Strong‐field ionization of C 60 sputtered neutral molecules using 10 15 W/cm 2 of fs IR radiation

Implementation of a new high energy, IR laser source for secondary neutral mass spectrometry, is presented. It consists of an 800 nm, 40 fs, 10 mJ, 1 kHz laser pumping an optical parametric amplifier generating 1.2–2.6 µm tunable pulses. The wavelength and intensity dependence of photoionized sputtered indium clusters and gas‐phase histamine are presented, exhibiting less nonadiabatic multielectron dynamics (decreased fragmentation) at longer wavelength. Future prospects for secondary neutral bioimaging experiments are explored with a model system consisting of a 400 mesh grid, vapor deposited with adenine, and fixed over indium foil.