Coincidence ion imaging with a fast frame camera
Abstract
A new time- and position-sensitive particle detection system based on a fast frame CMOS (complementary metal-oxide semiconductors) camera is developed for coincidence ion imaging. The system is composed of four major components: a conventional microchannel plate/phosphor screen ion imager, a fast frame CMOS camera, a single anode photomultiplier tube (PMT), and a high-speed digitizer. The system collects the positional information of ions from a fast frame camera through real-time centroiding while the arrival times are obtained from the timing signal of a PMT processed by a high-speed digitizer. Multi-hit capability is achieved by correlating the intensity of ion spots on each camera frame with the peak heights on the corresponding time-of-flight spectrum of a PMT. Efficient computer algorithms are developed to process camera frames and digitizer traces in real-time at 1 kHz laser repetition rate. We demonstrate the capability of this system by detecting a momentum-matched co-fragments pair (methyl and iodine cations) produced from strong field dissociative double ionization of methyl iodide.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2014
- Source ID
- 10.1063/1.4903856
Entities
People
- Alexander H. Winney
- Fadia Cudry
- Lin Fan
- Steven Lingenfelter
- Suk Kyoung Lee
- Wen Li
- Yun Fei Lin
Organizations
- Alfred P. Sloan Foundation
- Army Research Office
- Wayne State University