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group_secar2.0 [2018/09/13 14:31] plastun |
group_secar2.0 [2018/09/13 16:19] plastun |
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-- by Alex, Nadeesha and Louis -- | -- by Alex, Nadeesha and Louis -- | ||
+ | |||
===== DAY1===== | ===== DAY1===== | ||
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{{ : | {{ : | ||
- | Reaction summary for < | + | Reaction summary for < |
The maximum γ energy is 8.481 MeV. The minimum γ energy is 7.249 MeV.\\ | The maximum γ energy is 8.481 MeV. The minimum γ energy is 7.249 MeV.\\ | ||
The maximum < | The maximum < | ||
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{{ : | {{ : | ||
+ | ---- | ||
===== DAY2 ===== | ===== DAY2 ===== | ||
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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.\\ | ||
+ | ---- | ||
===== DAY3===== | ===== DAY3===== | ||
==== Impact of Lenght Change of Quadrupole 2 ==== | ==== Impact of Lenght Change of Quadrupole 2 ==== | ||
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{{ : | {{ : | ||
+ | ---- | ||
===== DAY4===== | ===== DAY4===== | ||
==== Optics misalignments ==== | ==== Optics misalignments ==== | ||
+ | |||
+ | **Beam position. Longitudinal offset.** | ||
We populated " | We populated " | ||
- | '' | + | < |
- | SRXX:= XX*COS(PHI*3.14159/ | + | LOOP PHI 0.0 360 5; |
- | SRAX:= AX*SIN(PHI*3.14159/ | + | SRXX:= XX*COS(PHI*3.14159/ |
- | ENDLOOP;'' | + | SRAX:= AX*SIN(PHI*3.14159/ |
+ | ENDLOOP; | ||
+ | </ | ||
- | Number of rays in another planes | + | Rays in another planes |
- | + | < | |
- | '' | + | SRYY:= 0.0; |
SRAY:= 0.0; | SRAY:= 0.0; | ||
- | SRDE:= 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. \\ | ||
+ | |||
+ | **Beam size.**\\ | ||
+ | Change beam size with SCALING_FACTOR = (0.5..1.5): | ||
+ | < | ||
+ | SRXX:= XX*COS(PHI*3.14159/ | ||
+ | </ | ||
+ | Resolution reasonably drops with larger beam size. | ||
+ | {{ : | ||
+ | |||
+ | **Dipole 4 position. Transvers offset**\\ | ||
+ | {{: | ||
+ | |||
+ | **Dipole 4 position. Longitudinal offset**\\ | ||
+ | {{: | ||
+ | |||
+ | |Element|Variable |Range of ±5%| | ||
+ | |Beam|transverse|-5..+7 mm| | ||
+ | |Beam|longitudinal|-0.8..+0.5 mm| | ||
+ | |Beam|size|-x..+x| | ||
+ | |B4|transverse|-4..+1 mm| | ||
+ | |B4|longitudinal-10..+55 mm| | ||
+ | |||
+ | ==== Recoil tracking in SECAR ==== | ||
+ | |||
+ | **< | ||
+ | |||
+ | Beam is set to 132MeV < | ||
+ | < | ||
+ | RP 132.0 46*PARA(1) 14*PARA(2); | ||
+ | {Design acceptances, | ||
+ | XX: | ||
+ | AX: | ||
+ | YY: | ||
+ | AY: | ||
+ | DE: | ||
+ | </ | ||
+ | |||
+ | Recoil beam fits the SECAR very well. | ||
+ | {{ : | ||
+ | |||
+ | ** ±1 charge state **\\ | ||
+ | |||
+ | Added extra rays: | ||
+ | < | ||
+ | {Define special rays for different charge states} | ||
+ | SR 0 -AX 0 0 0 0.0 0 1/14 2; | ||
+ | SR 0 0 0 0 0 0.0 0 1/14 2; | ||
+ | SR 0 AX 0 0 0 0.0 0 1/14 2; | ||
+ | |||
+ | SR 0 -AX 0 0 0 0.0 0 -1/14 3; | ||
+ | SR 0 0 0 0 0 0.0 0 -1/14 3; | ||
+ | SR 0 AX 0 0 0 0.0 0 -1/14 3; | ||
+ | |||
+ | {Beam 45V14+} | ||
+ | SR 0 -AX 0 0 0 3/132 -1/46 0/14 5; | ||
+ | SR 0 0 0 0 0 3/132 -1/46 0/14 5; | ||
+ | SR 0 AX 0 0 0 3/132 -1/46 0/14 5; | ||
+ | </ | ||
+ | {{ : | ||
+ | ---- | ||
+ | THANK YOU FOR VISITING OUR PAGE | ||
- | Created loop for target position. Observed piece-wise curve for resolution vs target offset (see figure below) in case of 4th order calculation. If order reduced to the 1st, than curve is smooth, but maximum resolution is shifted. | ||
- | {{ : |