Time-of-Flight Cheat Sheet

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  • WBS 1.5.2.3.1

Tof.png

  • number of layers: 2
    • horizontal and vertical orientation
  • if no special modules, would be 42 counters per layer
  • special modules take up 4 standard module spaces per layer
    • two standard spaces: half-width modules
    • two standard spaces: half-length modules
  • dimensions (centimeters)
    • standard: 2.54 x 6.00 x 252.00
    • half-width: 2.54 x 3.00 x 252.00
    • half-length: 2.54 x 6.00 x 120
  • count per layer
    • standard modules: 38
    • half-width modules: 4
    • half-length modules: 4
  • totals (both layers)
    • standard modules: 76
    • half-width modules: 8
    • half-length modules: 8
    • sum of all modules: 92
  • PMT's
    • all modules have two PMT's except half-length modules which have one
    • count is 2×(92-8) + 8 = 176
  • high rate counters
    • inner two standard counters on both sides, both layers = 8
    • all of the half-width counters = 8
    • all of the half-length counters = 8
    • PMT count for these = 2×(8 + 8) + 8 = 40
    • Standard PMT count would be 176 - 40 = 136