This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
group_secar2.0 [2018/09/11 17:15] wagner |
group_secar2.0 [2018/09/11 17:23] wagner [Emittance Measurement] |
||
---|---|---|---|
Line 73: | Line 73: | ||
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 by 3 orders | + | 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. | |
- | [This emittance grow is possibly due to the optics aberrations. | + | |