Helium cell: vertical Al cylinder. Wall 13 mil.
Optics target: a stack of nine 12C foils. Each is 10 mil thick,
with a density of about 2.2 g/cm3.
Dummy Targets: 10 cm, 15 cm.
Solid Targets attached at bottom: Lead (with cooling),
12C, Lead without cooling, BeO, Empty.
Can be changed to accommodate
It was built by Jefferson Lab with the help
from user groups, especially:
(CalStateLA, Kent, Maryland, ODU, W&M)
A little more detailed description is availabe in the cryotarget part of
the Hall A instrumentation NIM paper, which is under preparation now.
The draft version is available.
There is an annual status report on Activities in Hall A. The part on
the cryotarget update for the last three years are here:
Some cryotarget and dummy target information is available in a
technical note .
Back to cryotarget home page
Back to Hall A home page
Back to Jefferson Lab home page