1215˙ ஊ࿩ࣨ‫঺ڀݚ‬հ

CERN Sumemr
Summer Student Programme 2014 ࢀՃใࠂ౦‫ژ‬େֶେֶӃཧֶ‫ڀݚܥ‬Պ‫౎ژ‬େֶ ཧֶ‫ڀݚ‬Պ஛അঊହ
ᖊᏵnchikuma@hep.phys.s.u-tokyo.ac.jp
bansei0526@scphys.kyoto-u.ac.jp
2014 ೥ (ฏ੒ 26 ೥) 9 ݄ 2226 ೔Summer͸͡Ίʹ Student Programme

2.3‫׆ڀݚ‬ಈࢲ͸
2014
݄ 23 ೔͔Β8 ݄ 29 ೔·Ͱͷ
10 िؒ,2014,೥
6 ݄೥306 ೔͔Β
9 ݄ 5 ೔·Ͱɼ
CERN Ͱ։࠵͞ͱͯ͠
CERN ʹ଺ࡏͨ͠ɻ଺ࡏத͸
SummerStudentΕͨ SummerStudentProgramme
2014 ʹࢀՃ͖ͯ͠

2.3.1

Study of High Energy Positron Annihi-1CMSͷιϑτ΢ΣΞάϧʔϓ
SFT ʹॴଐ͠, GENAT410 िؒͷϓϩάϥϜͷؒɼ‫ڀݚ‬΍·ΘΓͷਓʑ·ͨ͠ɻʹ͓͚ΔߴΤωϧΪʔཅిࢠͷରফ໓աఔʹ͍ͭͯ‫ݚ‬͔Β୔ࢁͷ͜ͱΛֶͼ·ͨ͠ɻ͜ͷ৔Λ͓आΓͯ͠ɼࢲ‫ڀ‬Λߦͬͨɻ‫׆ڀݚ‬ಈҎ֎ʹ΋ߨٛ΍ϫʔΫγϣοϓΛ
ͷ CERN Ͱͷ࢓ࣄɼϓϩάϥϜͷ಺༰ɼੜ‫͍ͯͭʹ׆‬௨ͯ͠ଟ͘ͷ͜ͱΛֶͼशಘ͢Δ͜ͱ͕Ͱ͖, ·ͨ೔ຊͷใࠂΛ͍͖ͤͯͨͩ͞·͢ɻͱ͸ҟͳΔੜ‫׆‬श‫׳‬΍‫׆ڀݚʹڞ‬ಈΛͨ͠༑ਓ͔ͨͪΒͷܹࢗʹΑͬͯಘΒΕͨ΋ͷ΋ଟ͋ͬͨ͘ɻ͜͜Ͱ͸,2 ‫ڀݚ‬Ͱͷ‫׆‬ಈ಺༰ͱ଺ࡏதͰಘΒΕͨ‫͍ͯͭݧܦ‬ใ
CERN
ࠂ͢Δɻ
2.1

‫಺ڀݚ‬༰

lation in GEANT4
ཅిࢠ͸෺࣭தΛ௨ա͢Δͱ෺࣭‫ࢠݪ‬தͷిࢠͱର
ফ໓͢Δ͜ͱʹΑͬͯೋͭͷޫࢠΛੜ੒͢Δɻ͔͠͠ཅ
ిࢠͷΤωϧΪʔ͕े෼ʹେ͖͘ͳΔͱରফ໓ʹΑͬͯϛϡʔΦϯϖΞΛੜ੒͢Δ͜ͱ͕ՄೳʹͳΔ (ਤ 1)ɻͦͷΤωϧΪʔᮢ஋ Eth ͸, ࣮‫͍͓ͯʹܥࣨݧ‬,2m2µCMSme ‫ݕ‬ग़‫ث‬≈ 43.69 GeV
Eth = ਤ 1: −me(1)Ͱ༩͑ΒΕΔɻ͞ΒʹߴΤωϧΪʔͰ͸, ͦΕͧΕຊϓϩάϥϜͰࢲ͕୲౰ͨ͠ͷ͸ɼCMS detect ࣮‫ݧ‬ͷΤωϧΪʔᮢ஋ʹରԠͯ͠ (π + , π − ), (π + .π − , π 0 ),ग़͢ΔΞϧΰϦζϜΛվྑ͢Δ͜ͱͰ͢ɻ͜Ε͸ϛϡʔ(K + , K − ), (KL , KS ), (η, γ), (π 0 , γ) ͳͲͷϋυϩϯ΋ੜ੒͠ಘΔΑ͏ʹͳΔɻ

