Questions:
1) Is setting FSE to some value the same as setting both FSE_DIPOLE and FSE_QUADRUPOLE to that value?
2) If FSE, FSE_DIPOLE, and FSE_QUADRUPOLE are all set to different values what is the result?
Question about FSE, FSE_DIPOLE, FSE_QUADRUPOLE
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michael_borland
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Re: Question about FSE, FSE_DIPOLE, FSE_QUADRUPOLE
The FSE factor is applied to all fields, including dipole, quadrupole, and higher multipoles.
FSE_DIPOLE is the same, but it does not affect the quadrupole or sextupole terms.
FSE_QUADRUPOLE affects only the quadrupole terms (normal and skew).
So if you compare setting (FSE=x,FSE_DIPOLE=FSE_QUADRUPOLE=0) to setting (FSE=0, FSE_DIPOLE=FSE_QUADRUPOLE=x), you'll find that the agree in linear order only. The reason is that FSE affects the sextupole and higher terms, whereas FSE_DIPOLE affects octupole and higher terms (in addition to the dipole).
--Michael
FSE_DIPOLE is the same, but it does not affect the quadrupole or sextupole terms.
FSE_QUADRUPOLE affects only the quadrupole terms (normal and skew).
So if you compare setting (FSE=x,FSE_DIPOLE=FSE_QUADRUPOLE=0) to setting (FSE=0, FSE_DIPOLE=FSE_QUADRUPOLE=x), you'll find that the agree in linear order only. The reason is that FSE affects the sextupole and higher terms, whereas FSE_DIPOLE affects octupole and higher terms (in addition to the dipole).
--Michael