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group_secar2.0 [2018/09/11 16:37] wagner |
group_secar2.0 [2018/09/11 16:40] wagner |
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=== Quadrupole strenght variations for emittance measurment === | === Quadrupole strenght variations for emittance measurment === | ||
- | |B [T] |Xmax[m] |ap [m] |Bρ* [Tm] |L< | + | |B< |
|0.02 |2.91E-03 |0.13 |0.8 |0.34 |0.065384615| | |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| | |0.01 |2.27E-03 |0.13 |0.8 |0.34 |0.032692308| | ||
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*Bρ the magnetic rigidity was extracted from COSY by comand CONS(CHIM)\\ | *Bρ the magnetic rigidity was extracted from COSY by comand CONS(CHIM)\\ | ||
- | **Fit of the data to parabola** | + | === Fit of the data to parabola |
{{ : | {{ : | ||
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b = 0.0834414129893 \\ | b = 0.0834414129893 \\ | ||
c = 3.506973286e-07\\ | c = 3.506973286e-07\\ | ||
- | Double | + | The consistency |
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.\\ | ||
- | 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. optics is non-linear.\\ | + | 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.\\ |