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--- group_secar2.0 [2018/09/13 15:08]
plastun
+++ group_secar2.0 [2018/09/13 16:19]
plastun
@@ Line 3: / Line 3: @@
 -- by Alex, Nadeesha and Louis --
-----
 ===== DAY1=====
 ==== Getting started =====
@@ Line 101: / Line 101: @@
 We populated "X-θ" phase-space with rays distributed on the border of ellipse by the loop:
-''LOOP PHI 0.0 360 5;\\
+<code>
-SRXX:= XX*COS(PHI*3.14159/180);\\
+LOOP PHI 0.0 360 5;
-SRAX:= AX*SIN(PHI*3.14159/180);\\
+SRXX:= XX*COS(PHI*3.14159/180);
-ENDLOOP;''
+SRAX:= AX*SIN(PHI*3.14159/180);
+ENDLOOP;
+</code>
 Rays in another planes are on-axis:
+<code>
-''SRYY:= 0.0;
+SRYY:= 0.0;
 SRAY:= 0.0;
-SRDE:= 0.0;''
+SRDE:= 0.0;
+</code>
 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.
@@ Line 116: / Line 119: @@
 The resolution drops by 5% at the offsets (-5 mm, +7 mm).\\
-**Beam position. Transverse offset.**
+**Beam position. Transverse offset.**\\
 {{ :transv.png?450 |}}
 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):
+<code>
+SRXX:= XX*COS(PHI*3.14159/180)*SCALING_FACTOR
+</code>
+Resolution reasonably drops with larger beam size.
+{{ :beam_size.png?400 |}}
+**Dipole 4 position. Transvers offset**\\
+{{:transvers_shift_b4.jpg?450|}}\\
+**Dipole 4 position. Longitudinal offset**\\
+{{:longitudinal_shift_b4.jpg?450|}}\\
+|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 ====
@@ Line 125: / Line 149: @@
 Beam is set to 132MeV <sup>46</sup>Cr<sup>14+</sup>\\
-''RP 132.0 46*PARA(1) 14*PARA(2) ;''\\
+<code>
-''{Design acceptances, depends on kinematics of a specific reaction!}\\
+RP 132.0 46*PARA(1) 14*PARA(2);
-XX:=0.0005;\\
+{Design acceptances, depends on kinematics of a specific reaction!}
-AX:=0.01726;\\
+XX:=0.0005;
-YY:=0.0005;\\
+AX:=0.01726;
-AY:=0.01726;\\
+YY:=0.0005;
-DE:=0.0047;''
+AY:=0.01726;
-{{ :46cr_recoil_in_secar.png?400 |}}
+DE:=0.0047;
+</code>
+Recoil beam fits the SECAR very well.
+{{ :46cr_recoil_in_secar.png?300 |}}
+** ±1 charge state **\\
+Added extra rays:
+<code>
+{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;
+</code>
+{{ :different_beams.png?400 |}}
 ----
+THANK YOU FOR VISITING OUR PAGE

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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