2‫׆‬ಈ಺༰ͷϛϡʔΦϯ‫ݕ‬ग़‫ث‬ώοτ͔ΒϛϡʔΦϯީิࣄ৅Λந
2.1LectureΦϯͷඈ੻࠶ߏ੒ͷͨΊʹ͸͔ܽͤͳ͍࡞‫Ͱۀ‬ɼ͜͜7 ݄ 1 ೔͔Βͷ 6 िؒ͸‫ޕ‬લதʹߨٛΛड͚Δ͜ͱ͕
Ͱநग़ɼબผ͞ΕͨϛϡʔΦϯީิࣄ৅Λ‫ʹݩ‬ϛϡʔΦ, ૉཻࢠ෺ཧ΍ඪ४໛‫ܕ‬ͷཧ࿦తͰ͖ͨɻ಺༰͸༷ʑͰϯͷඈ੻࠶ߏ੒ɼ͓Αͼ෺ཧղੳ͕ߦΘΕ·͢ɻ‫ߦݱ‬ͷͳ಺༰͔Β, ‫ݕ‬ग़‫ث‬, τϦΨʔ, DAQ ʹ͍ͭͯͳͲ࣮‫ݧ‬ΞϧΰϦζϜͰ͸र͏͜ͱͷͰ͖ͳ͍Α͏ͳϛϡʔΦϯతͳ಺༰ͷ΋ͷ·Ͱ͋ͬͨɻӳ‫ߨͰޠ‬ٛΛड͚Δͱ͍͏ީิࣄ৅΋બग़Ͱ͖Δ͜ͱΛ໨ඪʹ‫ڀݚ‬ΛਐΊ͖ͯ·͜ͱ͚ͩͰ΋ࢲʹͱͬͯ͸‫و‬ॏͳ‫͕ͨͬ͋Ͱݧܦ‬, ͦͷͨ͠ɻ಺༰΋͜Ε͔Βͷ‫ڀݚ‬ੜ‫ͯͬͱʹ׆‬༗ӹͰ͋Ζ͏ͱ‫͡ײ‬ΒΕΔ΋ͷ͹͔ΓͰ͋ͬͨɻ

2.2

CMS ‫ݕ‬ग़‫[ ث‬1]ɹ͜ΕΒͷߴΤωϧΪʔి࣓൓Ԡաఔͷ‫͜ى‬Δ֬཰͸ 10−6 ͔Β 10−5 ఔ౓ͱඇৗʹখ͍͕͞, LHC ͷ 13TeV ϥϯʹ͓͚Δ৽෺ཧͷ୳ࡧ [1] ΍ CLIC[2] ͳͲͷઢ‫ܗ‬Ճ଎‫͍͓ͯʹݧ࣮ث‬͸ॏཁͳόοΫάϥ΢ϯυͱͳΓಘΔͨΊਖ਼֬ͳ༧ଌ͕ඞཁͱͳΔɻຊ‫Ͱڀݚ‬͸ਤ 2: ‫ݕ‬ग़‫ث‬ͷͦΕͧΕͷύʔτཻ͕ࢠΛ‫ݕ‬ग़͍ͯ͠Δ
GEANT4(vesion 10.01.b01) ʹ͓͍ͯ͜ΕΒͷաఔͷ൓֓ཁਤԠஅ໘ੵͷ validation Λߦͬͨ‫ޙ‬, ؆୯ͳγϛϡϨʔγϣϯΛ࣮ߦͨ͠ɻ
e+µ−CMS ‫ݕ‬ग़‫ث‬͸ Higgs ཻࢠ΍ SM Λ௒͑Δ෺ཧͷ୳ࡧ

