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group_secar2.0 [2018/09/11 15:18] plastun |
group_secar2.0 [2018/09/11 15:41] plastun |
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Group SECAR2.0 | Group SECAR2.0 | ||
+ | **DAY1 | ||
+ | **\\ | ||
Reaction: < | Reaction: < | ||
Beam: < | Beam: < | ||
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{{ : | {{ : | ||
+ | **DAY2**\\ | ||
**Emittance measurement**\\ | **Emittance measurement**\\ | ||
Distance between Q7 center and focal plane is 6.085 m. | Distance between Q7 center and focal plane is 6.085 m. | ||
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b = 0.0834414129893 \\ | b = 0.0834414129893 \\ | ||
c = 3.506973286e-07\\ | c = 3.506973286e-07\\ | ||
- | Emittance = 3.045387898578198e-07 | + | double check for beam size calculation in Q7: X_calculated = X_cosy_read_out = 3.55\\ |
+ | 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\\ | ||
+ | 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.\\ | ||
+ |