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--- group_secar2.0 [2018/09/11 16:47]
wagner
+++ group_secar2.0 [2018/09/11 16:50]
wagner
@@ Line 64: / Line 64: @@
 {{ :plot.png?400 |}}
+Fit result for parabola X<sub>max</sub><sup>2</sup> = σ<sub>11</sub> = a·K<sup>2</sup> - 2ab·K + ab<sup>2</sup> + c is:\\
 a = 0.000362572706 \\
 b = 0.0834414129893 \\
 c = 3.506973286e-07\\
-X<sub>max</sub><sup>2</sup> = σ<sub>11</sub> = a·K<sup>2</sup> - 2ab·K + ab<sup>2</sup> + c
 The consistency check for beam size calculation in Q7 shows: X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\
-Emittance = 3.045387898578198e-07  π m rad= 0.3 π mm mrad.\\
+Emittance calculated from fit parameter  = 3.045387898578198e-07  π m rad= 0.3 π mm mrad.\\
 Start beam emittance= XX * AX= 0.2 π mm mrad, so the emittance grows from the start to the focal point.\\
 This rmittance grow is possibly due to the optics aberrations. Input COSY file does a 4th-order-calculation. Also the measured points don't fit the parabola ideally, i.e. the optics is non-linear.\\

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018