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group_secar2.0 [2018/09/11 14:41] plastun |
group_secar2.0 [2018/09/11 16:11] wagner |
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Group SECAR2.0 | Group SECAR2.0 | ||
- | Reaction: < | + | -by Alex, Nadeesha and Louis- |
+ | |||
+ | **DAY1**\\ | ||
+ | **Getting started**\\ | ||
+ | Example reaction: < | ||
+ | ⇒important for < | ||
Beam: < | Beam: < | ||
{{ : | {{ : | ||
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{{ : | {{ : | ||
- | Q7 strenght variation:\\ | + | **DAY2**\\ |
- | |Q7 [T]|profile [mm]| | + | |
- | |0.3401|29.0|\\ | + | |
- | |-0.3401|5.6|\\ | + | |
**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. | ||
{{ : | {{ : | ||
- | B Xmax ap Brho L K | + | **Q7 strenght variation: |
- | 0.02 2.91E-03 0.13 0.8 0.34 0.065384615 | + | |B [T] |Xmax[m] |ap [m] |Brho* [Tm] |L [m] |K| |
- | 0.01 2.27E-03 0.13 0.8 0.34 0.032692308 | + | |0.02 |2.91E-03 |0.13 |0.8 |0.34 |0.065384615| |
- | 0 1.62E-03 0.13 0.8 0.34 0 | + | |0.01 |2.27E-03 |0.13 |0.8 |0.34 |0.032692308| |
- | -0.01 1.20E-03 0.13 0.8 0.34 -0.032692308 | + | |0 |1.62E-03 |0.13 |0.8 |0.34 |0| |
- | -0.02 9.08E-04 0.13 0.8 0.34 -0.065384615 | + | |-0.01 |1.20E-03 |0.13 |0.8 |0.34 |-0.032692308| |
- | -0.03 6.23E-04 0.13 0.8 0.34 -0.098076923 | + | |-0.02 |9.08E-04 |0.13 |0.8 |0.34 |-0.065384615| |
- | -0.04 9.54E-04 0.13 0.8 0.34 -0.130769231 | + | |-0.03 |6.23E-04 |0.13 |0.8 |0.34 |-0.098076923| |
- | -0.05 1.60E-03 0.13 0.8 0.34 -0.163461538 | + | |-0.04 |9.54E-04 |0.13 |0.8 |0.34 |-0.130769231| |
- | -0.06 2.26E-03 0.13 0.8 0.34 -0.196153846 | + | |-0.05 |1.60E-03 |0.13 |0.8 |0.34 |-0.163461538| |
+ | |-0.06 |2.26E-03 |0.13 |0.8 |0.34 |-0.196153846|\\ | ||
+ | |||
+ | *Brho the magnetic rigidity was extracted from COSY by comand CONS(CHIM)\\ | ||
+ | |||
+ | **Fit of the data to parabola** | ||
+ | {{ : | ||
+ | |||
+ | a = 0.000362572706 \\ | ||
+ | b = 0.0834414129893 \\ | ||
+ | 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.\\ | ||
+ | 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.\\ | ||
+ | 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.\\ | ||