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Re: LYCCA ToF scintillators [message #19425 is a reply to message #19424] Fri, 12 August 2016 17:20 Go to previous messageGo to previous message
Michael Reese is currently offline  Michael Reese
Messages: 9
Registered: August 2016
occasional visitor
From: *gsi.de
Hi,

You need to create a pattern artificially. One possible way to do this is to draw a rectangular gate around the projected TPC-position, i.e. the "true" position, and make a gated ToF x:y plot with the condition that the "true" position is inside that gate. You'll see the distorted shape of whatever gate you have drawn.

Reminder of how to create such a rectangular gate in the config file (I didn't test that piece of code... there might be typos inside):
processor ToF_Start/TPC/gate UTILS.ConditionWindow2D
  x  <-  Frs/S4tracking.xs[5]
  y  <-  Frs/S4tracking.ys[5]
  display x:y | xy_window
end

processor ToF_Start/distored UTILS.PairWithCondition
  first  <- Lycca/ToFStart/Membrane.x
  second <- Lycca/ToFStart/Membrane.y
  condition <- ToF_Start/TPC/gate.inside
  display tested_first:tested_second 
end


If you want to have multiple gates, you could do something like this for 6 gates:
for $i in [0:5]
  processor ToF_Start/TPC/gate_$i UTILS.ConditionWindow2D
    x  <-  Frs/S4tracking.xs[5]
    y  <-  Frs/S4tracking.ys[5]
    display x:y | xy_window
  end
end

processor ToF_Start/distored UTILS.PairWithCondition
  first  <- Lycca/ToFStart/Membrane.x
  second <- Lycca/ToFStart/Membrane.y
  for $i in [0:5]
    condition <- ToF_Start/TPC/gate_$i.inside
  end
  display tested_first:tested_second 
end


Then you could draw gates in the shape of horizontal lines, three gates in the shape of vertical lines, and together they'll make a grid-like shape.

[Updated on: Fri, 12 August 2016 17:24]

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