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bam_group [2018/09/13 21:34] hamaker [DAY 1:] |
bam_group [2018/09/13 21:44] (current) hamaker [DAY 4:] |
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| The blue ray has the increase in energy while the red ray has the decrease. | The blue ray has the increase in energy while the red ray has the decrease. | ||
| - | **Remember to take the transpose of the transport matrix to extract matrix elements correctly.** | + | **Remember to take the transpose of the transport matrix |
| ===== DAY 2: ===== | ===== DAY 2: ===== | ||
| Line 73: | Line 73: | ||
| Change to: | Change to: | ||
| - | MQ 1.03*(LQ3+DLQ3) Q3*QF RQ3; | + | '' |
| - | MQ < | + | '' |
| Line 82: | Line 82: | ||
| Change drift before Q3 definition from | Change drift before Q3 definition from | ||
| - | DL DL6-0.5*DLQ3; | + | '' |
| to | to | ||
| - | DL DL6-0.5*DLQ3-0.03*(LQ3+DLQ3)/ | + | '' |
| Change drift after Q3 definition from | Change drift after Q3 definition from | ||
| - | DL DL7-0.5*DLQ3-0.5*DLQ4; | + | '' |
| to | to | ||
| - | DL DL7-0.5*DLQ3-0.5*DLQ4-.03*(LQ3+DLQ3)/ | + | '' |
| Line 103: | Line 103: | ||
| Improved method for changing effective length of Q3: | Improved method for changing effective length of Q3: | ||
| ------------------------------------------------------------- | ------------------------------------------------------------- | ||
| - | Line 545, we have definition DLQ3 := 0.353 - LQ3 | + | Line 545, we have definition |
| (This is the difference between measured effective field length and defined effective field length, LQ3) | (This is the difference between measured effective field length and defined effective field length, LQ3) | ||
| Line 109: | Line 109: | ||
| Now we just need to change the measured effective length by PMOD*0.353 where PMOD is a variable for % modification, | Now we just need to change the measured effective length by PMOD*0.353 where PMOD is a variable for % modification, | ||
| - | Definition of MQ already includes factor DLQ3: MQ LQ3+DLQ3 Q3*QF RQ3; | + | Definition of MQ already includes factor |
| - | as do the drifts before and after: DL DL6-0.5*DLQ3; | + | as do the drifts before and after:'' |
| ------------------------------------------------------------- | ------------------------------------------------------------- | ||
| - | Attempt to recover best mass resolution | + | Attempt to recover best mass resolution: |
| ------------------------------------------------------------- | ------------------------------------------------------------- | ||
| - | To do this we will try to fit the strength of Q3. Doing this calculation to 5th order, we are able to recover the initial mass resolution of 59 with a Q3 quad strength of .88. The original strength was .9, so the strength | + | To do this we will try to fit the strength of Q3. Doing this calculation to 5th order, we are able to recover the initial mass resolution of 59 with a Q3 quad strength of .88 which is a 2% decrease in the quad strength. |
| ------------------------------------------------------------- | ------------------------------------------------------------- | ||
| ===== DAY 4: ===== | ===== DAY 4: ===== | ||
| - | Today we are working on problem 8. We are using the command SA <DX> <DY> to change the beam position. SA <DX> <DY> offsets the optics axis x by DX and y by DY. To 5th order, changing the x offset by .5 mm leads to a 5% change in the mass resolution. Any amount of change of the y offset leads to no change in the mass resolution. This is pretty weird... | + | Today we are working on problem 8. We are using the command |
| - | We changed the beam size by changing the values of variables X and Y. By changing | + | We changed the beam size by changing the values of variables X and Y. Increasing |
| By adding 2 mm to the lengths of quad 3 and 4 and decreasing the drift lengths after them by 2 mm, we reach a 5% change in the mass resolution. | By adding 2 mm to the lengths of quad 3 and 4 and decreasing the drift lengths after them by 2 mm, we reach a 5% change in the mass resolution. | ||
| - | We can shift optical elements by placing the SA command before and after the element you are shifting. For instance, if you want to shift a quadrupole in the positive y-direction by 5 mm, you would use the following command: | + | We can shift optical elements |
| '' | '' | ||
| Line 135: | Line 135: | ||
| We used this command to shift quadrupole 3 up by 5 mm which changed the mass resolution by 5%. Shifting the quadrupole by 0.5 mm in the x-direction changes the mass resolution by 5%. | We used this command to shift quadrupole 3 up by 5 mm which changed the mass resolution by 5%. Shifting the quadrupole by 0.5 mm in the x-direction changes the mass resolution by 5%. | ||
| - | We can use the TA command to do rotations | + | We can use the TA command to rotate the quad about the x and y axes. This has the same syntax as SA. |
| - | Rotating about x-axis .05° changes the mass resolution by 5%. Rotating about y-axis .15° changes the mass resolution by 5%. | + | Rotating about the x-axis |
| To determine how much roll is allowed before changing the mass resolution by 5%, we use the RA command which takes one angle and rotates about the z-axis. An angle 0f 2.3° is allowed. | To determine how much roll is allowed before changing the mass resolution by 5%, we use the RA command which takes one angle and rotates about the z-axis. An angle 0f 2.3° is allowed. | ||
/srv/thewikis/JIOSS/data/attic/bam_group.1536888873.txt.gz · Last modified: 2018/09/13 21:34 by hamaker
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