V3 News
- background shape is evaluated in run 162 WITHOUT common mode correction. See Masks, Background subtraction for detail.
- pfv3r1 - is upgraded PSAS-147
- S/N statistical significance is improved by increasing number of pixels. See Hit/Peak Finders.
Data processing
exp=cxif5315:run=169
nda_data = det.raw(evt) if nda_data is not None : nda = np.array(nda_data, dtype=np.float32, copy=True) nda -= nda_peds nda = subtract_bkgd(nda, nda_bkgd, mask=nda_smask, winds=winds_bkgd, pbits=0) nda *= nda_smask
Peak finder parameters
alg_arc = PyAlgos(windows=winds_arc, mask=mask_arc, pbits=2) alg_arc.set_peak_selection_pars(npix_min=0, npix_max=1e6, amax_thr=0, atot_thr=0, son_min=6) #alg_arc.set_peak_selection_pars(npix_min=0, npix_max=1e6, amax_thr=0, atot_thr=500, son_min=6) # for v2r1 alg_equ = ... the same # in the event loop #peaks_arc = alg_arc.peak_finder_v2r1(nda, thr=30, r0=7, dr=2) #peaks_arc = alg_arc.peak_finder_v3r1(nda, rank=5, r0=7, dr=2) peaks_arc = alg_arc.peak_finder_v4r1(nda, thr_low=10, thr_high=150, rank=5, r0=7, dr=2)
Results
ARC
pre-selection for histograms
def procPeakDataArc(pk) : """ Process peak for ARC region; accumulate peak statistics in histogram arrays. """ #=================== sp.lst_arc_atot.append(pk.atot) if pk.atot<1500 : return #=================== sp.lst_arc_amax.append(pk.amax) sp.lst_arc_npix.append(pk.npix) sp.lst_arc_r .append(pk.r) sp.lst_arc_phi .append(pk.phi) ...
plots for pfv2/3/4r1
EQU
pre-selection for histograms
def procPeakDataEqu(pk) : """ Process peak for EQU region; accumulate peak data """ # discard small radius peaks from all histograms #=================== sp.lst_equ_atot.append(pk.atot) if pk.atot<1500 : return if pk.r<100 : return #=================== sp.lst_equ_amax.append(pk.amax) sp.lst_equ_npix.append(pk.npix) sp.lst_equ_r .append(pk.r) sp.lst_equ_phi .append(pk.phi) ...
plots for pfv2/3/4r1
Fit results
ARC
EQU
References
- Masks, Background subtraction
- PSAS-147 pfv3r1 - is upgraded
- Hit/Peak Finders - S/N statistical significance is improved by increasing number of pixels
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