Skip to content

Commit

Permalink
Refs #7149 changed to unordered list
Browse files Browse the repository at this point in the history
  • Loading branch information
jmborr committed May 28, 2013
1 parent 248e968 commit ca17175
Showing 1 changed file with 6 additions and 6 deletions.
12 changes: 6 additions & 6 deletions Code/Mantid/Framework/Algorithms/src/ModeratorTzeroLinear.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -19,17 +19,17 @@ Below is the example XML code included in BASIS beamline parameters file.
</pre>
The recorded TOF: <math>TOF = t_0 + t_i + t_f</math>, with
#<math>t_0</math>: emission time from the moderator
#<math>t_i</math>: time from moderator to sample
#<math>t_f</math>: time from sample to detector
*<math>t_0</math>: emission time from the moderator
*<math>t_i</math>: time from moderator to sample
*<math>t_f</math>: time from sample to detector
This algorithm will replace TOF with <math>TOF' = TOF-t_0 = t_i + t_f</math>
For an indirect geometry instrument, <math>\lambda_i</math> is not known but the final energy, <math>E_f</math>,
selected by the analyzers is known. For this geometry:
#<math>t_f = L_f/v_f</math>, with <math>L_f</math>: distance from sample to detector, <math>v_f</math>: final velocity derived from <math>E_f</math>
#<math>t_i = L_i/v_i</math>, with <math>L_i</math>: distance from moderator to sample, <math>v_i</math>: initial velocity unknown
#<math>t_0 = a'/v_i+b'</math>, with a' and b' constants derived from the aforementioned heuristic formula <math>a' = a \cdot 3.956 \cdot 10^{-3}</math> with [a']=meter,
*<math>t_f = L_f/v_f</math>, with <math>L_f</math>: distance from sample to detector, <math>v_f</math>: final velocity derived from <math>E_f</math>
*<math>t_i = L_i/v_i</math>, with <math>L_i</math>: distance from moderator to sample, <math>v_i</math>: initial velocity unknown
*<math>t_0 = a'/v_i+b'</math>, with a' and b' constants derived from the aforementioned heuristic formula <math>a' = a \cdot 3.956 \cdot 10^{-3}</math> with [a']=meter,
and <math>b' = b</math> with [b']=microsec
Putting all together: <math>TOF' = \frac{L_i}{L_i+a'} \cdot (TOF-t_f-b') + t_f</math>, with [TOF']=microsec
Expand Down

0 comments on commit ca17175

Please sign in to comment.