XIS Calibration on the GroundXIS Calibration on the GroundStatus ReportStatus Report
K. Hayashida (Osaka University) aK. Hayashida (Osaka University) and the XIS-team nd the XIS-team
XIS ComponentsXIS Components XIS-SensorsXIS-Sensors
CCID41-FI CCDCCID41-FI CCDEU (Engineering Unit)EU (Engineering Unit)FM FM FI0FI0,,FI1FI1,,FI2,FI3FI2,FI3
• CCID41-BI CCDCCID41-BI CCD• FM FM BI0BI0,,BI1BI1
AE/TCEAE/TCE FM AE/TCE01,23FM AE/TCE01,23 EM AE/TCEEM AE/TCE
DEDE FM 4PPU+MPUFM 4PPU+MPU
XRT
SensorAE/TCE
to DPMPU
PPU
PPU
Bonnet
Base
DE
FM Spare before LaunchFM Spare before Launch
Calibration Task ShareCalibration Task ShareComponentsComponents LocationLocation X-ray SourceX-ray Source QE referenceQE reference
Chip levelChip level CSR/MITCSR/MIT Fluorescent X-rays (C,O,Fluorescent X-rays (C,O,F,Al,Si,P,Ti,Mn,Cu)F,Al,Si,P,Ti,Mn,Cu)
ACIS chips ACIS chips calibrated at calibrated at BESSYBESSY
Camera Camera without OBFwithout OBF+FM AE+FM AE
OsakaOsaka Grating SpectrometerGrating Spectrometer0.2-2.2keV0.2-2.2keV
Polypro-window Polypro-window Gas PC & XIS-Gas PC & XIS-EUEU
KyotoKyoto Fluorescent X-rays (Al,CFluorescent X-rays (Al,Cl,Ti,Mn,Fe,Zn,Se)l,Ti,Mn,Fe,Zn,Se)
Window-less Window-less SSDSSD
OBFOBF Synchrotron Synchrotron FacilityFacility
Synchrotron X-rays + moSynchrotron X-rays + monochrometernochrometer
(Transmission (Transmission measurement measurement with PIN diode)with PIN diode)
Camera Camera onboard the onboard the satellitesatellite
ISAS/JAXAISAS/JAXA 55Fe55Fe
XIS Data ReductionXIS Data Reduction
Frame Data /8secFrame Data /8secDark-level SubtractionDark-level SubtractionEvent Pickup (PH(E)>Event Threshold)Event Pickup (PH(E)>Event Threshold)5x5 mode, 3x3 mode or 2x2 mode 5x5 mode, 3x3 mode or 2x2 mode
Event dataEvent dataCharge Trail CorrectionCharge Trail CorrectionGrading / PHA-reproduction for PH(i)>Split ThGrading / PHA-reproduction for PH(i)>Split Th
resholdresholdPHA-dependent Split Threshold for BIPHA-dependent Split Threshold for BI
Bad Columns FilterBad Columns Filter Spectrum / Image / Light CurveSpectrum / Image / Light Curve
Onb
oard
DE
On
the
grou
nd
XIS Response depends on the reduction procedure
Event Grades Event Grades Grades 02346 are used as X-ray events.Grades 02346 are used as X-ray events.
※
grade0
grade1
grade2
grade3
grade4
grade5
grade6
grade7
BI1BI1 Mn K incidenceMn K incidencePH(2)PH(2) = preceding pixel = preceding pixel ,,PH(7)PH(7) =trailing pix=trailing pix
elel
PH [ADU] PH [ADU]
PH [ADU]PH [ADU]
Near readout node
Far from readout node
Amount of Charge in the TrailAmount of Charge in the Trail
BI1
PH(7
)Cen
ter [
AD
U]
CTI = (4.5±0.3)×10 [ /Transfer ]-6
CTI estimated from this trail
Mn K
Number of V-Transfer in the Imaging Area
*) temperature dependence was observed
Incident X-ray Energy Dependence Incident X-ray Energy Dependence
VCTI= (1.72 ・ 10 )×E- 0.5- 4
HCTI= (6.06 ・ 10 )×E- 0.5- 4
We can tell the amount of charge deposited in PH(7) and PH(5) => Charge Trail Correction
電荷漏れ補正後の電荷漏れ補正後の PH(2)PH(2) 、PH(7)の波高分布 (M、PH(7)の波高分布 (Mn K)n K)
PH [ADU] PH [ADU]
PH [ADU]PH [ADU]
PH [ADU] PH [ADU]
PH [ADU]PH [ADU]
Effects of Charge Trail CorrectionEffects of Charge Trail Correction
Correct Grade Branching Ratio and PH()Correct Grade Branching Ratio and PH()Reduce Grade7 events due to Charge Trail. Reduce Grade7 events due to Charge Trail.
