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--- group_secar2.0 [2018/09/13 16:01]
wagner [Optics misalignments]
+++ group_secar2.0 [2018/09/13 16:49] (current)
plastun
@@ Line 12: / Line 12: @@
 {{ :dipole.png?300 |}}\\
 ====Understanding COSY Matrix output====
-Command: OV 1 1 0 ; {order 1, phase space dim 1 INCLUDING ENERGY, # of parameters 0}\\
+Command:
+<code>OV 1 1 0 ; {order 1, phase space dim 1 INCLUDING ENERGY, # of parameters 0}</code>\\
 Output:\\
 |1.0|0.0|0.0|0.0|-0.41|
@@ Line 36: / Line 37: @@
 With the spot size on the target, designed to be ±0.5 mm (1σ), the anglular spread then is ±15 mrad.\\
 Adding the calculated spread from the reaction with the target of 0.13 deg = ±2.26 mrad we get ±17.26 mrad of angular spread.\\
-⇒COSY beam input: SB 0.0005 **0.01726** 0 0.0005 **0.01726** 0 0 0.0047 0 0 0 ;\\
+⇒COSY beam input:
+<code>SB 0.0005 **0.01726** 0 0.0005 **0.01726** 0 0 0.0047 0 0 0 ;</code>\\
 Output for this beam passing the dipole:
 {{ :dipole46cr13.png?400 |}}
@@ Line 114: / Line 116: @@
 SRDE:= 0.0;
 </code>
+The rays now look like this (not all the rays are displayed):
+{{ :rays.png?400 |}}
 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 122: / Line 126: @@
 {{ :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|}}\\
+{{ :transvers_shift_b4.jpg?450 |}}\\
 **Dipole 4 position. Longitudinal offset**\\
-{{:longitudinal_shift_b4.jpg?450|}}\\
+{{ :longitudinal_shift_b4.jpg?450 |}}\\
+**Dipole 4 position. Pitch**\\
+{{ :pitch_b4.jpg?400 |}}
+|Element|Variable |Range of ±5%|
+|Beam|transverse|-5..+7 mm|
+|Beam|longitudinal|-0.8..+0.5 mm|
+|Beam|size|-6%..+6%|
+|B4|transverse|-4..+1 mm|
+|B4|longitudinal|-10..+55 mm|
+|B4|pitch|-0.11..0.024 rad|
 ==== Recoil tracking in SECAR ====
@@ Line 147: / Line 170: @@
 {{ :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 |}}
+One can see how Wien filter cleans the recoils from the projectile beam at FP2.
 ----
-THANK YOU FOR VISITING OUR PAGE
+======       THANK YOU FOR VISITING OUR PAGE ======

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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