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Scintillation detectors performance and status report

Scintillation detectors performance and status report. JSPS Core to Core Program Seminar and Hall-C HKS/HES collaboration meeting 8 May 2009 T.Gogami. HKS side. HTOF2Y. HTOF1Y. It had gaps between scintillators . (~3[mm]) Event loss >=5% Redesign. The former HTOF1Y.

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Scintillation detectors performance and status report

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  1. Scintillation detectors performance and status report JSPS Core to Core Program Seminar and Hall-C HKS/HES collaboration meeting 8 May 2009 T.Gogami

  2. HKS side HTOF2Y

  3. HTOF1Y • It had gaps between scintillators. (~3[mm]) Event loss >=5% Redesign The former HTOF1Y HTOF1Y with 3mm gaps between each scintillators in GEANT4

  4. HTOF1Y • Put scintillator zigzag • Position was optimized by GEANT4 K+ event loss ~0%

  5. HTOF1Y • Now it was already assembled • TOF resolution σ~100[ps] HTOF1Y @ EEL124 Cosmic ray test @ EEL126

  6. HTOF1X • TOF resolution σ~70[ps] cosmic ray test @EEL126

  7. HTOF2X • Check PMT performance & Light leak Found one segment leaks light • We have to fix it some day 350h×95w×20t ×18segments HTOF2X @ EEL124

  8. HTOF2Y • T0counter 35h×2000w×30t I have not assembled yet. HTOF2Y @ EEL126

  9. HES side EHODO3

  10. EHODO • TOF resolution σ~130[ps] • Local patch EHODO @ EEL126

  11. EHODO3 • T0 counter • timing resolution σ~100[ps] cosmic ray test @ EEL126 EHODO3 & EHODO

  12. summary

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