GHZ Electron Buncher Compatible With Commericals TEMS For Strobosopic Imaging With Space-time Resolution Between 10-23 And 10-20 M S (TOPIC 7A)

Currently, space-time resolution (STR) in the range 10-21 to 10-22 m∙s is available exclusively at free electron laser facilities, or by a few laser microscopes based on high harmonic generation. In practice, these tools have limited accessibility due to exorbitant equipment costs or meager beam time allocations. Because such record STR enables absolutely novel physics and emerging behavior in materials, these difficulties make it incredibly hard to accomplish large sets of experiments and cross validate new findings by the same group of researchers or within inter-laboratory collaborations. How the problem is being addressed: We propose to build the first prototype of a GHz stroboscopic TEM with STR ~10-20-10-23 m∙s, which is comparable or better than the STRs available at existing user facilities. Furthermore, the proposed system will be an affordable tool based on a standard TEM platform. This proposal is focused on bringing together two mature technologies, the CW-kicker-based electron buncher and the TEM, to make an accessible and fundamentally different stroboscopic instrument for imaging periodic processes. The new tool will have GHz sampling rate and time resolution in the 100 fs to 100 ps range, while preserving the unique spatial resolution of TEM. Unique measurements will become possible for many laboratories around the world to significantly improve technological outcome of scientific findings. What will be done in Phase I: In Phase I we will design and fabricate electromagnetic cavity buncher and perform its cold tests (to confirm target frequency and resonator quality factor) in that it is ready for installations in the existing TEM at BNL in Phase II. We will also provide electromagnetic design and electron beam dynamics simulation taking into account actual TEM architecture, and design synchronizing circuitry/electronics. Applications and benefits: Because electron microscopy is not only high spatial resolution imaging tool, but also a platform for a variety of analytical methods, such as EDS and EELS, there are endless application opportunities for GHz stroboscopic microscopy in energy and electronics research to resolve electron and ionic transport in advanced functional materials.