Time-resolved shadowgraphs and morphology analyses of aluminum ablation with multiple femtosecond laser pulses<xref rid="cpb_27_7_077901fn1" ref-type="fn">*</xref><fn id="cpb_27_7_077901fn1"> <label>*</label><p>Project supported by the Science and Technology Development Fund Planning Project for the Universities of Tianjin, China (Grant No. 20140902), the Natural Science Foundation of Tianjin City, China (Grant No. 16JCQNJC01900), the National Natural Science Foundation of China (Grant Nos. 51376136 and 61474082), and the Science and Technology Achievement Award Project for the Universities of Tianjin, China.</p></fn>

Time-resolved shadowgraphs and morphology analyses of aluminum ablation with multiple femtosecond laser pulses* *

Project supported by the Science and Technology Development Fund Planning Project for the Universities of Tianjin, China (Grant No. 20140902), the Natural Science Foundation of Tianjin City, China (Grant No. 16JCQNJC01900), the National Natural Science Foundation of China (Grant Nos. 51376136 and 61474082), and the Science and Technology Achievement Award Project for the Universities of Tianjin, China.

Wu Zehua^{1, †}, Zhang Nan^{2, ‡}, Zhu Xiaonong², An Liqun¹, Wang Gangzhi¹, Tan Ming¹

(color online) Radius of the shock wave along the normal direction of the target surface as a function of the ordinal of 50-fs laser pulses of 0.22 mJ, striking the target under 1 atm, for different delay times.