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group_secar2.0
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group_secar2.0 [2018/09/11 17:23] wagner [Emittance Measurement] |
group_secar2.0 [2018/09/11 17:23] wagner [Emittance Measurement] |
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| The consistency check for beam size calculation in Q7 shows:\\ | The consistency check for beam size calculation in Q7 shows:\\ | ||
| X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\ | X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\ | ||
| - | Emittance calculated from fit parameters ε= √(ac) / L< | + | Emittance calculated from fit parameters ε= √(ac) / L< |
| - | 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 emittance grow is possibly due to the optics aberrations. That is because the 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.\\ | This emittance grow is possibly due to the optics aberrations. That is because the 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.\\ | ||
/srv/thewikis/JIOSS/data/pages/group_secar2.0.txt · Last modified: 2018/09/13 16:49 by plastun
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