JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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group_1-a-α_thefirst [2018/09/10 16:47]
yandow 		group_1-a-α_thefirst [2018/09/13 16:52] (current)
yandow
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 7. Our reaction has been performed before at much lower energies. (~1MeV total) 7. Our reaction has been performed before at much lower energies. (~1MeV total)
 +
 +-> 9/12
 +
 +8. We finding three bibliographical information on the reaction(P-31(p,γ)S-32) our propose to study.
 +1. (http://www.publish.csiro.au/ph/pdf/PH750155) Total Yield Measurements
 +2. (http://www.publish.csiro.au/ph/pdf/PH750383) Accurate Branching Ratio Measurements
 +3. (https://ac.els-cdn.com/0375947469903352/1-s2.0-0375947469903352-main.pdf?_tid=6aa70e34-a7e3-49d4-8a85-e12712e5caa3&acdnat=1536684968_ccf8a340de1e4652e100ac01d110ea64) MECHANISM OF THE REACTION IN THE GIANT DIPOLE RESONANCE REGION
 +
 +9. Xmax(g)=σ11(1+σ12L/σ11-Lg)+(εL)^2/σ22
 +We need to know the values of σ11, σ12, and σ22 to find the Emittance value.
 +Changing Qurupole Strangth(g value) for make three equation.
 +and using three eqaution find three unknown parameter(σ11, σ12, and σ22).
 +
 +10. Extract the distance L for the center of quad Q7 to the focal plan FP2
 +(0.17005(center of quad)+0.5+2.365+0.5+0.26+0.28+0.26+1.75=6.08505)
 +
 +11. In emittance script.fox plus 'WRITE 6 'VAMX :' VMAX(RAY(1)) ;' and extract VMAX Value.
 +
 +{{:캡처.png?400|}}  {{:캡처2.png?400|}}
 +
 +12. Using σ11(1,K)=aK^2-2abK+ab^2+c
 + Calculate σ11=2.7*10^-6 σ12=1.72*10^-6 σ22=0.14*10^-6 ε=0.794*10^-6
 +
 +////// 9-13-18 //////
 +
 +13. Original mass resolving power of SECAR before sections 3 and 4 is 742.3138003312769 when the order is set to 1. If resolving power is on the order of 1000, then you need to comment out section 3 and 4 in the fox file.
 +
 +14. We increased the effective length of Q3 by 3% and also changing DL7 and DL8, so that the center of Q3 stays in the same place. This decreases the mass resolution to 602.6032654725383
 +
 +15. We fit the strength of Q3 using the objective function OBJ:=1/ABS(Mass Resolution) + ABS(ME(1,2)/(XX)) . From this we found that we could recover the original resolving power by reducing the strength of Q3 by 3%. The ray paths are shown below.
 +
 +{{:optimized_secar_x.png?400|}}
 +
 +
 +16. We are now changing a variety of system parameters to see how much things can be changed before our mass resolution is changed by at least 5%.
 +
 +BEAM SPOT:
 +X width: <.714286mm >.789414mm (~.04mm tolerance)
 +Y width: <.714286mm >.789414mm (~.04mm tolerance)
 +
 +BEAM POSITION:
 +X tolerance: -2.346mm/+2.148mm
 +Y tolerance: -0.01166mmmm/+0.01168mm
 +
 +QUADRUPOLE ALIGNMENT CHANGES:
 +Q3: 
 +Z Position change by +/- 1mm (~1mm tolerance)
 +X Position change by +/- .75mm
 +Y Position change by +/- 8.45mm
 +
 +Roll: 
 +
 +
 +
 +
 +17. Ate Ice-Cream
  
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