Differences

This shows you the differences between two versions of the page.

--- group_1-a-α_thefirst [2018/09/11 15:45]
lim
+++ group_1-a-α_thefirst [2018/09/13 16:52] (current)
yandow
@@ Line 41: / Line 41: @@
 . 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

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018