P6????

1

• 2007??
• P6????
• On 2008/3/7

PART1 (???) Geant4 10?
by? PART2 (???) RX J1713.7-3946vs??????X??????
????????? 15? by?? PART3 (???)
?????????BG???????? 15? by?
2
PART1Geant4
??Geant4?????? ??Geant4?????
3
Geant4??GEometry ANd Tracking 4

• ?????????????????????????????TOOLKIT????
• ????????????????????????????????????
• User??????Geant4?????C???LIBARY???????????????Pr
  ogram????????????

4
Geant4???????????????

• ?????????????????????????????????????????????????

?????????????????????????????????????????????
???????Step????????????
5
Geant4???????????(1)????

• Detector Construction
• ????(Geometry)
• ????(Sensitive Detector)

• Primary Generation
• ???????
• (????????????
• -?????)

• Physics List
• ?????
• ?????????
• ????Cut Value

6
Geant4???????????(2)?????UserAction

• G4??????????Run?Event?Track?Step?????????????????
• User??????????G4UserAction????????????????????????
  ?????????
• Hit????????????

7
Geant4???????????

• Run??
• ??????

• Run??
• ?????????
• BeamOn?START

• ???
• Run-Manager
• Geometry
• Physics

???Geant4?????? ???G4????????
8
Geant4????????NaI?????????????? 2007/12/29

• ???
• 137Cs(662keV)
• 22Na(511keV1275keV)

????? LT1500Sec
9
Geant4?NaI???????

• PhysicsList
• ?????Compton??????????????????????????G4???????
• DetectorConstruction
• NaI?PMT?Pb?????????etc
• PrimaryGeneration
• ??????????????????????????

by Geant4
10
??????????
?137Cs ?22Na
511keV
662keV
1275keV
?????????????G4?????????????
11
G4???????????(Cs137)
?????? ?G4???? ?G4Gaussian
keV
ratio
12
G4???????????(Na22)
?????? ?G4Gaussian
counts
Pb? K??X?
?????? ?G4???? ?G4?????Gaussian???????
511keV? ??PEAK
1275keV? ??PEAK
keV
ratio
13
Part1????

• ???????????????????????????????
• Geant4????????User??????????????????????????????

14
RX J1713.7-3946 vs ??????X??????????????
PART2

• P6???
• ????

15
??

• 1.????
• 2.RX J1713.7-3946????
• 3.??????????
• 3-1.????????????
• 3-2.??????????
• 3-3.??p?e-????????????
• 4.??????????
• 4-1.??
• 4-2.?????6.4keV??
• 5.???

16
1.????

• ?????RX J1713.7-3946
• Fe????????????
• ?????
• ??Fe????????????????????

?
????X??????
17
2. RX J1713.7-3946????

• ???????????????(????????)?????
• ?? 1 kpc
• ?? 1600 yr (???????????!)
• ROSAT All-Sky Survey?????
• ASCA???????????????????????X?????????(Koyama et
  al. 1997)

18

• photon???????
• keV????lt?????
• TeVkeV????????????
• ?p origin(p0??)?
• e- origin(????????)?
• ??????????????????

Flux(/erg/cm2/s)
E.G.Berezhko,H.J.Volk 2006
Photon Energy(eV)
19
3.??????????

• 110keV??????????????????????
• ??????????

Observer
Molecular Cloud
20
?????

• ???????????p????????
• ??????????????

????? ???(???) H 85,He 14, C 0.6,O
0.3,Fe 0.1 ??? R1pc T10K density100/cc
p
e-
?
Molecular Cloud
21
????????????

• Geant4???Kinetic Energy??MeV??????????????????
• ?????????
• 10keV X???????????????????
• ?????????????????????????????

22
???????????keV X??????!?
????????????
1-1000keV
1-1000MeV
1-100TeV
1-1000GeV
e-
?
p
??
? or
????106??? ???????1-1000MeV??? 0.1???????? ??
??1-1000keV??????????
1MeV 1000MeV
23
photon????
E 1-1000 keV
E 1-1000 MeV
events
events
events
?
?
keV
keV
1-1000 GeV?1-100 TeV ? 6.4keV ? ???? 2event
???????????????
?1-3keV ???????????????????????? ?7 keV
??????????????
24
p????
K 1-1000 GeV
events
events
K 1-1000 MeV
keV
K 1-100 TeV
keV
events
???????6.4keV????? ???????????6.4keV X
??????????? 1-1000keV?p??(1keV???)X???????????? (
SetCutForSecondaryPhotons1keV ???(????))
keV
25
e-??????1
K 1-1000 keV
events
keV
K 1-1000 MeV
events
e-????????????K???????? (??) (V.Tatischeff 2002)
keV
26
e-??????2
K 1-1000 GeV
events
???????6.4keV????? ?????????????? ????6.4keV
X??????????????????
keV
K 1-100 TeV
events
keV
27
????????????? 10keV?X??????
?????????????
11000 keV
1100 TeV
11000 GeV
11000 MeV
?
?
?
?
e-

?
?
?
p
??
(??)
?
(??)
(??)

• e-???????????1-10keV X???????
• p???????????1-10keV X???????
• ????????1-??keV???

28
?????????????????1?
???e-?? ???????X?????????? ???????????????????????
?? ????????
step
chords
real trajectory

• ??????????????????X????????????????????????

