Correlation signal OASys to Zero field

Rikkyo University Murata.lab / RIKEN　Master course 2nd　 Kentaro Watanbe

Murata .Lab 2012Last Group Meeting

Correlation signalOASys to Zero field

1

2

①

⑤④

③

②

⑦

⑥

half octant

half octant

motivation : What is OASys signal ??

I investigate the correlation half octant movement to the most inner OASys camera on each half octant.

South Arm

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South Arm track map March Zero field

South Arm track map May Zero field

Run9 South Arm Conditions・ octant 7 half octant 1 is dead area.

octant 7 half 1

octant 7 half 1

track efficiency movment

Normalized Sagitta distribution March Zerof & May Zerof Black: March data , Red May data

South arm sagitta distribution is normalized -2cm to 2cm

South Arm : the movement of Zero field mean & OASys

dead octantOctant 7-1

dead octantOctant 4-2

↑ it seems to be healthy tracks

South Arm に関しては dead octant (oct 7-1) を除くと、その変位は８０日間で OASys、 Zero field共に±200μmである。この中に相関があるかどうかを評価したい。

South Arm : the movement of Zero field mean & OASys

Almost half octant ID is 1

Almost half octant ID is 2

①

⑤④③

②

⑦

⑥

half octant

half octant

しかし、大事な点は OASysとZero fieldの間に相関があるかどうか？

South Arm : the movement of Zero field mean & OASys

North Arm

North Arm : the movement of Zero field mean & OASys

こりゃ非道！！！Zero field 合ってる？？これが本当だと大変な事だもっかい解析して

North Arm : the movement of Zero field mean & OASys

North Arm : the movement of Zero field mean & OASys

March

May

st1 march : oct 2-2 dead

st1 march : recovered

st3 march : oct 5-1 dead

統計量の変動

the efficiency par half octant is different in the term ??

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Normalized Sagitta distribution March Zerof & May Zerof Black: March data , Red May data

North arm sagitta distribution is normalized -2cm to 2cm

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拡大して見て更にわかる様に中心値はズレています。 fittigによるズレでわなく。生データの段階でズレてます。よって、このmeanのズレは BGの揺らぎから来ているのか？ tarck のイベントセレクションを行う事で、変化するのであろうか？？んー疑わしいが、イベントセレクションしてみます。

800μmとかズレちゃう連中。0

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ちなみに southを見るとこんなにもキレイ！！