Information Hall A Cryogenic Target
Target A links:
  • Meeting Minutes
  • Target Status
  • Target Documentation
  • Target Drawings
  • Cryotarget Team



















    Links:

  • Hall C Cryotarget
  • EPICS
  • Hall A Home Page
  • Jefferson Lab

    • Three loops for liquid H2, D2 and one gasous target (3He or 4He)
      Initially LH2, LD2 and LD2 with collimator
      Each Target can handle beam heating up to 700 Watts
      Rastered beam up to 120 microAmps


    • LH2, LD2: each has 2 cells (15 cm, 4 cm)
      operation conditions: 20 K, 1.5 atm.

    • LH2/LD2 cell: horizontal Al cylinder.
      Upstream window is 2.8 mil thick, downstream window about
      4 mil, wall 13 mil. Cell diameter 2.5 inches.

    • 3He, 4He: one cell, 10 cm, 5 K, 15 atm.

    • Helium cell: vertical Al cylinder. Wall 13 mil.

    • Dummy Targets: 10cm, 15 cm and 4 cm.

    • Solid Targets attached at bottom: Raster, 12C, Al, BeO, Empty.

    • Beam power over 700 Watts. Luminosity is 5x1038 cm-2*sec-1

      A WORLD RECORD!

    • It is built by TJNAF with the help from user groups, especially:
      (CalStateLA, Kent, Maryland, ODU, W&M)


    These pages are maintained J.P.Chen last modified by Garrity July 1998
    jpchen@jlabs.gov