Review of Scientific Instruments
Design and analysis of a new compensating element for improving the electron pulse front and compressing the pulse duration in a femtosecond photoelectron gun are described. The compensating element is a small metallic cylindrical cavity in which an external voltage is applied in such a way that a special electric field forms and interacts with the electron pulse. This electric field reduces the distances between the faster and slower electrons inside the cavity and efficiently compensates for electron pulse broadening caused by the photoelectron energy spread and space charge effects. Poisson's equation and the equation of motion are solved to obtain the electron trajectories. Results highlight the important design parameters of the new compensating element and show its feasibility in compressing electron pulses in the femtosecond regime. © 2001 American Institute of Physics. [DOI: 10.1063/1.1387254]
Original Publication Citation
Qian, B. L., & Elsayed-Ali, H. E. (2001). A new compensating element for a femtosecond photoelectron gun. Review of Scientific Instruments, 72(9), 3507-3513. doi:10.1063/1.1387254
Qian, Bao-Liang and Elsayed-Ali, Hani E., "A New Compensating Element for a Femtosecond Photoelectron Gun" (2001). Electrical & Computer Engineering Faculty Publications. 111.