AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
EDI_PSA
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Entry time:
Sun May 19 04:30:26 2024
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> Given very poor fit using line + power law + line, changes were made to the fitting algorithm. > - Starting paramters optimised for new typical wave shape > - Reverted to 3 lines, since signals are faster > - Subtracted wave minimum from all wave points to have a more realistic chi2 estimate > - Discarded all waves where 2nd half of signal > 1st half of signal. Should correspond to pick-up / noise > > Fit: 3 lines > Free parameters: 2x boundary points between lines > Algorithm: Nelder-Mead, 20 iterations. > > Attach 1: Wave amplitudes > Attach 2: Rise times > No major differences vs. power law method, but note candidate electron peak in rise time spectrum is now sharper. > > Attach 3-9: Waveforms with H~90 and increasing rise times. > Note fit shown are via Solver's GRG, not NM. > Fits in waves 1-4 give same result for GRG and NM. > > Fit in wave 5: NM-> H72 t102 vs. GRG-> H80 t25 > Fit in wave 6: NM-> H96 t128 vs. GRG-> H90 t23 > GRG risetimes are more realistic. This appears to be due to very short baseline pre-rise. > Will increase in next run. > > Fit in wave 7 is rare pile-up event. Code cannot yet cope. Bad fit.
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