10%-20% increase in Grade02346 ratio at 10%-20% increase in Grade02346 ratio at high energies.high energies.
Restore Non-uniformity in effective QE.Restore Non-uniformity in effective QE. (Partial) Restoration in the Energy Scale.(Partial) Restoration in the Energy Scale.
Traps with Other time scales are not negligible. Traps with Other time scales are not negligible.
電荷漏れ補正後のグレード分岐比 (FI電荷漏れ補正後のグレード分岐比 (FI2)2)
バッドコラム除去
電荷漏れ補正後のグレード分岐比 (F電荷漏れ補正後のグレード分岐比 (FI2)I2)
電荷漏れ補正後のグレード分岐比 (B電荷漏れ補正後のグレード分岐比 (BI1)I1)
バッドコラム除去
電荷漏れ補正後のグレード分岐比 (B電荷漏れ補正後のグレード分岐比 (BI1)I1)
Optimization of Split Threshold for Optimization of Split Threshold for BI1BI1 G02346 event numberG02346 event number FWHM (eV)FWHM (eV)
Spth (ADU)
PHA-dependent SpThPHA-dependent SpTh
4
6
8
10
12
14
16
0.1 1 101
spth_20050309
5percent_plus2adu3percent_plus2adu97%/spth=20ADU0.5%/ADU
y = 9.6236 + 1.6084log(x) R= 0.898
y = 10.359 + 2.2075log(x) R= 0.93167
y = 9.577 + 2.7211log(x) R= 0.97172
y = 11.313 + 3.3202log(x) R= 0.96443
Ex(keV)
Bad (CTE) ColumnsBad (CTE) Columns Bad CTEBad CTE
Typically long trail in each event.Typically long trail in each event. Sometimes flickering pixel is observed.Sometimes flickering pixel is observed. Rows near the readout node can be used.Rows near the readout node can be used.
Identification logic without accumulating Identification logic without accumulating 10^7events was developed. 10^7events was developed. EU= 21 bad columns/chipEU= 21 bad columns/chip FI0=14, FI1=12, FI2=17,FI3=24FI0=14, FI1=12, FI2=17,FI3=24 BI0=23, BI1=50BI0=23, BI1=50
How should we do for adjacent columns ?How should we do for adjacent columns ?
X-ray image (number of events /pixel)
バッドコラム その1バッドコラム その1 (1) BAD CTE / Trail Column
PH22 PH7 PH0 PH2 PH11 ACTX ACTY V 25 55 381 271 1 / 668 325V 27 61 1029 4 -1 / 668 336V 30 64 1490 -2 -1 / 668 239V 24 54 1471 1 1 / 668 729V 22 62 1043 164 -2 / 668 239V 22 44 1672 1 1 / 668 221V 32 145 1316 3 0 / 668 570
<PH[7]-PH[2]> で判別可能 (e.g. >8AU)
バッドコラム その2バッドコラム その2(2)BAD CTE Columns
PH22 PH7 PH0 PH2 PH11 ACTX ACTY V 189 393 551 486 6 / 238 897V 4 6 1565 7 0 / 238 97V 179 353 549 346 3 / 238 798V 0 5 1548 3 2 / 238 171V 109 293 498 335 4 / 238 610V 204 394 565 459 8 / 238 919
PH[7]>SplitTH(e.g.20) && PH[2]>SplitTH(e.g.20) のイベントの割合( e.g. >0.2) で判別可能
バッドコラムその3バッドコラムその3(3) Flickerging Pixels
PH22 PH7 PH0 PH2 PH11 ACTX ACTY V 26 74 81 42 17 / 51 879V 1 5 58 1 -3 / 51 262V -1 -2 54 2 3 / 51 262V -1 3 75 1 1 / 51 262V 0 671 945 2 0 / 51 272V 1 2 1779 1 2 / 51 717
ピクセル毎のイベントの頻度で判別可能 (e.g.>0.1c/frame)
1
101
102
103
104
0 500 1000 1500 2000
BI1 segB
BI1b_nobc3BI1b_bc1BI1b_bc3-bc1
PHA(ch)
1
101
102
103
104
0 500 1000 1500 2000
BI1 segB
BI1b_nobc3BI1b_bc1BI1b_bc3-bc1
PHA(ch)
1
101
102
103
104
0 500 1000 1500 2000
BI1 segB
BI1b_nobc3BI1b_bc1BI1b_bc3-bc1
PHA(ch)
Kyoto Cal Kyoto Cal SystemSystem
Fluorescent X-rays (AFluorescent X-rays (Al,Cl,Ti,Mn,Fe,Zn,Se)l,Cl,Ti,Mn,Fe,Zn,Se)
Windowless Si-SSD is Windowless Si-SSD is used as the reference used as the reference counter, assuming 10counter, assuming 100% efficiency >1.5keV0% efficiency >1.5keV
