XIS2 Calibration Status at Osaka U. 2004/03/16
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XIS2 Calibration Status at Osaka U.
2004/03/16
• Overview and current status of calibration in the soft X-ray region
• Energy-Pulse Height relation• Energy-Resolution relation• Quantum Efficiency• Line Profile
K. Torii (Osaka U.), XIS2 team
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Calibration method at Osaka U.
• We use a (calibrated) proportional counter as an absolute reference counter
• Calibrate XIS-EU (Seg. C) against the reference proportional counter
• Calibrate XIS-FM against XIS-EU (Seg. C)
Proportional counter
XIS-EU (Seg. C)
XIS-FM
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Calibration of EU
PD PCXIS-EU
Dispersed X-ray from spectrometer
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Calibration of FM
PD Fe55XIS-FM
Dispersed X-ray from spectrometer
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The datasets (2003/12-2004/3)
• EU : 8s × 14000 fr. (2003/12/12-30, 2004/2/17-19)• FM S0: 8s × 5262 fr. (2004/2/26-27, 2004/3/8-10)• FM S1: 8s × 9225 fr. (2004/3/3-6)• FM S2: 8s × 11930 fr. (2004/1/6-14, 2/7-11)• FM S3: 8s × 12810 fr. (2004/1/26-2/6)• FM S1, S2, S3 are complete, some additional data have t
o be taken for S0 and EU • EU:125-126eV, FMS2:127-129eV, FMS3:128-130eV• EU:2.1-2.4e-, FMS2:1.9-2.5e-, FMS3:2.2-2.5e- (Normal, grade 0)
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• PH=a ・ E + b• 1/a=3.720 eV/ch• b=1.38 ch
Energy-PH relation (FM S2, Segment C)
Si-K edge
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• Qualitatively similar results are obtained for all the sensors.
S0, Seg.A, Grade0 S1, Seg.C, Grade0
Energy-PH relation (S0-A, S1-C)
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Energy-PH Relation (FM S3-A)
• Fe55 で決めたゲインと~ 0.1% で一致• Qualitatively similar results are obtained for
grade 0 and 02346.
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Energy-Resolution (FM S2, Segment C)
• FWHM = sqrt (f02 + wf ・ E)
• f0 =15.2eV, wf= 0.45
Si-K edge
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Energy-Resolution (FM S3, Segment A)
• Qualitatively similar results are obtained for all the sensors.
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Q.E.: Input flux is variable …
+15%
C-K
O-K
Se-L (1.38 keV)W-M (1.77 keV)
Si edge
Al edge
Au edge
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Ratio of 2004/2003 EU data
Se L-α(1.38 keV)
W-M (1.77 keV)
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The dispersed spectra for Seg. C, Grade 02346
Se-L
C-K O-K
EU1
S3(×4)
S2(×16)
S1(×256)S0(×1024)
EU2(×64)
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Uncorrected relative Q.E. (Seg. C, Grade 02346)
S3S2EU2S1S0
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EXAFS and XANES at Oxygen K edge• FMS2, Segment 2, Grade 02346
EXAFS, XANES
Carbon K
Oxygen K
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Line profile (low energy tail) Oxygen-K (0.525 keV), H.V. = 1 and 5kV
• The effect of applied high voltage (5 kV) is almost negligible.• Tail component is significantly smaller than that for XIS 1.
1 kV5 kV
Pulse Height
Counts
XIS1 (H.Katayama master thesis)
XIS2-S2
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Summary• Cal. Data were obtained with Fe55 and spectrom
eter (~0.2-3 keV).• E-PH, E-Resolution relations are as expected.• Low energy tail component is smaller than that f
or XIS1 sensors.• We find that X-ray flux from the generator is var
iable on long timescale. This has to be taken into account before calculating QE.
• BPSG layer thickness does not seem to be significantly thinner for FM sensors than for EU (preliminary).
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Line profile (low energy tail)
Pulse Height
• Tail component is significantly smaller than that for XIS 1.
Counts
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Dispersed spectra (Q.E.)
EU(1)
EU(2)
S0
S1
S2
S3
Energy [keV]