1. Short Summary of the Japan- Korea meeting @ KNU Oct-3 2007 GLDCAL meeting S. Uozumi (Shinshu) 3 rd Japan-Korea joint meeting is held on Oct-1 2007 at Kyunpook National University, Korea. Largest topic of the meeting is discussion about extruded scintillator R&D. MPPC properties were also reported from Japan side.

2. Talks MPPC recovery time & response curve (Sudo) MPPC low temperature behavior (Otono) Strip scintillator comparison (Nishiyama) DESY BT analysis (Daniel) KEK BT plan (Uozumi) Status of extruded scintillator (Jun)

3. Discussions on current results Why the extruded scintillator shows such non-uniformity? KNU guys mentioned the non-uniformity shown in BT result looks rather consistent with KNU measurement in last year.

4. Discussions on current results Direct and extruded strips show similar behavior. The photons don’t transmit through fiber with extruded scintillator?

5. Strip response position dependence (measured in Shinshu) KNU guys argued about painting of strip edge. Why this shape of non-uniformity is inconsistent with DESY BT result and KNU measurement ? Need to measure again for a check.

6. Kuraray strip KNU strip with TiO2 KNU strip w/o TiO2 3mm Produced extruded scintillators

7. Extruded scintillator with / without fiber Kuraray strip KNU strip with TiO2 KNU strip w/o TiO2 3m m

8. Light yield of extruded scintillators with different reflectors Reference Tile[Japan] Relative L.Y. with Sr90 source Fully covered with 3M film 100% Only 4 sides with 3M film 86% Uncovered 34% Extruded strip with TiO 2 reflector Fully covered with 3M film 81% Uncovered 70%

9. e-e- Trigger Counters Veto counter Movable stage SciFi tracker Strip scintillators Trigger Counter KEK Beam Test Plan Establish extruded scintillator in advance to FNAL beam test. Various extruded scintillator strips will be scanned by MIP. Our beam time will be likely from Nov-19 to 25. 3 people will join from KNU, many from Japan.

10. Strips to be tested @ KEK BT 1.Extruded 3 mm thick fiber readout with TiO 2 2.Extruded 3 mm thick direct readout with TiO 2 3. Extruded 3 mm thick fiber readout without TiO 2 4. Extruded 3 mm thick direct readout without TiO 2 5.Extruded 3 mm thick fiber EMBEDDED readout with TiO 2 6.Extruded 3 mm thick fiber EMBEDDED readout without TiO 2 7.Extruded 2-2.5 mm thick fiber EMBEDDED readout with TiO 2 8.Extruded 2-2.5 mm thick fiber EMBEDDED readout without TiO 2 9.Extruded 2 mm thick direct readout with TiO 2 10. Extruded 2 mm thick direct readout without TiO 2 Kuraray strip 3 mm thick fiber readout Kuraray strip 3 mm thick direct readout Kuraray strip 2 mm thick direct readout Already made No problem to make Maybe in future

11. Visiting the extrusion factory

12. In near future… KEK Beam Test in next month (Will we have a small Japan-Korea meeting at KEK before the beam test ?) 4 th Japan-Korea joint meeting will be in first half of next year at Kobe.