sudden jumps in the absolute energy scale and their origin
DESCRIPTION
Sudden jumps in the absolute energy scale and their origin. FF Mn-K Pos Quadrant 0. ± 5 eV. Effect of the particle background. FF Mn-K Pos Quadrant 0. + 41.5 eV. ± 5 eV. 2005 Dec 20 – 2006 Jan 01. FF AL-K Pos Quadrant 0. ± 5 eV. + 10.5 eV. - PowerPoint PPT PresentationTRANSCRIPT
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Sudden jumps in the Sudden jumps in the
absolute energy scale and absolute energy scale and
their origintheir origin
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
FF Mn-K Pos Quadrant 0
± 5 eV
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Effect of the particle Effect of the particle
backgroundbackground
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
FF Mn-K Pos Quadrant 0
± 5 eV
2005 Dec 20 – 2006 Jan 01
+ 41.5 eV
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
FF AL-K Pos Quadrant 0
± 5 eV
2005 Dec 20 – 2006 Jan 01
+ 10.5 eV
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Al-K: 1.486 keV, +10.5 eV +0.707%
Mn-K: 5.894 keV, +41.5 eV +0.704% Change in the gain,
not in the offset
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Energy resolution somewhat improved during high background
reduced charge loss noise reduced charge loss
increased trap saturation
Energy shift occurs also for first singles
precursors ‘invisible’
precursors below lower threshold or in preceding frame(s)
low background
high background
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
rev 711, high background
Al-K
Mn-K
Al-K
Mn-K
The CTI during low and high background
rev 709, low background
decreased CTI during high
background (Mn-K)
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
low
back
gro
un
d
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
hig
h
back
gro
un
d
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
During episodes of high particle background the CTI is reduced.
This is most likely caused by saturation of traps due to precursors.
The charge of the precursors is below the 20 adu threshold and thus not available.
The usual CTI correction cannot be used.
But there may be a correlation with the background flux which can be used for the
correction..
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Effect of the quadrant box Effect of the quadrant box
temperaturetemperature
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Gain/temperature correlation: earlier investigations
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα & Al-K position and quadrant box temperature
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Quadrant box temperatures
(yellow circles: no FF mode)
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 1 & 2
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 3 & 4
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 5 & 6
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 7 & 8
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 9 & 10
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. temperature: CCD 11 & 12
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. Al-K position
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Deviations of the Al-K and Mn-Kα positions
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα position vs. Al-K position
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα positions (after gain and CTI correction)
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mn-Kα positions after temperature (and dCTI/dt) correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
“CCD offsets”
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Doy 2000
Quadrant box temperatures
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Standard correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
with 1 adu / 2000 d drop
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
with 1 adu / 2000 d drop
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Mean quadrant box temperature [C]
(F1576..F1876)
Mn
-Kα p
osi
tion
[a
du
]
(in q
uadra
nt
0, aft
er
1 a
du /
20
00
d d
rop)
slope: +
0.43 adu / C
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
standard correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
after temperature.. correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
standard correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
after temperature.. correction
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca
Multiply all energies with a factor F:
F = ( 1 - A(t) - B(Tq) ) C
A = 4.24 * 10-7 (t-t0)/[d]
B = 3.65 * 10-4 Tq/[oC]
C = 1.0057
t0 : 2000-Jan-01
Tq: mean of T(F1576)..T(F1876)
K. Dennerl, 2006 October 26EPIC pn: Jumps in the energy scaleEPIC Calibration Meeting, Mallorca