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version 1.2, 2003/04/10 16:50:07
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version 1.3, 2003/07/07 20:30:53
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| \author{M. K. Jones} | \author{M. K. Jones} |
| \category{beamline} % Subject area of this document | \category{beamline} % Subject area of this document |
| %\maintainer{Name of person maintaining document} % Optional | %\maintainer{Name of person maintaining document} % Optional |
| \date{April 10, 2003} % Can use \today as the argument |
\date{July 7, 2003} % Can use \today as the argument |
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| \begin{document} | \begin{document} |
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| \item Type: make\_harp\_file {\it directory\_name} {\it run\_number} | \item Type: make\_harp\_file {\it directory\_name} {\it run\_number} |
| \item Type: use cernlib/2000 | \item Type: use cernlib/2000 |
| \item Type: paw++ | \item Type: paw++ |
| \item In paw++ Executive window type: exec plot\_harp harpname=IHA3H00\_{\it runnum} |
\item Depending if beam was unrastered or rastered. If the beam was unrastered and |
| \item A plot of the raw harp scan is shown. Click gates around each peak. |
one wants to fit with a Gaussian then add {\it fit=yes} when |
| \item Then the x1 plot appears. Then click at the lower left, center and upper left of the peak |
execute plot\_harp.kumac in next step. If the beam was rastered then |
| \item Then the y plot appears. Then click at the lower left, center and upper left of the peak |
execute with {\it fit=no}. |
| \item Then the x2 plot appears. Then click at the lower left, center and upper left of the peak |
\item In paw++ Executive window type: exec plot\_harp harpname=IHA3H00\_{\it runnum} fit={\it yes or no} |
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\item A plot of the raw harp scan is shown. Click with left mouse to make gates around each peak. |
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Click the right mouse to quit. |
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The first peak is the x1 wire, the second is the y wire and the third is the x2 wire. |
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The program has offsets for each wire ( for spring 2003 these were determined |
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by comparison to the BPMs). For each of the following plots, the offset for that wire is |
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subtracted from the raw data and for the X1 and X2 the sign is reversed to agree the |
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BPM sign conventions. |
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\item Then the x1 plot appears. If not doing a fit the |
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left click at the lower left, center and upper left of the peak (click with right |
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mouse to quit). The kumac will return |
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the difference between the first and last position and the center position. For a |
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fit make a click in the flat region below the peak, at the top peak ( the y position |
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is used as the starting height) and in the |
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flat region above the peak . |
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The fit is a constant background plus a Gaussian. |
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Unfortunately fitting with PAW can sometimes have problems, and you just have do it |
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again. If you get a negative number for sigma you can just take the absolute |
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value since PAW uses the square and is insensitive to the sign. All units are mm. |
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\item Then the y plot appears. Do as for x1 plot. |
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\item Then the x2 plot appears. Do as for x1 plot. |
| \end{enumerate} | \end{enumerate} |
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| \end{document} | \end{document} |
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| % Revision history: | % Revision history: |
| % $Log$ | % $Log$ |
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% Revision 1.3 2003/07/07 20:30:53 saw |
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% (jones) Add detail for paw++ analysis |
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% |
| % Revision 1.2 2003/04/10 16:50:07 saw | % Revision 1.2 2003/04/10 16:50:07 saw |
| % (jones) Add procedure for harps near target | % (jones) Add procedure for harps near target |
| % | % |
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