2.2

VisitΛओͳ໨తͱͯ͠‫ݐ‬ઃ͞Εɼ‫ ࡏݱ‬LHC(Large Hadron͜ͷϓϩάϥϜதʹ͸
CERN ͷதͷ༷ʑͳࢪઃΛ‫ֶݟ‬ʹઃஔ͞Ε͍ͯΔ൚༻ཻࢠ‫ݕ‬ग़‫͢Ͱث‬ɻਤ1ʹCollider)γ∗͢Δ‫ػ‬ձ͕ଟ͘ઃ͚ΒΕ͍ͯͨɻATLAS, CMS, ALICE,CMS ‫ݕ‬ग़‫ث‬ͷ֓ཁਤΛࡌͤ·ͨ͠ɻ͜ΕΒͷਤ͔Β΋ͳͲͷ‫ݕ‬ग़‫ث‬͸΋ͪΖΜ, Data Centre ΍ AntiLHCbCMS ‫ݕ‬ग़‫ث‬͸ෳ਺ͷ෦෼͔Βߏ੒͞ΕΘ͔ΔΑ͏ʹɼͳͲͷࢪઃΛ‫ֶ͢ݟ‬Δ͜ͱ͕Ͱ͖ͨɻ
MatterFactory͓ͯΓɼͦΕͧΕͷύʔτ͕ಛఆͷཻࢠΛ‫ݕ‬ग़͢Δͷʹe−µ+ਤ 1: ϛϡʔΦϯϖΞΛੜ੒͢Δిࢠཅిࢠରফ໓ಛԽͨ͠ߏ଄ʹͳ͍ͬͯ·͢ɻਤ 2 ʹ֤ύʔτ͕ɼͦΕͧΕͲͷΑ͏ͳཻࢠΛͲͷΑ͏ʹ‫ݕ‬ग़͢Δͷ͔ͱ͍͏֓ཁਤ͕ࣔ͞Ε͍ͯ·͢ɻਤ 3: ϛϡʔΦϯγεςϜͷ֓ཁਤ

2216

2.3.2

Modification and Validation of High Energy Electromagnetic Process

GEANT4 ͷ Χ ʔ ω ϧ ͔ Β ి ࣓ ա ఔ ͷ ൓ Ԡ அ ໘ ੵΛ Ϣ ʔ β ʔ Ξ Ϋ γϣϯ ʹ औ Γ ग़ ͢ ͱ ͖, ϔ ϧ ύ ʔΫ ϥ ε G4EmCalculator ͕ ࢖ ༻ Ͱ ͖ Δ ɻ͜ ͷ Ϋ ϥε ͸ G4VEmProcess ͷ Έ Λ ࢀ র ͠ ͯ ͍ ͨ ͕, ࠓ ճ

G4AnnihiToMuPair ΋ࢀর͢ΔΑ͏ʹमਖ਼ΛՃ͑ͨ͜ͱͰ্‫ه‬ͷߴΤωϧΪʔి࣓աఔ͢΂ͯʹ͓͍ͯ൓Ԡஅ໘ੵΛѻ͑ΔΑ͏ʹͳͬͨ (ਤ 2)ɻ͜ΕΒ͢΂ͯͷΞοϓσʔτ͸ GEANT4 ͷ͢΂ͯͷ validation աఔΛ௨ա͠ CMS ιϑτ΢ΣΞͷ private patch ʹஔ͔Ε͍ͯΔɻਤ 3: ిࢠཅిࢠରফ໓աఔͷ‫ͨ͋ࢠݪ‬Γͷશஅ໘ੵɻԣ࣠͸ిࢠ੩ࢭ‫͚͓ʹܥ‬ΔཅిࢠͷશΤωϧΪʔɻ࣮ઢ͸ GEANT4 ͷஅ໘ੵ, ࡾ֯ͷϚʔΫ͸ཧ࿦‫ࢉܭ‬ɻਤ 2: ߴΤωϧΪʔి࣓աఔΛఆٛ͢ΔΫϥε͍ͭͮͯ, GEANT4 ͷ൓Ԡஅ໘ੵΛཧ࿦‫ͱࢉܭ‬ൺֱ͢Δ͜ͱʹΑͬͯ validation Λߦͬͨɻରফ໓ͷ‫ʹޙ‬ೋͭͷޫࢠ, ·ͨ͸ϛϡʔΦϯϖΞΛੜ੒͢Δաఔͷ൓Ԡਤ 4: ిࢠཅిࢠରফ໓ʹ͓͚Δϋυϩϯੜ੒աఔͱஅ໘ੵ͸࣍ͷΑ͏ʹ‫͞ࢉܭ‬ΕͨɻϛϡʔΦϯੜ੒աఔͷશஅ໘ੵൺ (PDG σʔλ)ɻR =σ(e+ e− → hadrons)/σ(e+ e− → µ+ µ− )ɻԣ࣠͸ॏ৺‫ܥ‬ʹ͓͚ΔશΤωϧΪʔɻσ(e+ e− → γγ)#!
"γ+3Zπre2 γ 2 + 4γ + 1=ln (γ + γ 2 − 1) − "γ+1γ2 − 1γ2 − 1(2)σ(e+ e− → µ+ µ− ) =πrµ2
3$

