Abstract: Disclosed herein are methods, systems, and processes to detect rogue wireless access points and determine their approximate location in a geospatial location. Wireless access point data collected from wireless access points by fixed sensor nodes and agent-based sensor nodes in a geospatial location is received. A wireless site survey is performed at the geospatial location based on the wireless access point data. Based on the wireless site survey, an approximate location of a rogue wireless access point at the geospatial location is determined.

Abstract: Electron sources can include an electron source crystal coupled in series between opposing electrically conductive supports to form an electrically conductive path, wherein the electrical resistance of each of the electrically conductive supports is lower than the electrical resistance of the electron source crystal. Electron source crystals can include an emitting end and opposing shank end, wherein the shank end includes opposing leg portions. Electrically conductive supports can include foil supports spaced apart across a gap, wherein each of the opposing leg portions is attached to a respective foil support such that the foil supports are electrically connected to form the electrically conductive path. Particle focusing system are also disclosed. Electron sources can include an electron source crystal having an emitting end and opposing shank end, wherein the shank end is formed of a pair of opposing leg portions. Methods of manufacturing and operating electron sources are also disclosed.

Abstract: Electron sources can include an electron source crystal coupled in series between opposing electrically conductive supports to form an electrically conductive path, wherein the electrical resistance of each of the electrically conductive supports is lower than the electrical resistance of the electron source crystal. Electron source crystals can include an emitting end and opposing shank end, wherein the shank end includes opposing leg portions. Electrically conductive supports can include foil supports spaced apart across a gap, wherein each of the opposing leg portions is attached to a respective foil support such that the foil supports are electrically connected to form the electrically conductive path. Particle focusing system are also disclosed. Electron sources can include an electron source crystal having an emitting end and opposing shank end, wherein the shank end is formed of a pair of opposing leg portions. Methods of manufacturing and operating electron sources are also disclosed.