Onsite Status RIKEN/RBRC Itaru Nakagawa

OASys Light Source Spacer

New Spacer Filed off screw head

Light Spot with/without the Spacer 1.3mm 1.1mm w/o spacer w/ spacer 100 pixels shift out of 650 pixels observed in X direction. May be acceptable.

OASys DAQ System Cannot check South OASys. We have to wait until all SMM to be back on beam line

Thermocopules to North St-1

mk OASys Fast Offline Raw Datasub_ana.pl t.bat バッチ処理ファイ ル fit_ikeda.C 画像フィットマクロ sum.pl (log file からフィット ログ抜き出し） sum_stat.pl (mean,sigma の抜き出 し） MakeTRee.C 7 Fitting result Log files sum_stat.dat file i/o の low level 関数で新しい gcc ライブラリと非互換問題 -> fopen/fread で解決 mklist.pl -> File list

Recapacition Completed South Station-1 Gap-1

HV Test Station-1 Gap-1 are all OK. Some trips in Station2 and 3

Recap Clamp Installation

Recap Clamp Installed to Gap-2

Recapacitation Clamps What do we do with coating? – Physically scrape off -> Need develop tool – Chemically remove -> Under investigation – Heat it up -> Soldering Iron Inspection of the contact – Fiber Scope – Voltmeter

Fiber Scope Small diameter  =6mm Short Focus 5 ~ 10 mm Side mirror ~54,000Yen

クリップ型の開発史 難燃性抵抗 富士ゴム UL94-V2 ２〜３２〜３ 信越ゴム UL94-V0 １００〜４０ ０  14 Remove Coating Coating after installation Remove Coating Coating after installation Penetration Power of Coating Penetration Power of Coating

Summary Recap Clamps Alignment -> Spacer works OK. Visual Check -> Fiber Scope Contact Check -> Voltmeter new design Conductive Rubber – Coating Removal – Re-coating after installation -> Splay type works? Folk Type – Penetration power? – Pre-coating on recap clamp works?

Remaining Tasks 1.Further contact test of the clamp with voltmeter. 2.Pre-coating the recap clamp 3.Diagnose OASys Camera N2 4.Station-2 Terminator install 5.Toggle switch South St.2 ADTX -> but no power 6.St-1 terminator install (Mike next week) 7.OASys light source install (Mike next week) 8.South OASys check

Re-run Muon Trigger South fibers Re-run MuTR cables South OASys Check South St-2 Oct7 ADTX threshold test Re-run Muon Trigger South fibers Re-run MuTR cables South OASys Check South St-2 Oct7 ADTX threshold test Oct 27 – 29 RBRC Review Oct 27 – 29 RBRC Review