XIS FI-CCD XIS FI-CCD QE=96%@4.5keVQE=96%@4.5keV is a is assumedssumed
Detector Chamber
Manson Soft X-ray Generator
Hetrick Spectrometer
Calibration Facility in the Osaka Calibration Facility in the Osaka Clean Room Clean Room
Dispersion (Grating) Dispersion (Grating) SpectrumSpectrum
X-ray imageX-ray image
O-Kα( 0.53keV )
C-Kα(0.28keV)
X-ra
y en
ergy
Number of events/columns
Dispersion direction
projection
FWHM ~ 5eV
Line profile against O-K line incidenceLine profile against O-K line incidence Astro-E1 (FI) XISAstro-E1 (FI) XIS
5 kV
PHA(ADU)XIS1 (H.Katayama master thesis)
FI2
Astro-E2 (FI) XISAstro-E2 (FI) XIS
Line Profile model(1) Main Peak :
Absorption in Depletion Layer(2) Sub Peak : Lost
charge below Split-threshold(3) Triangle Comp. :
Channel Stop origin(4) Constant Comp. :
Partial absorption in SiO2
parameters :T1 (normalization), C1(center), S1(sigma)
T2 (relative to T1), C2(spth/2, fixed), S2 (1.78×S1, fixed)
T3 (relative to T1), F3( 三角形の幅 , 0.5×C1)
T4 (T1 で規格化した面積 ) → フリーパラメタ 6 個 でフィット
F3
BI structure
Line profile for FI1 sensor
T2=0.033, T4=0.0052 T2=0.020, T4=0.0045 (Seg.B)
O-K lineE=0.525keV
Se-L lineE=1.379keV
Line profile for BI1 sensorO-K lineE=0.525keV
T2=0.19, T4=0.015 T2=0.071, T4=0.011 T2=0.078, T4=0.016
Al-K lineE=1.487keV
C-K lineE=0.277keV
スペクトルの比較スペクトルの比較FI2 g02346
カウントカウント数 数 エネルギー分解能 エネルギー分解能 [e[eV]V]
補正前補正前 422615422615 134.3±0.2134.3±0.2補正後補正後 422923422923 134.4±0.2134.4±0.2補正+バッドコラム除去補正+バッドコラム除去 415933415933 133.7±0.2133.7±0.2
スペクトルの比較スペクトルの比較FI2 g02346
カウントカウント数 数 エネルギー分解能 エネルギー分解能 [e[eV]V]
補正前補正前 120393120393 171.4±0.5171.4±0.5補正後補正後 120708120708 171.4±0.5171.4±0.5補正+バッドコラム除去補正+バッドコラム除去 118783118783 170.4±0.5170.4±0.5
スペクトルの比較スペクトルの比較BI1 g02346
カウントカウント数 数 エネルギー分解能 エネルギー分解能 [e[eV]V]
補正前補正前 273272273272 133.1±0.2133.1±0.2補正後補正後 302360302360 131.2±0.2131.2±0.2補正+バッドコラム除去補正+バッドコラム除去 288983288983 131.0±0.2131.0±0.2
スペクトルの比較スペクトルの比較BI1 g02346
カウントカウント数 数 エネルギー分解能 エネルギー分解能 [e[eV]V]
補正前補正前 6240362403 165.7±0.6165.7±0.6補正後補正後 7205772057 163.0±0.6163.0±0.6補正+バッドコラム除去補正+バッドコラム除去 6889468894 162.6±0.6162.6±0.6
Energy and Pulse-height LinearityBI1, Seg.CFI1, Seg.C
Energy Resolution (FWHM)FI-1, Seg.C BI-1, Seg.C
Quantumn Efficiency MeasurementQuantumn Efficiency Measurement Relative Efficiencies of FM-Relative Efficiencies of FM-
FI0,FI1,FI2,FI3,BI0,BI1 and XIS-EU are FI0,FI1,FI2,FI3,BI0,BI1 and XIS-EU are measured by irradiating X-rays from the measured by irradiating X-rays from the spectrometer to whole the CCD area. spectrometer to whole the CCD area. Generator beam current is always monitored and Generator beam current is always monitored and
stabilized <1%.stabilized <1%. XIS-EU was cross-calibrated to a Gas PC on XIS-EU was cross-calibrated to a Gas PC on
2003Dec & 2004Jul. XIS-FM are not installed in 2003Dec & 2004Jul. XIS-FM are not installed in the chamber with the Gas PC simultaneously.the chamber with the Gas PC simultaneously.
