Identification of isomers and control of ionization and dissociation processes using dual-mass-spectrometer scheme and genetic algorithm optimization*
Chen Zhou, Qiu-Nan Tong, Zhang Cong-Cong, Hu Zhan†
       
Schematic diagram of the experimental setup. The pulse shaping setup is placed between oscillator and amplifier, which includes lens (Le), grating (Gr), mirror (Mi), and SLM. The shaped pulse from the amplifier is split into two identical beams by a semipermeable mirror (SMi). Two identical lenses focus respectively the two laser beams into vacuum chambers of the two sets of TOF mass spectrometers. A half-wave plate (HWP) and a Glan prism (GP) are placed in front of each lens for adjusting the laser intensity. The gas handling, and ion detection system for each TOF mass spectrometer include a nozzle (NO) and a microchannel plate (MCP). The electronic devices include two oscilloscopes (OSs), two preamplifiers (PAs), two high voltage supplies (HVs), and a computer (PC).