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--- group_secar2.0 [2018/09/10 16:12]
plastun
+++ group_secar2.0 [2018/09/11 15:37]
wagner
@@ Line 22: / Line 22: @@
 Assume normalized emittance 0.6 π mm mrad provided from ReA3 at 3.0 MeV/u. \\
 Geometric emittance is 0.6/0.08 = 7.5 π mm mrad.\\
-Spot size on the target is ±0.5 mm (full width). Than anglular spread is ±15 mrad.\\
+Spot size on the target is ±0.5 mm (full width). Then anglular spread is ±15 mrad.\\
 Adding the effect from the target of 0.13 deg = ±2.26 mrad we get ±17.26 mrad of angular spread:\\
 SB 0.0005 0.01726 0 0.0005 0.01726 0 0 0.0047 0 0 0 ;\\
 {{ :dipole46cr13.png?400 |}}
-[[Test|Test]]
+**Emittance measurement**\\
+Distance between Q7 center and focal plane is 6.085 m.
+{{ :emittance.png?400 |}}
+Q7 strenght variation:\\
+|B [T]	|Xmax[m]	|ap [m]	|Brho [Tm]	|L [m]	|K|
+|0.02	|2.91E-03	|0.13	|0.8	|0.34	|0.065384615|
+|0.01	|2.27E-03	|0.13	|0.8	|0.34	|0.032692308|
+|0	|1.62E-03	|0.13	|0.8	|0.34	|0|
+|-0.01	|1.20E-03	|0.13	|0.8	|0.34	|-0.032692308|
+|-0.02	|9.08E-04	|0.13	|0.8	|0.34	|-0.065384615|
+|-0.03	|6.23E-04	|0.13	|0.8	|0.34	|-0.098076923|
+|-0.04	|9.54E-04	|0.13	|0.8	|0.34	|-0.130769231|
+|-0.05	|1.60E-03	|0.13	|0.8	|0.34	|-0.163461538|
+|-0.06	|2.26E-03	|0.13	|0.8	|0.34	|-0.196153846|\\
+**Fit of the data to parabola**
+{{ :plot.png?400 |}}
+a = 0.000362572706 \\
+b = 0.0834414129893 \\
+c = 3.506973286e-07\\
+double check for beam size calculation in Q7: X_calculated = X_cosy_read_out = 3.55
+Emittance = 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

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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