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--- group_10 [2018/09/13 15:27]
dombos
+++ group_10 [2018/09/13 16:07]
dombos
@@ Line 88: / Line 88: @@
   * ''WRITE 6 'Fit Q2: ' Q2 'OBJECTIVE: ' OBJ '1/OBJ: ' 1/OBJ;''
   * ''ENDFIT 1E-5 1000 1 OBJ ;''
+After converging, the fitted value of Q2 is 0.1778619910379541. The original value of Q2 was 0.1828815622086947 (from section ''{Field for the standard particle ... scaled by QF to adapt field to right p/q}'').
+This is a (0.1828815622086947 - 0.1778619910379541) / (0.1828815622086947) * 100 = 2.74% decrease. This almost compensates for the 3% increase in the effective field length.
+**Problem 8**
+The mass resolutions of ''stgeorge.fox'' without any modifications are given at the beginning of the previous problem.
+In order to have a 5% decrease in the mass resolutions, the final resolutions must be
+(60.123-x)/(60.123) = 0.05 -> x = 57.11685%, and (59.262-y)/(59.262) = 0.05 -> y = 56.2989%.
+The beam position (offsetting the optical axis) can be changed with the ''SA'' command.

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018