2n BKG data

$I_{e^-} = 30 mA$, $Pw=20 ns$, $R=300Hz$, $E_{e^-}=10.5 MeV$

Upstream collimator diamater = 0.25"

Downstream collimator diamater = 2.0"

2 Al sheets as bremsstrahlung radiator;

Detector G: HV(G1) = -1700 V, HV(G2) = -1650 V.

There was 2" of lead in front of the Det G.