Observations of the breakthrough phase of attachment process in laboratory long sparks

<p>The data supports the manuscript entitled &quot;Observations of the breakthrough phase of attachment process in laboratory long sparks&quot;.&nbsp;&nbsp;The *.xlsx file contains the applied voltage waveform and discharge current waveform, and can be opened by Excel. The *.rar file contains the&nbsp;high-speed video frames, and can be decompressed and opened. The data can be used freely for scientific purposes with appropriate citation.</p>