Hrrl pos jul2012 shieldings

Effects of Iron shielding on the dipole

Shieldings:

2" thick brick with 2" diameter hole placed at the exit of the vacuum window, then NaI detectors were placed next to the brick. The distance between NaI detector and the edge of the 6-way cross is

Detector Left:

Detector Right:

There is 2" thick Pb brick with 2" diameter hole to act as collimator.

Dipole mappings in the center region: https://wiki.iac.isu.edu/index.php/Kiwi_Dipole_Mappings#Rotation

Magnetic field at the edge (the side has shielding next to it) of the dipole was measured using Dr. Dale's probe. Measurement were done 3 points, they located at the center and two sides.

            B-field (Gauss)
           A         B        C
6  Amps   -15      -45        -35       
15 Amps   -47.5    -113       -70.5
21 Amps   -55      -156       -79