lamp_mac/D17/
d17_polcorr.pro
top d17_polcorr
result = d17_polcorr(win, phi=phi, F1=F1, F2=F2, p1=p1, p2=p2)
LAMP function to take up to four workspaces, one for each flipper state, and to correct for the polarizing inefficiencies. The corrections are based on the equations in: Wildes, Rev. Sci. Instrum., 70 (1999) 4241 ARW 31.03.04 NECESSARY INPUT: win=input workspace. This can be a 4 rows x N columns matrix, where N is the number of 2 theta values. The order of the rows *must* be (from the top) I00, I01, I10, I11 It is assumed that each column gives the values of I measured at *the same* position in theta 'mload' will automatically create an array of the right dimensions You can create such a matrix from four 1d datasets using the aw_four1d2one2d function OR, it can be a 2 rows x N columns matrix for those measurements without an analyser (i.e. for 'asymmetry') The order of the rows *must* be (from the top) I0, I1 SEMI-NECESSARY INPUT: All this input is in the form of a two-element array, the first number is the value of the parameter the second number is its error The program aw_polcalc returns the values in the right format Depending on the type of measurement, you must include some combination of the following: p1=inefficiency of the polarizer (between 0 and 1) p2=inefficiency of the analyzer (between 0 and 1) F1=inefficiency of the first flipper (between 0 and 1) F2=inefficiency of the second flipper (between 0 and 1) phi=p1+p2-2*p1*p2 (between 0 and 1) NOTE: If you enter p1 and/or p2, the program will IGNORE phi! OUTPUT: The workspace will be either a 4 rows x N columns matrix, the order of the rows will be (from the top) SIGMA(++),SIGMA(+-),SIGMA(-+),SIGMA(--) Or the workspace will be a 2 rows x N columns matrix, the order of the rows will be (from the top) SIGMA(+),SIGMA(-) e.g. type at LAMP interface w6=d17_polcorr(w5,F1=[0.007,0.0008],F2=[0.005,0.0008],p1=[0.05,0.002],p2=[0.011,0.002]) (good for ferro and ferrimagnets) w6=d17_polcorr(w5,F1=[0.007,0.0008],F2=[0.005,0.0008],phi=[0.05,0.002]) (good for antiferro and paramagnets) w6=d17_polcorr(w5,F1=[0.007,0.0008],p1=[0.05,0.002]) (good for spin asymmetry) CALLS TO: d17_errmsg last modified: ARW 17.12.10
Parameters
- win
Keywords
- phi
- F1
- F2
- p1
- p2
File attributes
Modification date: | Tue Oct 1 14:43:02 2013 |
Lines: | 159 |