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--- group_1-a-α_thefirst [2018/09/10 16:24]
yandow
+++ group_1-a-α_thefirst [2018/09/13 16:52]
yandow
@@ Line 5: / Line 5: @@
 . The Energy of the incident phosphorus is 31MeV
-. We wrote our code, foolishly putting Isaac in charge. Code can be found here (add link later)
+. We wrote our code, foolishly putting Isaac in charge. Our (commented) code can be found here (add link later)
+COSY output shown below
+{{:bob45plot.png?400|}}
-. Final x and y positions were determined to be $x_f=.018$ $x_f=.009$ at dE/E=.05
+. Final x and y positions were determined to be x_f=.018 y_f=.009 at dE/E=.05
-. Our energy spread is ~3.1%, exactly SECAR's 3.1% limit
+. We used http://skisickness.com/2010/04/relativistic-kinematics-calculator/ to determine the recoil energy and angular distribution
+{{:energyvsangle.png?400|}}
+. Our energy spread is ~3.1%, the same as SECAR's 3.1% limit
+. Our opening angle is 7.0 mrad which is under the 25 mrad max of SECAR
+. Our reaction has been performed before at much lower energies. (~1MeV total)
+-> 9/12
+. We finding three bibliographical information on the reaction(P-31(p,γ)S-32) our propose to study.
+. (http://www.publish.csiro.au/ph/pdf/PH750155) Total Yield Measurements
+. (http://www.publish.csiro.au/ph/pdf/PH750383) Accurate Branching Ratio Measurements
+. (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
+. 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).
+. 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)
+. In emittance script.fox plus 'WRITE 6 'VAMX :' VMAX(RAY(1)) ;' and extract VMAX Value.
+{{:캡처.png?400|}}  {{:캡처2.png?400|}}
+. 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 //////
+. 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.
+. 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
+. 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|}}
+. 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:
+. Ate Ice-Cream
-. Our openning angle  is 7.0 mrad which is under the 25 mrad max

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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