[ Identification | Description | Input parameters | Links ]

`Guide_tapering`

Component-
**Site:** -
**Author:**Uwe Filges -
**Origin:**PSI -
**Date:**22/10/2003

Models a rectangular guide tube centered on the Z axis. The entrance lies in the X-Y plane. The guide may be tapered. The component includes a feature to read in self-defined functions for guide tapering. Under the parameter 'option' the KEYWORD 'file=' offers the possibility to read in parameters from an ASC-file. The file structure is shown below in the example. It is important to know that the first 3 lines will be interpreted as comments. Afterwards the dimension of each guide segment must be defined. The length of each segment is constant l(i)=l/segments . The number of segments is defined through the number of lines minus the first 3 lines taken from the Input-File. The guide can be made curved both horizontally and vertically (not shown in 3d view), and m-coating, when set negative, is varied in 1/width. Example Input-File: c Guide_tapering.comp c i = 0 - 199 segments c h1(i) h2(i) w1(i) w2(i) 0.120000 0.119850 0.020000 0.020000 0.119850 0.119700 0.020000 0.020000 0.119700 0.119550 0.020000 0.020000 0.119550 0.119400 0.020000 0.020000 0.119400 0.119250 0.020000 0.020000 0.119250 0.119100 0.020000 0.020000 ... Example1: Guide_tapering(w1=0.1, h1=0.18, linw=0.1, loutw=0.1, linh=0.1, louth=0.1, l=1.5, option="elliptical", R0=0.99, Qcx=0.021, Qcy=0.021, alphax=6.07, alphay=6.07, W=0.003, mx=1, my=1, segno=800) Example2: Guide_tapering(w1=0, h1=0, linw=0, loutw=0, linh=0, louth=0, l=1.5, option="file=ownfunction.txt", R0=0.99, Qcx=0.021, Qcy=0.021, alphax=6.07, alphay=6.07, W=0.003, mx=1, my=1) %BUGS This component does not work with gravitation on. Use component Guide_gravity then.

Name | Unit | Description | Default | |

option | str | define the input function for the curve of the guide walls options are: "elliptical" - define elliptical function of guide walls "parabolical" - define parabolical function of guide walls "straight" - define a straight elements guide"file=[filename]" - read in ASC-file with arbitrary definition for the curve of the guide walls | 0 | |

w1 | m | Width at the guide entry | 0 | |

h1 | m | Height at the guide entry | 0 | |

l | m | length of guide | ||

linw | m | distance from 1st focal point to real guide entry - left and right horizontal mirrors | 0 | |

loutw | m | distance from real guide exit to 2nd focal point - left and right horizontal mirrors | 0 | |

linh | m | distance from 1st focal point to real guide entry - top and bottom vertical mirrors | 0 | |

louth | m | distance from real guide exit to 2nd focal point - top and bottom vertical mirrors | 0 | |

R0 | 1 | Low-angle reflectivity | 0.99 | |

Qcx | AA-1 | Critical scattering vector for left and right vertical mirrors in each channel | 0.021 | |

Qcy | AA-1 | Critical scattering vector for top and bottom mirrors | 0.021 | |

alphax | AA | Slope of reflectivity for left and right vertical mirrors in each channel | 6.07 | |

alphay | AA | Slope of reflectivity for top and bottom mirrors | 6.07 | |

W | AA-1 | Width of supermirror cut-off for all mirrors | 0.003 | |

mx | 1 | m-value of material for left and right vertical mirrors in each channel. Zero means completely absorbing. Negative value will adapt coating as e.g. m=mx*w1/w | 1 | |

my | 1 | m-value of material for top and bottom mirrors. Zero means completely absorbing. Negative value will adapt coating as e.g. m=my*h1/h | 1 | |

segno | 1 | number of segments (z-axis) for cutting the tube | 800 | |

curvature | m | guide horizontal radius of curvature. Zero means straight. | 0 | |

curvature_v | m | guide vertical radius of curvature. Zero means straight. | 0 |

AT ( | , | , | ) RELATIVE | |||
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ROTATED ( | , | , | ) RELATIVE |

- Source code for
`Guide_tapering.comp`

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[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36