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group_secar2.0 [2018/09/12 15:43] wagner [Impact of Lenght Change in Quadrupole 2] |
group_secar2.0 [2018/09/13 14:53] plastun |
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===== DAY3===== | ===== DAY3===== | ||
- | ==== Impact of Lenght Change | + | ==== Impact of Lenght Change |
The effective length of Q2 was reduced by 3% to 0.291m with the drift lenghts before and after increased by 0.0045m.\\ | The effective length of Q2 was reduced by 3% to 0.291m with the drift lenghts before and after increased by 0.0045m.\\ | ||
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{{ : | {{ : | ||
+ | |||
+ | ===== DAY4===== | ||
+ | ==== Optics misalignments ==== | ||
+ | |||
+ | **Beam position. Longitudinal offset.** | ||
+ | |||
+ | We populated " | ||
+ | |||
+ | '' | ||
+ | SRXX:= XX*COS(PHI*3.14159/ | ||
+ | SRAX:= AX*SIN(PHI*3.14159/ | ||
+ | ENDLOOP;'' | ||
+ | |||
+ | Rays in another planes are on-axis: | ||
+ | |||
+ | '' | ||
+ | SRAY:= 0.0; | ||
+ | SRDE:= 0.0;'' | ||
+ | |||
+ | Created loop for target position. Observed piece-wise curve for resolution vs target offset (meters) (see figure below) in case of 4th order calculation. If order reduced to the 1st, than curve is smooth, but maximum resolution is shifted. | ||
+ | {{ : | ||
+ | The resolution drops by 5% at the offsets (-5 mm, +7 mm).\\ | ||
+ | |||
+ | **Beam position. Transverse offset.** | ||
+ | {{ : | ||
+ | The resolution drops by 5% at the beam offsets (-0.8 mm, +0.5 mm). The offset is of the beam half-size order. \\ | ||
+ | |||