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Small‐scale laser effects experiments on graphite: Coupling coefficient, lateral loss, and effective heat of ablation
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2.At the Naval Ordnance Laboratory (now the Naval Surface Weapons Center) and named after that institution.
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13.This assumes based on an equilibrium distribution of carbon‐vapor species generated by ablation at 3600 K, as calculated from JANAF thermochemicai data. If, however, alternate carbon vapor‐pressure data as reported in Ref. 10 are adopted, the calculated value of drops to roughly 24.5 kJ/g.
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16.If the condition applies, the lateral loss irradiance relates to in a very simple manner: which holds, in particular, for “flood‐loaded” targets.
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20.Different reflectivity standards were used over the period of these experiments. The data shown in Fig. 3, which were obtained by calibration with a commercial diffuse gold reflectivity standard, are believed to be accurate; older data for the same specimen thickness gave values in the 17–21% range.
21.D. W. Marquardt, J. Soc. Ind. Appl. Math. 11, 431 (1963).
22.Both n and p are “almost” compatible with Eq. (23), which may explain why, in the absence of thickness‐dependent data, the scaling law (29) was found applicable in the context of work described in Ref. 18.
23.C. M. Stickley, in Proceedings of the AIAA Laser Effects and Target Response Meeting (Defense Nuclear Agency, Washington, DC, 1985), pp. 189–199.
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25.M. Olsen and R. Raphael (private communication, The BDM Corporation, McLean, VA, 1986).
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