High-repetition-rate time-resolved gas phase electron diffraction

Joseph D. Geiser; Peter M. Weber

doi:10.1117/12.218345

1 September 1995 High-repetition-rate time-resolved gas phase electron diffraction

Joseph D. Geiser, Peter M. Weber

Proceedings Volume 2521, Time-Resolved Electron and X-Ray Diffraction; (1995) https://doi.org/10.1117/12.218345
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Multiphoton emission and space-charge effects require the generation of electron pulses for ultrafast time-resolved electron diffraction experiments to be performed with low power lasers. Using mode-locked laser sources it is possible to generate a train of electron pulses containing several nanoamperes, while simultaneously minimizing the number of electrons per pulse. Experiments with CCl₄ demonstrates that this electron beam current is sufficient to record diffraction patterns from gas phase samples in modecular beams. To observe time dependent structural data one must subtract the diffraction signal obtained when the pump laser is on from that with the pump laser off. This imposes stringent requirements on the system noise and drift. We present a scheme to stabilize the electron current to 0.1%, and discuss a fast-gated detection scheme to subtract diffraction patterns while maintaining single particle counting efficiency.

Citation Download Citation

Joseph D. Geiser and Peter M. Weber "High-repetition-rate time-resolved gas phase electron diffraction", Proc. SPIE 2521, Time-Resolved Electron and X-Ray Diffraction, (1 September 1995); https://doi.org/10.1117/12.218345

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available