Difference between revisions of "Emittance/TWISS parameter extraction"
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[[File:ISU_3.jpeg|200px|thumb|left|X beam size squared vs K1*L]] | [[File:ISU_3.jpeg|200px|thumb|left|X beam size squared vs K1*L]] | ||
[[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 | | ||
| + | |Y quad scan 0| 3.7e-6 | 0.41 | 2.3 | | ||
| + | |- | ||
Revision as of 20:08, 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 | |-