The gas PC was calibrated through the slant The gas PC was calibrated through the slant incident method in 2004 January. incident method in 2004 January.
X-raysX-rays
Slant Incident Method: Application Slant Incident Method: Application to Gas PCto Gas PC
We determined to use the Gas PC as the reference counter
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0.2 0.4 0.6 0.8 1
coun
t rat
e ra
tio
Ex (keV)
30°/0°
45°/0°
Ratio of Counting rate of Gas PC
Best fit estimateBest fit estimate
Poly propylene Poly propylene thicknessthickness
1.011.01±0.06±0.06mm
HH22OO 0.2810.281±0.048±0.048mm
P10gas dead P10gas dead layerlayer
79.6±9.779.6±9.7mm
20042004 年1月実験の年1月実験の再解析再解析 比例計数管の窓のメッシュ比例計数管の窓のメッシュ
5050mm 厚、厚、 0.5mm0.5mm ピッチピッチ開口率開口率 0.763 (X0.763 (X 線で実測)線で実測)断面○ではなく□を仮定断面○ではなく□を仮定
30°/0°30°/0° とと 45°/0°45°/0° を を 同時フィット 同時フィット X線発生装置の長期変 X線発生装置の長期変 動を補正 動を補正
XIS-EU and Gas PC cross XIS-EU and Gas PC cross calibration using a entrance slit calibration using a entrance slit
X-rays through Slit ( ~1mm)X-rays through Slit ( ~1mm)
Dispersion Direction
PC (0.525keV) XIS-EU (0.525keV)
PC Spectra and CCD Spectra PC Spectra and CCD Spectra
0.01
0.1
1
0.2 0.4 0.6 0.8 1
XISEU-QE(2004Jul)XISEU-QE(2003Dec)XISEU-QE model(200500315version)
XIS
EU
-QE
Ex(keV)
Best Fit EstimatesBest Fit Estimates
SiO2SiO2 0.4710.471±0.039±0.039mm
SiSi 0.2050.205±0.029±0.029mm
Si3N4Si3N4 0.000±0.030.000±0.03mm
Si depletion 65m fixedm fixed
Constant Constant FactorFactor
0.852±0.0350.852±0.035
-1deg offset slant-PC is assumed
Relative QE XIS-EU Relative QE XIS-EU
FI0 FI1
FI2 FI3
Red=line component
Relative QE of BI0,BI1 to XIS-EURelative QE of BI0,BI1 to XIS-EU
BI0 BI1
~ [email protected] keV~ [email protected] keV
0.01
0.1
1
1 10
XIS FI1 QE
FI1-QE(Osaka)
FI1-QE(Kyoto)
Ex(keV)
0.01
0.1
1
1 10
XIS FI1 QE
FI1-QE(Osaka)
FI1-QE(Kyoto)x0.8
FI1 QEmodel
Ex(keV)
Best Fit Best Fit EstimatesEstimates
SiO2SiO2 0.4430.443±0.039±0.039mm
SiSi 0.1810.181±0.029±0.029mm
Si3N4Si3N4 0.000±0.0160.000±0.016mm
Si depletion
68.9±1.7±1.7mm
Constant Constant FactorFactor
0.857±0.0030.857±0.003
-1deg offset slant-PC is assumed
0.01
0.1
1
1 10
XIS FI1 QE
FI1-QE(Osaka)
FI1-QE(Kyoto)
FI2-QE(MIT)
Ex(keV)
XAFS near the O-KedgeXAFS near the O-Kedge
FI-2
Eedge = 0.532 ±0.001 keV red.2 = 1.3178 (d.o.f. = 418)
0.1
1
1 10
XIS BI1 QE
BI1-QE(Osaka -1deg)BI1-QE(Kyoto)BI1-QE(Osaka 0deg)BI1-QE(Osaka +1deg)BI1 QEmodel with H2OBI1 QEmoel without H2O
Ex(keV)
Best Fit Best Fit EstimatesEstimates
HfO2HfO2 0.0050.005m fixedm fixed
AgAg 0.0010.001m fixedm fixed
