A5011952480- Radiation Detection and Scintillator Technologies
- Laser-Plasma Interactions and Diagnostics
- Advanced Chemical Physics Studies
- Laser-Matter Interactions and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Ocular and Laser Science Research
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
Shenzhen University
2005-2020
Lawrence Livermore National Laboratory
1972
Interruption of a dc x-ray beam by projectile has been used to produce timing pulse for light-gas gun work. A finely collimated from conventional generator intersects the path at muzzle. This is detected detector consisting thin NaI(Tl) scintillator, splitter, and two photomultiplier tubes. The projectile, as it leaves barrel, interrupts beam; this results in current drop Associated electronics convert into single electrical pulse. Response time approximately 3 μsec.
A pulse dilation photomultiplier tube (PD-PMT) has been developed. The photoelectrons energy is modulated by a time-dependent electric field between photocathode and ground mesh. Then, the photoelectron dilated as it transits in relatively long drift region from mesh to microchannel plate (MCP). electron gained MCP then detected output collector. Because temporal width magnified, resolution of better than that collector alone. result shows detector improved be 25 ps using pulse-dilation...
A novel measuring implementation based on second-harmonic generation frequency-resolved optical gating (SHG-FROG) has been presented. Both the intensity and phase of arbitrary-shaped ultra-short laser pulses can be got. According to SHG-FROG, femtosecond pulse produced by a resource is split into two beams which variable time delay one another controlled stepped electromotor. The signal field generated focusing these 100um BBO crystal. Changing from 0 N (N samples number domain or frequency...