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µSR

Chapters:

  1. Introduction
  2. The muon
  3. Muon production
  4. Spin polarization
  5. Detect the µ spin
  6. Implantation
  7. Paramagnetic species
  8. A special case: a muon with few nuclei
  9. Magnetic materials
  10. Relaxation functions
  11. Superconductors
  12. Mujpy
  13. Mulab
  14. Musite?
  15. More details

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MusrfitMapGlobal

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For this result (check: klog user to access afs; /usr/local/bin/musrfit is linked, other pitfalls in the notes)

  • start from single fit of template 158, 158.msr
FeSe(new),T=1.50K,WEP100G                                     
###############################################################
FITPARAMETER
#       No Name        Value     Step        Pos_Error   Boundaries
        1 alphaUD     0.9640    0.0011      none        
        2 AsyUD       0.22971   0.00092     none        
        3 PhaseUD     32.24     0.27        none        
        4 Field       100.643   0.027       none        
        5 sigma0158   0.1554    0.0030      none        0       none    ## remeber to add run number, 4 digits, to local variables
        6 alphaFB     0.9992    0.0018      none        
        7 AsyFB       0.2265    0.0013      none        
        8 PhaseFB     -57.73    0.39        none        

###############################################################
THEORY                                                              ## the two maps allow fitting both UD and FB summing their fcn in the single chisquare
asymmetry   map1
TFieldCos   map2  fun1       (phase frequency)
simpleGss      5          (rate)

###############################################################
FUNCTIONS
fun1 = par4 * gamma_mu                                              ## par is always field, used as omega

###############################################################
RUN d2020/tdc/deltat_tdc_gps_0158 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
ta-file-format)
fittype         2         (asymmetry fit)
alpha           1                                                        ## alpha for U-D is FITPARAMETER 1
map             2    3    0    0    0    0    0    0    0    0           ## map1 map2 0 0 0 ... for U-D  
forward         3                                                        ## U
backward        4                                                        ## D
background      20      500     20      500        # estimated bkg: 25.2669 / 19.1864 ## check that these are before prompt!
data            544     27272   545     27272                           ## fistgood lastgood
t0              533.9   535.1                                           ## check at start of run
fit             0       10                                              ## this works if it is resp larger and smaller that data lims
packing         1                                                       ## packing for fit (could have been much larger

RUN d2020/tdc/deltat_tdc_gps_0158 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
ta-file-format)
fittype         2         (asymmetry fit)
alpha           6                                                        ## alpha for F-B is FITPARAMETER 6
map             7    8    0    0    0    0    0    0    0    0           ## map1 map2 0 0 0 ... for F-B
forward         2                                                        ## F
backward        1                                                        ## B
background      20      500     20      500        # estimated bkg: 5.7119 / 2.1186 # the rest is like above
data            547     27272   545     27272   
t0              537.0   534.9   
fit             0       10     
packing         1

###############################################################
COMMANDS
MINIMIZE
#MINOS
SAVE

###############################################################
PLOT 2   (asymmetry plot)
runs     1   2   
range    -0   10   -0.29   0.29
view_packing 100
###############################################################
STATISTIC --- 2020-10-12 19:45:49
  chisq = 53239.0, NDF = 53447, chisq/NDF = 0.996108


  • msr2data generates this 158+global.msr (here shown only for 158-159, can be extended to 174, commandline @@msr2data )
FeSe(new),T=1.50K,WEP100G                                     
###############################################################
FITPARAMETER
#      No Name        Value     Step        Pos_Error   Boundaries

# Common parameters for all runs

        1 alphaUD     0.96253   0.00076     none        
        2 AsyUD       0.23056   0.00065     none        
        3 PhaseUD     32.11     0.19        none        
        4 Field       100.654   0.019       none        
        5 alphaFB     0.9979    0.0012      none        
        6 AsyFB       0.22505   0.00093     none        
        7 PhaseFB     -57.76    0.28        none        

# Specific parameters for run 158

        8 sigma0158   0.1558    0.0028      none        0       none    

# Specific parameters for run 159

        9 sigma0159   0.1495    0.0028      none        0       none    

###############################################################
THEORY
asymmetry   map1
TFieldCos   map2  fun1       (phase frequency)
simpleGss   map3          (rate)

###############################################################
FUNCTIONS
fun1 = par4 * gamma_mu

###############################################################

# RUN blocks for run 158

RUN d2020/tdc/deltat_tdc_gps_0158 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
fittype         2         (asymmetry fit)
alpha           1
map             2    3    8    0    0    0    0    0    0    0
forward         3 
backward        4 
background      20      500     20      500        # estimated bkg: 25.2669 / 19.1864
data            544     27272   545     27272   
t0              533.9   535.1   
fit             0       10     
packing         1

RUN d2020/tdc/deltat_tdc_gps_0158 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
fittype         2         (asymmetry fit)
alpha           5
map             6    7    8    0    0    0    0    0    0    0
forward         2 
backward        1 
background      20      500     20      500        # estimated bkg: 5.7119 / 2.1186
data            547     27272   545     27272   
t0              537.0   534.9   
fit             0       10     
packing         1

# RUN blocks for run 159

RUN d2020/tdc/deltat_tdc_gps_0159 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
fittype         2         (asymmetry fit)
alpha           1
map             2    3    9    0    0    0    0    0    0    0
forward         3 
backward        4 
background      20      500     20      500        # estimated bkg: 25.0890 / 19.1483
data            544     27272   545     27272   
t0              533.9   535.1   
fit             0       10     
packing         1

RUN d2020/tdc/deltat_tdc_gps_0159 PIM3 PSI PSI-BIN   (name beamline institute data-file-format)
fittype         2         (asymmetry fit)
alpha           5
map             6    7    9    0    0    0    0    0    0    0
forward         2 
backward        1 
background      20      500     20      500        # estimated bkg: 5.4936 / 2.0593
data            547     27272   545     27272   
t0              537.0   534.9   
fit             0       10     
packing         1

###############################################################
COMMANDS
MINIMIZE
SAVE

###############################################################
PLOT 2   (asymmetry plot)
runs     1   2   
range    -0   10   -0.29   0.29
view_packing 100

###############################################################
STATISTIC --- 2020-10-13 10:42:14
  chisq = 107082.8, NDF = 106901, chisq/NDF = 1.001701


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Page last modified on October 13, 2020, at 10:47 AM