ξ 1+

ξ2%

"

1−ξ

(3)

݁ՌΛਤ 5 ʹࣔ͢ɻ֬཰ 10−6 ∼ 10−5 ͱখ͍͞ͳ͕Β΋͔֬ʹ͜ͷ൓Ԡ͕‫͜ى‬Δ͜ͱ͕֬ೝͰ͖, ࠓ‫ ޙ‬13 TeV

ͷ LHC Ͱߦ͏Α͏ͳߴΤωϧΪʔߴΠϕϯτϨʔτͱͳΔ࣮‫͍͓ͯʹݧ‬͸, ͜ΕΒͷ൓Ԡաఔʹ͍ͭͯ΋৻ॏʹ༧ଌ͢Δඞཁ͕͋Δ͜ͱ͕ࣔࠦ͞Εͨɻ͜ΕΒͷࣜʹ͓͍ͯ, E:ཅిࢠͷશΤωϧΪʔ (࣮‫ࣨݧ‬‫)ܥ‬, γ = E/me , re :‫ݹ‬యిࢠ൒‫ܘ‬, rµ = re me /mµ , ξ =Eth /E, Eth = 2m2µ /me − me Ͱ͋ΔɻGEANT4 ͷஅ3ੜ‫׆‬໘ͰͷΤϐιʔυ໘ੵ͸͜ͷཧ࿦‫ࢉܭ‬ͷ݁Ռͱਖ਼֬ʹҰக͢Δ͜ͱ͕֬ࢲ͸͜ͷϓϩάϥϜͷؒ, ϑϥϯεͷ St. Genis ʹ͋ೝͰ͖ͨ (ਤ 3)ɻϋυϩϯ΁ͷରফ໓աఔͷஅ໘ੵͷ

Δ CERN Hostel ʹ଺ࡏͨ͠ɻϗεςϧʹ͸, ಉ͡Α͏validation ͸, ϛϡʔΦϯϖΞ΁ͷରফ໓ͷஅ໘ੵͱͷʹ Summer Student ͱ֤ͯ͠ࠃ͔Βू·ֶͬͨੜ͕଺ൺΛ༻͍ͯ, Particle Data Group ͷ࣮‫ݧ‬σʔλ (ਤ 4)ࡏ͍ͯͯ͠, ൴Βͱͷ‫ڞ‬ಉੜ‫׆‬͸ඇৗʹ༗ҙٛͳ΋ͷͰͱൺֱ͢Δ͜ͱʹΑͬͯߦͬͨɻ͋ͬͨɻCERN Summer Student Programme ͸෺ཧͷֶੜ͚ͩͰͳ͘ engineer ΍ computer science ͷֶੜ΋

2.3.3

Simulation in a Simple SetupࢀՃ͍ͯ͠ΔͨΊ, ͦͷΑ͏ͳֶੜͱ CERN Ͱͷ‫ڀݚ‬ʹ͍ͭͯӳ‫Ͱޠ‬ٞ࿦Λͨ͠Γಉ͡ߨٛΛड͚ͯ൴ΒͱࣗߴΤωϧΪʔి࣓աఔʹ͍ͭͯ Validation ͕ऴྃ͠෼ͱͷཧղͷ࢓ํͷҧ͍Λ஌ͬͨΓͰ͖Δ͜ͱ͸, ࢲʹͨ‫ޙ‬, ͜ΕΒͷաఔ͕Ͳͷఔ౓ͷ֬཰Ͱ‫͜ى‬ΓಘΔͷ͔ͱͬͯॳΊͯͷ‫͋Ͱݧܦ‬Γ‫و‬ॏͳ΋ͷͱͳͬͨɻͦͷଞ֬ೝ͢ΔͨΊʹ, े෼ʹް͍ඪతΛ༻ҙ͠ 107 ‫ݸ‬ͷཅిʹ΋, ަ୅ͰͦΕͧΕࣗ෼ͷࠃͷྉཧΛօʹৼ෣ͬͨΓࢠΛরࣹ͢Δͱ͍͏؆୯ͳγϛϡϨʔγϣϯΛߦͬͨɻҰॹʹεϙʔπΛͨ͠ΓͳͲ, ͍ΘΏΔจԽͷҧ͍Λ‫ײ‬