29
?????????
?? ?????? ???????
TeV??flux????????flux?(???0.07)?? (Yamazaki et
al. 2006)
??
??
???10-3? (Yamazaki et al.2006)
???
???????X?
(Uchiyama et al. 2003)
30
????????????????????????
E
???? p? 1 MeV?1.3109? e-?1 keV?2.5109?
Synchrotron X ray ? 1 keV ? 1012?
31
4.?? 1-40 keV ?X??????
Synchrotron X? ??
6.4 keV
Flux (photon/keV/s)(keV)2
e- ??
p ??
40keV
32
??????
Flux (photon/keV/s)(keV)2
?(?????)
40keV
p,e-????????????????(Flux?0.001)
33
Gaussian????
????XIS?????130eV (FWHM)
????????
Flux (photon/keV/s)(keV)2
1-3keV????????
?????? gauss???? gauss????
40keV
34
5-8keV????
Flux (photon/keV/s)(keV)2
??? of 6.4keV ? 21.5eV
Kß K???
8keV
5keV
????????
35
??????????p0?????????????
?? ???????????????6.4keV Flux?????????????????????
???????????????
36
67.5MeV
6.4keV
p0 decay
Event??p0???????????????? ???????????
21261 events _at_ 6.4keV ?p origin 6.4 keV Flux?
8.71011 eV/s
37
Flux eV/s
E.G.Berezhko,H.J.Volk 2006
6??
ev
p0??????1018 eV/s? ?p origin 6.4keV Flux
??6????????
p origin 6.4keV Flux

• p?? 6.4keV ?????????????????????????

38
????????

• p,e-(?????????)????????6.4keV????????????
• ????X????????????6.4keV???????????
• ??????????????????????????1-3keV??????????????????
  ?????????????

39
??????????BackGround?????????
PART3

1. ???????????
2. ???????????
3. ??????????????
4. ???????????
5. ??????????????

? ?
40
???CosmicRay

• ??????????????????????
• ???????????????
• ??(Photon)
• ??(Electron)
• ??(Proton)
• ???

XIS??
41
???BackGround

• BG???????????
• ???BG???????(Anada.2005)?????????????BG????????
• ????????????????BG?????????(??????)

42

• ???X?????SUZAKU??????????X????????????XIS?????????
  ????Geant4?????????BG??????????
• ??????????????????????????????????????BG??????????
  ?????

43
????????
???????????????????????600km???????
Based on GLAST Balloon Experiment (Mizuno.2004)
44
????????
XIS?????????????????

• CCD???
• 100mm?100mm(??)
• ?100µm(??????)
• ?????
• ?????
• ??????
• (??????10g/cm2)
• ???

2005by??
2007 by p6
45
????????TYPE
???? ???? ????
TYPE0 ???? ??? ?? ?? 0
TYPE1 XIS??? Al37mm Au0.5µm 10g/cm2
TYPE2 ??? Au0.5µm Al37mm 10g/cm2
TYPE3 ??? Pb37mm ?? 42g/cm2
46

1. ?????????(????????)?????(???)?????
2. Geant4???????????
3. ??????????????????????????Count???????
4. ??(4p)???????????????????????Si??????????????
5. Si??????????????Data-file??????
6. Geant4???????????
7. ????Date-file????????????????????

47
??????
???BG(TYPE0?????)

• ??
• 1100keV?
• ???count???????
• ??
• 101000keV???????????
• ??
• 101000keV???????????????????

48
????????Stopping Power?????????????????
?????
??????? ?????g/cm2??????????dE/dx? Bethe????????
?
Proton
49
????????????????

• ???????????Si???????????
• ????????E(???dE/dx)(????????????d)
• ????????(vc)????????dE/dx?????????

• ????
• ???????????????????
• ??????????????PEAK?????
• PEAK?2MeVcm2/g??40keV??????

50
?Al 37 mm?Au 0.5 µm ???? 10g/cm2
???BG(????TPYE1?????)
SUZAKU?XIS???

• 20keV????????????BG???
• 20keV????????????BG???

??
??
??
51
????????TYPE???
?????
??????? ??AL ?Au ??Au ?Al
AlAu????
52
?????????BG??

• ????Al?Au??????????Compton??????????/?????????????
  ??????BG?4?5?????
• ???????(TPYE1?TYPE2)??BG??????????
• particles/cm2/sr/sec/keV?????????10?-5?????????
  ???

BG???????
?????????????????Compton?????????????????Z????????
?????????????
53
????????TYPE???
?????
??????? ??AL ?Au ??Au ?Al
AlAu ????
54
?????????BG???

• ?????????20keV???BG?????????20keV????BG???????????
  ???????????????????????????????????????????
• ???????(TYPE1?TYPE2)??????????Au?Al??Al?Au??BG????
  ?
• particles/cm2/sr/sec/keV?????????20keV????10?-
  5??20keV????10?-4????????????

BG???????

• ????(Z)?????(Z2)?????????????Z??????????????
• ????????????????????????????????BG???????

16
55
????????TYPE???
??????? ??AL ?Au ??Au ?Al
AlAu ????
?????
56
??BG???

• ???????????????????????BG????????(????????????????
  ???????)?
• ???????????????????20keV???BG?????????????????????
  ??!?
• ???? ??????????????(Au?????)?20keV???BG???????????
  ????????????????

BG?????

• 20keV???BG??????????(AL?Au?Pb??!)???????
• ???????????????????(1000MeV)??????????????(1cm)???
  ????????(1000G)???????????

57
????
????????????BG?????????? ??????1100keV?????????
?????
Emin dE/dx dmin Emax dE/dx dmax
??????????Emin?Emax??????? BG???(????????)??????
???100µm
???400µm
Emax
Emin
58
??????
?? 20keV???????????BG???? 20keV???????????BG???? ?????BG??????????????
?? ?????????????? ??XIS?????(10g/cm2)????????????BG?5???????
?? 20keV?????BG?????(????)?????? 20keV?????????????????BG???????Au????????????????
?? ???????????????????20keV???BG????? 20keV???BG?????????????????BG?????? BG?????????????????????????