Surface Characterization and Field Emission Measurements of Copper Samples inside a Scanning Electron Microscope
2016 (English)Conference paper (Refereed)
Vacuum breakdown in normal-conducting accelerating structures is a limiting factor for high gradient acceleration.Many aspects of the physics governing the breakdown process and its onset are yet to be fully understood. At Uppsala University we address these questions with an in-situ experi-mental setup mounted in an environmental scanning electron microscope. It consists of a piezo motor driven tungsten needle and a sample surface mounted on a piezo stage, allowing for nano-meter 3D-position control. One of the piezomotors controls the needle-sample gap while the two otherscan across the surface. A DC-voltage up to 1 kV is applied across the gap and field emission currents from a coppersurface are measured with an electrometer. Here we presentthe setup and some initial results.
Place, publisher, year, edition, pages
2016. 2083-2085 p.
Accelerator Physics and Instrumentation Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-298811OAI: oai:DiVA.org:uu-298811DiVA: diva2:947498
the 7th International Particle Accelerator Conference IPAC16 in Busan, South Korea, May 2016