LAPPD Figures for Papers and Talks

Beforelauncher2

43

The geometry of the coupling between the coaxial cable
from the pulse generator to the anode strip before modification

Richn three tile anode3

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.

Richn zero tile anode3

41

A `zero-length tile'
consisting of a pair of fanout cards, used to
characterize the measurement system with no tile.

Richn single 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.

Eric equiv circuit v4

39

The 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.

Richn frugaltile crop

38

The 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.

Arisaka beaune v2

37

Modified Arisaka slide (Henry Frisch)

Space time%20resolution

36

Difference in capabilities between the glass and ceramic packages. (Jason McPhate)

Samplerate2

35

PSEC-4 sampling rate: measured and post-extraction simulated. (Eric)

Anode return path equiv circuit4

32

Anode/HV return path schematic. (Eric)