JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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group_secar2.0 [2018/09/11 15:14]
wagner 		group_secar2.0 [2018/09/11 16:20]
wagner
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-Group SECAR2.0+====== Group SECAR2.0 ======
  
-Reaction: <sup>45</sup>V(p,γ)<sup>46</sup>Cr\\+-by Alex, Nadeesha and Louis- 
 + 
 +===== DAY1===== 
 +==== Getting started ===== 
 + 
 +Choosen example reaction: <sup>45</sup>V(p,γ)<sup>46</sup>Cr\\ 
 +⇒important for <sup>44</sup>Ti production rate in core collapse Supernova ([[https://www.sciencedirect.com/science/article/pii/S0375947403008704|Horoi et al. Nucl.Phys.A 718, (2003)]])\\
 Beam: <sup>45</sup>V<sup>13+</sup> of 135 MeV (1% enegry spread)\\ Beam: <sup>45</sup>V<sup>13+</sup> of 135 MeV (1% enegry spread)\\
 {{ :dipole.png?300 |}}\\ {{ :dipole.png?300 |}}\\
-Matrix:\\+====Understanding COSY Matrix output==== 
 +Command: OV 1 1 0 ; {order 1, phase space dim 1 INCLUDING ENERGY, # of parameters 0}\\ 
 +Output:\\
 |1.0|0.0|0.0|0.0|-0.41| |1.0|0.0|0.0|0.0|-0.41|
 |2.2|1.0|0.0|0.0|-0.35|\\ |2.2|1.0|0.0|0.0|-0.35|\\
 +Explaination:
 +|R<sub>11</sub>|R<sub>12</sub>|0.0|0.0|R<sub>15</sub>|
 +|R<sub>21</sub>|R<sub>22</sub>|0.0|0.0|R<sub>25</sub>|\\
 R<sub>11</sub> = 1.0 is "Magnification", i.e. no magnification provided with the dipole.\\ R<sub>11</sub> = 1.0 is "Magnification", i.e. no magnification provided with the dipole.\\
 R<sub>12</sub> = 0.0 is "Focusing", i.e. no focusing is provided by the dipole.\\ R<sub>12</sub> = 0.0 is "Focusing", i.e. no focusing is provided by the dipole.\\
Line 28: Line 39:
 {{ :dipole46cr13.png?400 |}} {{ :dipole46cr13.png?400 |}}
  
 +**DAY2**\\
 **Emittance measurement**\\ **Emittance measurement**\\
 Distance between Q7 center and focal plane is 6.085 m. Distance between Q7 center and focal plane is 6.085 m.
 {{ :emittance.png?400 |}} {{ :emittance.png?400 |}}
  
-Q7 strenght variation:\\ +**Q7 strenght variation:**\\ 
-|B [T] |Xmax[m] |ap [m] |Brho |L [m] |K|+|B [T] |Xmax[m] |ap [m] |Brho* [Tm] |L [m] |K|
 |0.02 |2.91E-03 |0.13 |0.8 |0.34 |0.065384615| |0.02 |2.91E-03 |0.13 |0.8 |0.34 |0.065384615|
 |0.01 |2.27E-03 |0.13 |0.8 |0.34 |0.032692308| |0.01 |2.27E-03 |0.13 |0.8 |0.34 |0.032692308|
Line 44: Line 55:
 |-0.05 |1.60E-03 |0.13 |0.8 |0.34 |-0.163461538| |-0.05 |1.60E-03 |0.13 |0.8 |0.34 |-0.163461538|
 |-0.06 |2.26E-03 |0.13 |0.8 |0.34 |-0.196153846|\\ |-0.06 |2.26E-03 |0.13 |0.8 |0.34 |-0.196153846|\\
 +
 +*Brho the magnetic rigidity was extracted from COSY by comand CONS(CHIM)\\
 +
 +**Fit of the data to parabola**
 +{{ :plot.png?400 |}}
 +
 +a = 0.000362572706 \\
 +b = 0.0834414129893 \\
 +c = 3.506973286e-07\\
 +Double check for beam size calculation in Q7: X_calculated = 3.13mm, X_cosy_read_out = 3.16mm at the Q7 exit.\\
 +Emittance = 3.045387898578198e-07  π m rad= 0.3 π mm mrad.\\
 +Start beam emittance= XX * AX= 0.2 π mm mrad, so the emittance grows from the start to the focal point.\\
 +This rmittance grow is possibly due to the optics aberrations. Input COSY file does a 4th-order-calculation. Also the measured points don't fit the parabola ideally, i.e. optics is non-linear.\\
 +
  
/srv/thewikis/JIOSS/data/pages/group_secar2.0.txt · Last modified: 2018/09/13 16:49 by plastun

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