Figure 1
Schematic of the experiment.
A 800 nm, 50 fs laser pulse is focused, using an off-axis parabolic mirror, on the target. Inset shows the target surface geometry. Ions were detected using a Thomson parabola spectrometer at the target normal direction. dE and dB are the deflections of the charged particles due to the parallel electric and the magnetic field respectively. The TP was kept in a differentially pumped chamber maintained at a pressure of 10−7 torr, while the main experimental chamber was at 6 × 10−5 torr pressure.