3217‫ڀݚ‬Λ೚͞Εͨʹա͗ͳ͔͕ͬͨ, ͲͷձٞͰ΋ࣗ਎ͷ‫͍ͯͭʹڀݚ‬͸੹೚ऀͱͯ͠ѻΘΕ݁Ռ͕‫ٻ‬ΊΒΕͨɻ೔ຊͰ΋ T2K ࣮‫ॴʹݧ‬ଐ͠‫ڀݚ‬Λ࢝Ί͍ͯΔ͕, ࣗ෼ࣗ਎ͷ‫੹ʹڀݚ‬೚Λ࣋ͭ͜ͱΛ๨Εͣ, ·ͨࣗ৴Λ΋ͬ
ͯଓ͚Δ͜ͱ͕Ͱ͖ΔΑ͏ਫ਼ਐ͍͖͍ͯͨ͠ɻɹଞʹ͸, ‫ྗֶޠ‬ͷॏཁੑ΋վΊͯࢥ͍஌Β͞Εͨɻଞͷࠃ͔ΒࢀՃ͍ͯ͠Δ Summer Student ͨͪͷӳ‫ྗޠ‬͸໌Β͔ʹ೔ຊਓͷͦΕΑΓ΋༏Ε͍ͯͯ, ͍͘Βࣗ෼ͷํ͕ྑ͘ཧղ͍ͯ͠Δͱࢥͬͯ΋൴Βͷձ࿩ͷ଎͞ʹ͍͍͚ͭͯͣओுͰ͖ͳ͍, ͱ͍͏͜ͱ͕ CERN ౸ண௚‫ޙ‬͸ଟʑ͋ͬͨɻ͜ͷ 10 िؒͰࢲͷӳ‫ྗޠ‬΋গ͠͸ਤ 5: ཅిࢠ͕ରফ໓ʹΑͬͯϛϡʔΦϯϖΞ·ͨ͸ϋ޲্ͨ͠ͱࢥ͍ͬͯΔ͕, ࠓ‫ޙ‬೔ຊͰ΋ࠃࡍతͳ࣮‫ݧ‬άυϩϯΛੜ੒͢Δ֬཰ɻཅిࢠͷΤωϧΪʔΛ 1 TeV ʹϧʔϓʹॴଐ͠‫׆‬༂͢Δ΂͘, ͞Βʹ‫ྗֶޠ‬͸ߴΊ͍ͨ‫ݻ‬ఆͨ͠ͱ͖ͷ, ඪతͷ෺࣭ґଘΛࣔ͢ɻͱࢥ͍ͬͯΔɻ͡Δ‫ػ‬ձ͸ଟ͋ͬͨ͘ɻӳ‫͑͞ޠ‬࿩ͤΕ͹༷ʑͳࠃ͔Βͷ༑ਓͱίϛϡχέʔγϣϯΛͱΔ͜ͱ͕Ͱ͖, ൴Βࣗ5਎ͷ͜ͱ΍൴Βͷࠃͷ͜ͱʹ͍ͭͯ஌Εͨ͜ͱ͸·ͨͱࠓ‫͜ޙ‬ͷαϚʔενϡʔσϯτϓϩάϥϜʹ๬Ή͜ͱͳ͍‫ػ‬ձͰ͋ͬͨͱࢥ͏ɻɹࢲ͕΋ͬͱ΋‫͍ͨڻ‬ͷ͸೔ຊ‫ޠ‬΍೔ຊͷจԽʹ‫ڵ‬ຯΛࢲࣗ਎͸͜ͷ CERN Summer Student Programme ͷ͍࣋ͬͯͯ, ษ‫͍ͯ͠ڧ‬Δਓͷଟ͞Ͱ͋Δɻࢲ͔ΒΈΔؒे෼ʹຬ଍Ͱ͖Δ‫ڀݚ‬ੜ‫׆‬ΛૹΔ͜ͱ͕Ͱ͖ͨͨΊ,ͱ, ൴Β͸ࣗ෼ͷࠃʹ͍ͭͯ΋ඇৗʹྑ͘ཧղ͠, ͔ͭಛʹ͜ΕҎ্๬Ή΋ͷ͸ͳ͍ͱࢥ͍ͬͯΔɻ‫͏ݴ͍ͯڧ‬ࣗ৴Λ͍࣋ͬͯΔΑ͏ʹ΋‫ͨ͑ݟ‬ɻͦͷ্Ͱ೔ຊͷ͜ͱͳΒ͹, ΑΓଟ͘ͷ೔ຊਓֶੜʹ͜ͷϓϩάϥϜΛ‫ݧܦ‬ʹ΋‫ڵ‬ຯΛ࣋ͬͯ͘Ε͍ͯͨͷ͕ͩ, ͦͷΑ͏ͳ༑ਓͨ͢Δ‫ػ‬ձ͕