SiO2SiO2 0.000±0.00050.000±0.0005mm
Si depletion
45.7±0.7±0.7mm
Constant Constant FactorFactor
0.934±0.0030.934±0.003
-1deg offset slant-PC is assumed
Upper limit of Surface dead layer in BI-CCDUpper limit of Surface dead layer in BI-CCD
0.45 0.5 0.55 0.6 keV
H2O on BI1 <0.11 μm
Dispersion Spectrum with BIμm
(H2O
)
0.1
1
1 10
XIS BI1 QE
BI1-QE(Osaka -1deg)BI1-QE(Kyoto)BI1-QE(Osaka 0deg)BI1-QE(Osaka +1deg)BI1 QEmodel with H2OBI1 QEmoel without H2O
Ex(keV)
0.1
1
1 10
XIS BI1 QE
BI1-QE(Osaka -1deg)BI1-QE(Kyoto)BI1-QE(Osaka 0deg)BI1-QE(Osaka +1deg)BI1-QE(MIT)BI1 QEmodel with H2OBI1 QEmoel without H2O
Ex(keV)
0.1
1
0.2 0.4 0.6 0.8 1
pcqe 7:40:42 2005/02/25
PC QE (2005/02/14 version)
QE
mod
el
Ex (keV)
PC QE model
Detailed (FI) Gate StructureDetailed (FI) Gate Structure
Area_ratio_gate=0.125(=3Area_ratio_gate=0.125(=3m)m) Additional_gate_thickness / slab_thicknessAdditional_gate_thickness / slab_thickness
SiO2:0.7SiO2:0.7 Si:1.0Si:1.0
Si3N4 0.026Si3N4 0.026m ?m ?
Channel Stop ParametersChannel Stop Parameters
Area_channelstop=0.0833 (=2Area_channelstop=0.0833 (=2m/24m/24m)m) Channelstop_thicknessChannelstop_thickness
SiO2:0.35SiO2:0.35mm Si:0.45Si:0.45mm
Absolute QE issuesAbsolute QE issues Reconsider the assumptionsReconsider the assumptions
96% at 4.5keV for XIS-FI Check grade7 events ?
Gas PC window model Mesh measurement ?
ACIS BESSY calibration How was the effective area or normalization calibrated ?
How about Channel Stop events ? Hidden dead space in FI ? Adopt the BI1 QE as a reference
BI QE should not be 1 (at least a few % grade 7 events) How do we model F_data-reduction ?
Application of the Slant Incidence method to BI0 after the Astro-E2 launch. Any other good way for the absolute QE cal ?
Energy independent factor of 10% is not a problem. Edge structure of 10% might be a problem.
SummarySummary We have completed the calibration experiments We have completed the calibration experiments
on the ground for XIS flight models.on the ground for XIS flight models. Data reduction procedures were updated for Data reduction procedures were updated for
Astro-E2 XIS.Astro-E2 XIS. Conversion to FTOOLS will be required.Conversion to FTOOLS will be required.
Profile has less tail component than Astro-E1 Profile has less tail component than Astro-E1 XIS.XIS.
Relative QE between the XIS sensors were Relative QE between the XIS sensors were accurately measured <5%?.accurately measured <5%?.
We need further work on absolute QE.We need further work on absolute QE.