Backgrounds

1
Backgrounds

• Inelastic Rebounds
• Target Wall (aluminum)
• Magnetized Iron
• Also need

Need a field scan
Need dummy target runs
Need simulation near target
Event-mode runs (low current 50 nA)
2
Field Scan
3
Target Wall Backgrounds
A
Inel. Al
Elas. Al
QE Al
bgr
4
1
H
1
4
27
He
Al
QE
11 MeV
P
0 MeV
-39 MeV
1.6 (accept. /- 4)
4
Background Study in Event Data (HRS DAQ
counting mode)
Recent Data
(note wrong energy, wrong target)
From PRC paper
850 MeV
5
Simulations of the target, collimation, and
septa
( just getting started )
Strategy Geant4 ROOT
Target
Collim.
Septum