Response Functions for
the Compton Photon Analysis

Rich Holmes

HAPPEX Meeting

7 Apr 2006

Old response function

Old response function

Old response function

New response function - exp(poly)

Some deficiencies

Better behavior via fake data

More deficiencies

Strips 1-4

Strips 5-8

Strips 9-12

Strip 13

Moment diffs – (function - data)

Moment diffs – (function - data)

GainCalib 0.992623 +/- 0.000267

Chi2FitSpectrum 647.080322 / 141

CptThres 112.682045 (Raw ADC channels)

CptEdge 571.084839 (Raw ADC channels)

RawAsymNoThres 1.684391 +/- 0.016970 (%)

RawAsymScaler 1.670228 +/- 0.016616 (%)

SoftThres(g6) 78.554698 (MeV)

B/S(g6) 0.017919 +/- 0.000040

<Abkg>(g6) 0.417363 +/- 0.208032 (%)

<Aexp>(g6) 2.710982 +/- 0.020822 (%)

<AtheoL>(g6) 2.898359 (%)

<AtheoR>(g6) 2.944747 (%)

PePg_L(g6) 91.647480 +/- 1.066270 (%)

PePg_R(g6) 93.606172 +/- 0.956914 (%)

<PePg(g6)> 92.732388 +/- 0.712174 (%)

GainCalib 1.002975 +/- 0.000266

Chi2FitSpectrum 370.240234 / 141

CptThres 112.682045 (Raw ADC channels)

CptEdge 571.084839 (Raw ADC channels)

RawAsymNoThres 1.684391 +/- 0.016970 (%)

RawAsymScaler 1.670228 +/- 0.016616 (%)

SoftThres(g6) 77.755243 (MeV)

B/S(g6) 0.017919 +/- 0.000040

<Abkg>(g6) 0.417363 +/- 0.208032 (%)

<Aexp>(g6) 2.710982 +/- 0.020822 (%)

<AtheoL>(g6) 3.108500 (%)

<AtheoR>(g6) 3.149634 (%)

PePg_L(g6) 85.451939 +/- 0.994188 (%)

PePg_R(g6) 87.517000 +/- 0.894666 (%)

<PePg(g6)> 86.592975 +/- 0.665034 (%)

Old Function

New Function

Hybrid functions

Hybrid functions

Where are we?

We've solved the biggest mysteries!

We have tools in hand for study of response function systematics

We can vary moments and see their effects

We can make exp(polynomial) functions without the pathologies of our first attempts

We can make hybrid functions, exp(polynomial) in the data region and reasonable extrapolation (using old function) elsewhere

Barring disasters we should know our systematics very soon.

Richard Holmes

2006-04-06T23:10:55