: Construction Schedule
: Beam and Dump Lines,
: Dump lines
The radiation budget due to the primary beam and photons was
estimated by the Jlab RADCON group and it is acceptable.
The scattered electrons bent by the Splitter magnet but not accepted
by the Enge Split-pole will hit the target chamber wall. This part of
electrons produced immeasurable radiation budget above hall background
due to E89-009 experiment, even during the period of using 2 A
beam. It is unable and inaccurate to make a direct scale up from the
background measurement for this experiment as beam current increased
to 30 A. A calculation and simulation will be performed after the
target chamber design is fixed. The calculation will show us whether additional local shielding
is needed to maintain the acceptable overall radiation budget.
This simulation aims also to estimate the effect of neutral background particles to the electron
Satoshi N. Nakamura