E949 Range Stack Detectors

Range Stack Scintillator (RS)

RS TDC
Trigger Counters or T-counters nominally define the fiducial acceptance. They are shorter than the rest of the range stack counters, 20.2" (520mm) instead of 72"(1.82m). They are also only 1/4"(6.35 mm) thick instead of the 3/4"(1.905cm) for the rest of the RS. The T-counters are located at a radial distance of 450mm.
E949 Range Stack
- Light Yield (1995-2002) (by layer)
- Attenuation Length (1995-2002) (by layer)
  Note improvement in LT-5 and 18-19, which have new scintillator.
  Data points are for 1995, 1996, 1997, 3 points for 1998, 2001, 2002.
- Light Yield (2002) (by counter)
- Light Yield (2001) (by counter)
- Attenuation Length (2002) (by counter)
- Attenuation Length (2001) (by counter)
- Instruction for RS light yield and attenuation length calculations
- Counter thicknesses (to come from jim or Benji?)
RS layers 2-19
RS Layers 18-19 were replaced as part of the BVL upgrade (11/3/99-5/1/00)
RS Layers 2-5 were replaced after we learned that we could get x2-3 more light and we had enough time to replace only L2-5.
- L2-5 installation 7/20/00 - 9/25/00.
- Study of new/old L2
- Purchase of new L2-5
PMTs/electronics
- PMT, base, splitters, cables
- TD's
RS Monitor System
- RS Monitor System

Range Stack Straw Chambers (RSSC)

The RSSC's are straw tube chambers, operated in limited-streamer mode. The time resolution of 50 ps (after the time-stretcher-circuit) allows a z-determination ~1 cm. These chambers have a factor of ~10 times less mass than the old ones.

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