͋Ε͹Α͍ͱࢥΘΕΔɻਓ਺͕ଟ͚Ε͹ྑ͍ͪͱ೔ຊͷ͜ͱΛ‫͕ͳ͑ڭ‬Β࿩͍ͯ͠Δͱ, վΊͯࢲࣗͷ͸΋ͪΖΜ, ೔ຊҎ֎ͷࠃͷΑ͏ʹ෺ཧҎ֎ͷ෼໺ͷ਎͕೔ຊͷ͜ͱΛΑ͘஌Βͳ͍͜ͱʹ‫͔ͮ͞ؾ‬Εͨɻֶੜʹ΋‫ػ‬ձ͕༩͑ΒΕΕ͹, ೔ຊਓಉ࢜ͷؒͰ΋ࠓΑΓ͞ΒʹֶͿ͜ͱ͕͋ΔͷͰ͸ͳ͍͔ͱࢥͬͨɻ6ँࣙ࠷‫ʹޙ‬, ͜ͷϓϩάϥϜʹࢀՃ͢Δʹ͋ͨΓ͓ੈ࿩ʹͳͬͨօ༷ʹਂ͘‫ँײ‬ਃ্͛͠·͢ɻ ͜ͷΑ͏ͳ‫و‬ॏͳ‫ػ‬ձΛ༩͑ͯͩͬͨ͘͞ KEK ͷօ༷, CERN Ͱͷ‫ݚ‬‫׆ڀ‬ಈΛࢧ͑ͯͩͬͨ͘͞ CMS SFT άϧʔϓͷօ༷,͜ͷϓϩάϥϜʹԠื͢Δࡍʹ͝ࢦಋͯͩͬͨ͘͠͞ԣ
ࢁ।‫ڭ‬त, ‫ ʹڞ‬Summer Student ͱͯ͠ࢀՃֶͨ͠ੜͷօ༷, ͦͷ΄͔͝‫͍͍ͨͩͨྗڠ‬ଟ͘ͷօ༷ʹ‫ྱޚ‬Λਃਤ 6: Summer Student ͷ༑ਓͨͪͱσΟφʔʹߦ্ͬͨ͛ͨ͘͠, ँࣙʹ͔͍͖͑ͤͯͨͩ͞·͢ɻͱ͖ɻӈ୺ʹࢲɻࢀߟจ‫ݙ‬4ࠓ‫ޙ‬ͷ๊ෛ

[1] Geant4 simulation of production and interactionof muons. A. G. Bogdanov, H. Burkhardt, V. N.

CERN Ͱͷ‫ڀݚ‬ੜ‫׆‬Λ௨ͯ͠, େ͖ͳάϧʔϓͷதʹ͍ͯ΋ҰਓͻͱΓͷ࢓ࣄͦΕͧΕ͕શମͱͯ͠ॏཁʹ

Ivanchenko et al. 2006. 7pp. Published in IEEE
Trans. Nucl. Sci. 53 (2):513-519, 2006.

ͳΓ, ͳ͓͔֤ͭʑ͕ࣗΒͷ࢓ࣄʹ੹೚Λ΋͍ͬͯΔ͜

[2] CLIC Conceptual Design Report. M. Aicheler, etal. CERN, 2012. -841 p.

ͱΛ࠶֬ೝͤ͞ΒΕͨɻ ࢲ͸ Summer Student ͱͯ͠CMS ͱ͍͏େ͖ͳάϧʔϓʹଐͦ͠ͷதͷ͘͝Ұ෦ͷ