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Line 42: − *Color maps of the two orthoganol scans of beam focal region, where the color represents the charge per pulse seen on the wire in arbitrary units. Line 48:
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Diamond Radiator Thinning Using an Excimer Laser (view source)
Revision as of 21:32, 15 December 2016
, 21:32, 15 December 2016→Focal Spot Characterization
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*Color maps of the two orthoganol scans of beam focal region, where the color represents the charge per pulse seen on the wire in arbitrary units.
*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.]]
Each pixel in the plots shown in Figures 7 represents one laser pulse, with the color representing the pulse height integral. The lower-most row should be ignored because the scanning program was not yet fully synchronized to the raster pattern. The widths of the focal spot in x and y are shown in the RMS values of the fits in Figure 8. The values in x and y are roughly the same, 65 µm vs 48 µm respectively. Figure 7a shows a maximum intensity at a z position of 4.8mm, however it is interesting to note that the shape of the focal spot does not appear to change drastically away from this point. The optical setup has a narrow focal spot with a wide depth of field which is ideal for the purpose of laser ablation. From this study it was also concluded that the use of a collimator at the focal point of L1 and L2 greatly reduced the background seen by the harp scan and should be used during the ablation process to protect the diamond surface away from the ablation point
Each pixel in the plots shown in Figures 7 represents one laser pulse, with the color representing the pulse height integral. The lower-most row should be ignored because the scanning program was not yet fully synchronized to the raster pattern. The widths of the focal spot in x and y are shown in the RMS values of the fits in Figure 8. The values in x and y are roughly the same, 65 µm vs 48 µm respectively. Figure 7a shows a maximum intensity at a z position of 4.8mm, however it is interesting to note that the shape of the focal spot does not appear to change drastically away from this point. The optical setup has a narrow focal spot with a wide depth of field which is ideal for the purpose of laser ablation. From this study it was also concluded that the use of a collimator at the focal point of L1 and L2 greatly reduced the background seen by the harp scan and should be used during the ablation process to protect the diamond surface away from the ablation point