Figure 2: The processes
implemented in the endPoint function in a time resolved acquisition of
Foram-72-shot-3 as a visualisation of the returned data frame $df.
Panel (a) visualises the entire raw 44Ca data
collected; panel (b) visualises the background corrected44Ca with the first 35 seconds removed as this was
before the laser was turned on and the ablated material is still
travelling through the system and this is the data frame passed into the
endPoint function; plot (c) visualises the target data retained after
running the endPoint function, with both the first 35 seconds and post
endPoint detection 44Ca data removed.
Figure 3 shows the manual validation tools to check that the endPoint
function had successfully identified when the laser had burnt through
the entire depth of the test wall. The black line is a scaled
transformation of the smoothed signal specified in signalCol; the blue
line is the scaled rate of change in signal over the moving time window
and the shaded red areas identify the data points removed from the
returned data frame, $df, as these exceed the end point blast through
detection time stamp.