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AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
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AIDA |
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Message ID: 840
Entry time: Thu Jun 13 05:49:37 2019
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Author: |
CA |
Subject: |
Further tests of calibration on Alpha data |
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Alpha data used: /May19/{R1,R2,R7,R8,R9,R11} (c. 380 hr.)
Absolute calibration calculated with relative calibrated data
Data then resorted with absolute and relative gains applied
Attachment 1 -> Ey vs Ex plot for all detectors, with slope Ey=Ex show in red. Some non-linearity present, but to first order looks good
Attachment 2 -> Alpha peaks pre- absolute calibration in DSSD0
Ex in blue, Ey in red
To determine absolute calibration coefficients, assigned leading edge of higher energy peak an energy of 7.4 MeV (Uranium decay series)
Divide this by the observed channel number (in keV) to get the absolute gain coefficients in keV/ch for Ex and Ey in each detector.
(Note, data already offset corrected, pulser walkthrough)
Values typically ~0.72 keV/ch
Multiply appropriately by relative gains obtained from gainMatch.cpp to get final gain coefficients.
Attachments 3 - 6 -> DSSD0 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachments 7 - 10 -> DSSD1 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachments 11 - 14 -> DSSD2 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachments 15 - 18 -> DSSD3 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachments 19 - 22 -> DSSD4 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachments 23 - 26 -> DSSD5 -> Ex - Ey
-> Ey vs Ex
-> Ex - Ey vs x strip
-> Ex - Ey vs y strip
Attachment 27 -> Table comparing sigma and peak centroids of Ex - Ey plots for each DSSD
Calculated using simple gaussian fit
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