Difference between revisions of "Emittance/TWISS parameter extraction"
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[[File:ISU_4.jpeg|200px|thumb|center|CEBAF graphical emittance tool with X data and results shown]] | [[File:ISU_4.jpeg|200px|thumb|center|CEBAF graphical emittance tool with X data and results shown]] | ||
| − | {| | + | {| |
| − | | | + | | || emittance|| beta ||alpha |
|- | |- | ||
| − | | | | + | | || (m-rad) || (m) || |
| − | |||
|- | |- | ||
| − | |X quad scan 1| 1.3e-6 | 0.35 | 2.0 | + | |X quad scan 1 || 1.3e-6 || 0.35 || 2.0 |
| − | |||
|- | |- | ||
| − | | | + | |Y quad scan 0 || 3.7e-6 || 0.41 || 2.3 |
| + | |} | ||
Revision as of 20:13, 22 October 2010
Using the perl/PDL script, beam sizes for Y (quad scan 0) and X (quad scan 1) were measured. These beam sizes were put into a "sdds" file so the nominal CEBAF emittance/TWISS tool could be used to plot and fit the data.
Two fits are performed a simple Least Squares Fit and one based on MINUIT. The LSF is also used to seed the MINUIT fit.
Y plot and the GUI with results for the first quad scan.
X plot and the GUI with results for the second quad scan.
| emittance | beta | alpha | |
| (m-rad) | (m) | ||
| X quad scan 1 | 1.3e-6 | 0.35 | 2.0 |
| Y quad scan 0 | 3.7e-6 | 0.41 | 2.3 |