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--- group_secar2.0 [2018/09/13 15:06]
plastun
+++ group_secar2.0 [2018/09/13 16:05]
plastun
@@ Line 2: / Line 2: @@
 -- by Alex, Nadeesha and Louis --
 ===== DAY1=====
@@ Line 39: / Line 40: @@
 {{ :dipole46cr13.png?400 |}}
+----
 ===== DAY2 =====
@@ Line 77: / Line 79: @@
 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=====
 ==== Impact of Lenght Change of Quadrupole 2 ====
@@ Line 90: / Line 93: @@
 {{ :fitted.png?400 |}}
+----
 ===== DAY4=====
 ==== Optics misalignments ====
@@ Line 97: / 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 112: / 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. \\
+**Dipole 4 position. Transvers offset**\\
+{{:transvers_shift_b4.jpg?450|}}\\
+**Dipole 4 position. Longitudinal offset**\\
+{{:longitudinal_shift_b4.jpg?450|}}\\
 ==== Recoil tracking in SECAR ====
@@ Line 121: / Line 134: @@
 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;
+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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