking the X and Y projections of the focused beam and fitting them with a Gaussian distribution,
{| cellpadding="3" style="text-align: margin: 1em auto 1em auto"
{| cellpadding="3" style="text-align: margin: 1em auto 1em auto"
|-
|-
|}
|}
we are able to attain <math>\sigma_{X} = 0.63mm\,</math> and <math>\sigma_{Y} = 0.23mm \,</math>.
we are able to attain <math>\sigma_{X}\,</math> and <math>\sigma_{Y} \,</math>.
*Assuming a Gaussian distribution at the waist of the beam, we now find the FWHM (full width at half maximum) by the following relation,
*Assuming a Gaussian distribution at the waist of the beam, we now find the FWHM (full width at half maximum) by the following relation,
*Plotting <math>\mathrm\omega_{R}</math> as a function of distance away from the beam waist center, we find an average Rayleigh Length,
*Plotting <math>\mathrm\omega_{R}</math> as a function of distance away from the beam waist center, we find an average Rayleigh Length,
:<math>\mathrm{Z_{RX}} =11.8mm</math> and <math>\mathrm{Z_{RY}} =10.5mm</math>
:<math>\mathrm{Z_{RX}} =11.8mm</math> and <math>\mathrm{Z_{RY}} =10.5mm</math>
{| cellpadding="3" style="text-align: margin: 1em auto 1em auto"
|-
| [[Image:x_beam.png|right|thumb|117px|Waist of Beam through X-axis]] || ||
[[Image:y_beam.png|right|thumb|117px||Waist of Beam through Y-axis]]
|-
|}