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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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  • ## (Oct 2020 notes) Fit of 3-4 only, over temperature scan RUNS to be generated by msr2data, with
    • global alpha Phase and BG component, second term in THEORY (AsyBG FieldBG sigmaBG) (it is a Gaussian mu)
    • local AsySC_XXXX FieldSC_XXXX sigmaSC_XXXX for SC component, first termi in theory (also a Gaussian mu)
    • note the global frequency fun2 and the local frequency fun1 mapped to local FieldSC (*gamma_mu)
    • note that map is used exclusively for local parameters
  • ## musr2data will:
    • generate as many triplets of local AsySC FieldSC sigmaSC pars with appended _XXXX run number as runs in the scan
    • generate replica RUN blocks for each run in the scan
    • shift accordingly the map indices
MgTi438, Fe2As2Ca4(Mg,Ti)3O8, 07-2011                         
###############################################################
FITPARAMETER
#       No Name        Value     Step        Pos_Error   Boundaries
        1 alpha       0.94887   0.00094     none        
        2 Phase       16.75     0.92        none        
        3 FieldBG     703.5 0.01        none        
        4 sigmaBG    0.08 0.00        none        
        5 AsyBG       0.0235    0.0031      none        
        6 AsySC_1584       0.1546    0.0024      none        
        7 FieldSC_1584     701.18    0.14        none        
        8 sigmaSC_1584     0.5398    0.0093      none        0       none    

###############################################################
THEORY
asymmetry   map1
TFieldCos      2  fun1       (phase frequency)
simpleGss   map3          (rate)
+
asymmetry      5
TFieldCos      2  fun2       (phase frequency)
simpleGss      4          (rate)
###############################################################
FUNCTIONS
fun1 = map2 * gamma_mu
fun2 = par3 * gamma_mu
###############################################################
RUN d2011/tdc/deltat_tdc_gps_1584 PIM3 PSI PSI-BIN   (name beamline institute da
ta-file-format)
fittype         2         (asymmetry fit)
alpha           1
map             6    7    8    0    0    0    0    0    0    0
forward         3       
backward        4       
background      7       291     5       297     
data            304     10219   312     10231             ## this is firstgood lastgood
t0              298     306     
fit             0       10                      ## this is a cut to 10 mus (if less data are available, data prevails)
packing         10

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

###############################################################
FOURIER
units            Gauss   # units either 'Gauss', 'MHz', or 'Mc/s'
fourier_power    12
apodization      MEDIUM  # NONE, WEAK, MEDIUM, STRONG
plot             POWER   # REAL, IMAG, REAL_AND_IMAG, POWER, PHASE
phase            8
#range_for_phase_correction 50.0 70.0
range            0    6000

###############################################################
PLOT 2   (asymmetry plot)
runs     1   
range    -0   10   -0.29   0.29
view_packing 5
###############################################################
STATISTIC --- 2011-07-12 22:58:00
  chisq = 9912.14005, NDF = 9907, chisq/NDF = 1.00051883

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Page last modified on October 12, 2020, at 08:51 AM