1 / 1

Pump pulse

Nano-patterned photocathode. Photoemission pulse. Extraction grid (10-100kV). High-power ultrafast laser. Synchronized RF pulse compression cavity. Pump pulse. Objective lens. Time delay. Sample. Pulsed electron beam from MHz laser-driven photocathode. Imaging lenses. Detectors.

marlo
Download Presentation

Pump pulse

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nano-patterned photocathode Photoemission pulse Extraction grid (10-100kV) High-power ultrafast laser Synchronized RF pulse compression cavity Pump pulse Objective lens Time delay Sample Pulsed electron beam from MHz laser-driven photocathode Imaging lenses Detectors Development of an Ultrafast Electron Microscope with <1nm-ps Spatio-temporal ResolutionW. Andreas Schroeder, University of Illinois at Chicago – Davis, DMR 0619573 Concept: To combine the high spatial resolution of today’s electron microscopes with the high temporal resolution afforded by ultrashort-pulse lasers into an instrument capable of directly visualizing fundamental dynamic processes on the nano-scale; e.g., in nano-science and materials science. • Key research challenges: • Generation of a high-quality ultra-short • electron pulse through the use of a • resonantly-laser-driven nano-patterned • photocathode operating on the same • principle as phased-array radar. • Avoidance and compensation of space- • charge effects to assure attainment of sub- • 1nm.ps space-time resolution by appropriate • design of microscope column and electron • optics (lenses). • Development of efficient electron detection • techniques to facilitate rapid data acquisition • in an operational ultrafast electron • microscope.

More Related