Model with beamed injection (
n
10
,
μ
,
Δμ
)
A beamed
injection:
Δθ
= 30
°
near vertical
incident angle,
μ
ο
= 0
into a low
density trap
n
= 4 ·10
9
cm
-3
a
t a scale of
τ
inj
= 32 s fits
the observed
microwave
spectra.