LAPPD Figures for Papers and Talks

 43The geometry of the coupling between the coaxial cable from the pulse generator to the anode strip before modification 42{The 3-tile anode used to measure bandwidth, attenuation, and impedance as a function of anode strip length. The connections between anode strips on neighboring tiles have been made by soldering small strips of copper to the silver silk-screened strips on the glass. 41 A zero-length tile' consisting of a pair of fanout cards, used to characterize the measurement system with no tile. 40 A single tile with a 229.1 mm-long 40-strip anode. The anode strips are connected at both ends to the fanout cards used for testing. 39The equivalent electrical HV and signal circuits of the strip-line anode. The silver strip-lines are fired onto the top surface of the glass plate that forms the bottom of the tile package. The sealed tiles (See Figure~\ref{fig:rich_frugal_tile}) sit on a copper sheet, which acts as the ground plane for the strip-line. Each strip-line is terminated in 50\ohm at each end. 38The basic structure of the glass LAPPD MCP-PMT detector. The sealed vacuum tube consists of a top window with the photocathode on the inner surface, an accelerating gap for the initial photo-electron, a pair of 20-cm-square MCPs in a chevron geometry that amplify the photo-electron by factors up to $5\times 10^7$, a gap after the output of the second MCP, and the anode that collects the exiting cloud' of electrons. The package is less than 15 mm thick. 37Modified Arisaka slide (Henry Frisch) 36Difference in capabilities between the glass and ceramic packages. (Jason McPhate) 35PSEC-4 sampling rate: measured and post-extraction simulated. (Eric) 32Anode/HV return path schematic. (Eric)