Schematic view of the MCP assembly. The assembly involves a front grid, three MCP plates in the -stack configuration, a 354.375° resistive anode for position sensing, a start grid and a center anode for time-of-flight measurements, and resistors and capacitors for ac grounding and acquisition of signals.
Schematic illustration of the pattern of the resistive anode, the center anode, and the ground. This pattern is formed on an alumina substrate which is installed behind the MCP plates.
Photograph of the MCP assembly. Seven resistors and four capacitors are emplaced on the two circuit boards with a diameter of . The two circuit boards are piled up beyond the anode plate.
Equivalent circuit model of the MCP detection system focusing the paths of the timing signals. All of the stray inductances are omitted for simplicity, and only the capacitances are set in the original circuit.
Trajectories of an electron emitted from the output side of the MCP plates. The radius of the charge cloud is determined by the electron motion . and denote the distances from the output side of the MCP plates to the start grid and from the start grid and the resistive anode, respectively. The bias voltages of and are determined by and . The electron starts out from the output side of the MCP plates perpendicularly to the electric field with initial energy of . Just after being scattered by the start grid perpendicularly to the electric field, the electron has energy of . denotes the transmittance of the start grid.
Shapes of the start and stop signals obtained by the strat grid and the center anode of the MCP detection system. Panel A shows the result of , , , , and . Panel B shows the result of , , , , and . Panel C shows the result of , , , , and . Panel D shows the result of , , , , and .
Histogram of charge division ratio measured in the test experiment. The calibrated angle corresponds to the charge division ratio.
Results of the test experiments measuring the radii of the charge cloud when reaching the resistive anode. The calculated radii are also listed.
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