PDT DeltaT Studies D. Hedin NIU 31202

1
PDT DeltaT Studies D. Hedin NIU
3-12-02

• Releases after p10.13 partially correct for time
  slewing by using an effective velocity of 0.9c
• final tune makes modest modification to this at
  near and far ends. In muo_util for next t/p
  release
• D0 Note 3950
• tune DT to position function by comparing to
  location of a-phi counter. Plot
• (positionPDT-positionScint) vs PositionScint
• Can also compare A segment to BC segment for
  side octants where PDTs have flipped
  orientation
• resolution varies from 20 to 40 cm

2
Central Muon Scanned Events

• Scanning of L1 mujet triggers by X. Song, V.
  Verma, M. Eads, A. Zatserklyaniy
• select junk and muon but then subdivide into
  mix if WAMUS/FAMUS, close if 2 segments near
  each other, mixclose, and good if simple
• all (but 1) WAMUS triggers. Possible cosmics but
  track pattern should still be recoed. Most are
  low momentum. None in oct 56
• file events found M
  T t02.04.00
• good (simple) 126 80(.63) 51(.40)
• only mix 48 21 6
• mix/close 26 11 8
• close 33 12
  8
• total good 233 124(.53) 73(.31)
• with latest p11.02h (RS segment selection,
  scint in fits) 158
  136
• .junk 76 3
  2 2
• files in /tmp_root/759/niu_1/verma/events_list