determination_of_angles_and_momentum

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

Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||

determination_of_angles_and_momentum [2013/10/18 14:36] pereira |
determination_of_angles_and_momentum [2022/06/09 15:08] pereira [Calculation of the inverse map] |
||
---|---|---|---|

Line 3: | Line 3: | ||

===== Ion-optic coordinates in the S800 ===== | ===== Ion-optic coordinates in the S800 ===== | ||

- | The optical coordinates used in the S800 are described in relation to a central trajectory passing through the center of the S800 magnets, and with the reference momentum given by //((Note that since the S800 bending dipoles are oriented vertically, the coordinate //x// corresponds to the vertical direction, while //y// refers to the horizontal direction)) The dispersive and non-dispersive angles //a// and //b// are referred with respect to the //z// axis in the // | + | The optical coordinates used in the S800 are described in relation to a central trajectory passing through the center of the S800 magnets, and with the reference momentum given by //.) The dispersive and non-dispersive angles //a// and //b// are referred with respect to the //z// axis in the // |

===== Reconstruction method ===== | ===== Reconstruction method ===== | ||

- | With the exception of the [[Magnets#Recontruction 1)) uses the ion optics code COSY Infinity ((Ref)) to calculate the transfer matrix //S// from the target to the focal plane, including aberrations up to 5<S800 [[SpecTcl]] analysis software provides all necessary functions and interfaces to perform these calculations. | + | With the exception of the [[Magnets#M. Berz, K. Joh, J. A. Nolen, B. M. Sherrill, and A. F. Zeller, Phys. Rev. C 47, 537 (1993))) uses the ion optics code [[http://COSY Infinity]] to calculate the transfer matrix //S// from the target to the focal plane, including aberrations up to 5<S800 SpecTcl|S800 SpecTcl]] analysis software provides all necessary functions and interfaces to perform these calculations. |

===== Calculation of the inverse map ===== | ===== Calculation of the inverse map ===== | ||

- | Since the energy coordinate //d// is one of the quantities deduced from the inverse map, the beam position x<to be zero. This assumption implies that the final resolution is obtained by folding the finite size of the beam spot in that direction with the size obtained from the reconstruction,[[Modes of Operation#://maps.nscl.msu.edu/~s800maps/]] from the currents of the S800 dipoles and quadrupole doublet, magnetic rigidity, and the particle (A,Z) are necessary. The process takes about 20 seconds. | + | Link to Mapserver: [[https://maps.frib.msu.edu/] |

determination_of_angles_and_momentum.txt · Last modified: 2022/06/09 15:08 by pereira