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group_secar2.0 [2018/09/11 15:54] wagner |
group_secar2.0 [2018/09/11 16:24] wagner |
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- | Group SECAR2.0 | + | ====== |
- | **DAY1 | + | -by Alex, Nadeesha and Louis- |
- | **\\ | + | |
- | Reaction: < | + | ===== DAY1===== |
+ | ==== Getting started ===== | ||
+ | |||
+ | Choosen example reaction: < | ||
+ | ⇒important for < | ||
Beam: < | Beam: < | ||
{{ : | {{ : | ||
- | Matrix:\\ | + | ====Understanding COSY Matrix |
+ | Command: OV 1 1 0 ; {order 1, phase space dim 1 INCLUDING ENERGY, # of parameters 0}\\ | ||
+ | Output:\\ | ||
|1.0|0.0|0.0|0.0|-0.41| | |1.0|0.0|0.0|0.0|-0.41| | ||
|2.2|1.0|0.0|0.0|-0.35|\\ | |2.2|1.0|0.0|0.0|-0.35|\\ | ||
+ | Explanation: | ||
+ | |R< | ||
+ | |R< | ||
R< | R< | ||
R< | R< | ||
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R< | R< | ||
+ | ==== Reaction Kinematics Calculation==== | ||
{{ : | {{ : | ||
+ | |||
Reaction summary for < | Reaction summary for < | ||
The maximum γ energy is 8.481 MeV. The minimum γ energy is 7.249 MeV.\\ | The maximum γ energy is 8.481 MeV. The minimum γ energy is 7.249 MeV.\\ | ||
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c = 3.506973286e-07\\ | c = 3.506973286e-07\\ | ||
Double check for beam size calculation in Q7: X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\ | Double check for beam size calculation in Q7: X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\ | ||
- | Emittance = 3.045387898578198e-07 | + | Emittance = 3.045387898578198e-07 |
- | start beam emittance= XX * AX= 0.2 π mm mrad so the emittance grows from the start to the focal point\\ | + | Start beam emittance= XX * AX= 0.2 π mm mrad, so the emittance grows from the start to the focal point.\\ |
- | Emittance grows due to the optics aberrations. Input COSY file shows 4th-order-calculation. Also measured points don't fit the parabola ideally, i.e. optics is non-linear.\\ | + | This rmittance grow is possibly |