Study of the Recoil Impulse of Gaseous Products of IR Laser Ablation of Polytetrafluoroethylene

The formation of laser thrust by the pressure of gases released from the crater of laser ablation of polytetrafluoroethylene in vacuum has been studied, and a model for calculating the mechanical recoil impulse of ablation products has been implemented on the basis of a gravimetric curve obtained us...

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Bibliographic Details
Published in:High energy chemistry 2022-02, Vol.56 (1), p.54-59
Main Authors: Frolov, I. A., Allayarov, S. R., Tolstopyatov, E. M., Utkin, A. V., Grakovich, P. N., Ivanov, L. F., Makarenko, V. M.
Format: Article
Language:English
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Summary:The formation of laser thrust by the pressure of gases released from the crater of laser ablation of polytetrafluoroethylene in vacuum has been studied, and a model for calculating the mechanical recoil impulse of ablation products has been implemented on the basis of a gravimetric curve obtained using an electronic balance that allows direct recording during intermittent (at 5-s intervals) or continuous irradiation for 5, 10, 15, 25, and 30 s with an infrared CO 2 laser. Regardless of the laser operation mode, the observed polymer weight loss by ablation is linearly related to the laser irradiation time, having a rate of 80 μN/s. The maximum mechanical recoil impulse, which appears on the gravimetric ablation curves 4.5 ± 0.3 s after the laser is switched on, is 145 ± 7 or 90 ± 20 μN s in the continuous or the intermittent irradiation mode, respectively. In this case, an increase in the time of laser irradiation of the polymer in both modes leads to an insignificant change in the specific mechanical recoil impulse within 2.76 ± 0.06 μN/J. The results of the study show the possibility of using a polytetrafluoroethylene target for laser thrust, and the method of calculating the force momentum from the gravimetric curve of ablation of polytetrafluoroethylene can be used to investigate the mechanism of laser ablation of other polymer targets.
ISSN:0018-1439
1608-3148
DOI:10.1134/S0018143922010040