Clamp Prototype Install and Schedules

RIKEN/RBRCItaru Nakagawa

APR

• Muon Arm Upgrade for W boson Detection ( 含む Absorber effect 、 S/N) - ラルフ

• Muon Trigger Performance (efficiency w/ cosmic 等 Run10 データ解析） - 深尾- MuTr Cross Talk and Recapacitation effect - 今津- Recap clamp R&D - ケンタロー、中川

Deadline : Feb. 8

Clamp Schedule

2010 2011

12 1 2 3 4 5 6 7 8 9 10

Dry Air Cover Install

Prototype-1 Delivery

DeliveryInstall & Test50 more

Clamps

300 Clamps

Delivery

Install

Supply Parts

Road To Be Approved Clamp Install

• Evaluate X-Talk Quench Effect (Jan) -> Tsutomu’s Code

• Prove HV Performance (~July)• Budget• Production Schedule to be fit in by End of

October• Scaffold Construction

Cramp Production Schedule• 60 個（２ヶ月）– 発注：４月末　 -> 納品６月末

• ３２０個（２〜４ヶ月？）– 発注 : ６月〜８月 -> 納品９月＋１０月末（分納）– インストール４〜８週間

Bottom Line６月のパフォーマンスを確認後プロダクションへ（遅くて７月第一週）

部品調達２〜３週間を６月中に依頼すれば間に合うかも？クランプ取り付けのユーティリティーは満足できるレベル。プリント基板は Fix でよいか？基盤の製作を前倒しすればさらに speed up 。変更の可能性がある部分は•プローブ（ピン／ゴム）•コーティング剤の材質や塗り方？•電圧読み出しプローブ

Octant-8 Clamp Install

Octant 8

38103810

38103811

38113811

38123812

38133813

1-pin type

4-pin type

Installed Clamps (Octant-8)

Octant-7 Clamp Install

Octant 7

37103710

37103711

37113711

37123712

37133713

Conductive Rubber type

Dead in Run9Wire 192-223But fixed in Run10

Installed Clamps (Octant-7)

Clamp Prototype Install Summary

• 3 types of clamps (3 each are installed to North Station-3, Octant-7 and 8, Gap-0.

• Nearly 100% electrical contacts were achieved by the clamps without removing coating. -> Clamp works well!

• Will test with HV up to 1.5k with Ar/Co2 gas this week before closing the hatch.

• Observing relieved cross talk effect may be difficult because of partial coverage (only 30% of all anode wires in Oct-8, 15% in Oct-7).

Improving HV performance

1. Better Coating2. Dry air cover to Station-3

1. need to evaluate cost-effectiveness2. Can be kept as back up if the prototype clamps

behave poorly against HV

coating

• Turned out present anodes are mostly exposed to air. The existing coating is not isolating HV circuit from air well.

• Redo coating with higher viscosity type

Dry Air Cover Support

Dry Air Cover • Mechanical Design by REPIC

• First 2~3 Prototypes Delivery by Dec.28?

• Install in Maintenance Day

Dry Air Line Available @Oct8

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Muon Trigger Event Display

Developed by TsutomuShould Add RPC?

Task List• Run Plan

– Special Data Taking– Low B-field (Yoshi) – Zero suppression off run (different luminosity?) How many statistics needed?– MuTr HV Scan (Cosmic/Beam?)

• Dump Important parameters into Database (Yoshi+Katsuro) • Threshold, Latency, BCLK window, Logic, (Delta_s?, LUT?)

• Optimization of Parameters (Yoshi+Katsuro+Itaru)– Threshold .vs multiplicity– Logic– BCLK Window

• Low Level Online Monitor (Katsuro)• Stability monitor (Seoul)

• Low Level• Physics (J/psi) mass width, position, S/N, etc…

• Semi-Online Track Monitoring (Yoshi?)– Rejection power .vs rate– Efficiency .vs rate – Efficiency map