  In early 2007, the New Horizons spacecraft flew through the Jovian
magnetosphere on the dusk side. Here, we present results from a novel means of
detecting energetic electrons along New Horizons' trajectory: the background
count rate of the Alice ultraviolet spectrograph. Electrons with energies >1
MeV can penetrate the thin aluminum housing of Alice, interact with the
microchannel plate detector, and produce a count that is indistinguishable from
an FUV photon. We present Alice data, proportional to the MeV electron flux,
from an 11-day period centered on the spacecraft's closest approach to Jupiter,
and compare it to electron data from the PEPSSI instrument. We find that a
solar wind compression event passed over the spacecraft just prior to it
entering the Jovian magnetosphere. Subsequently, the magnetopause boundary was
detected at a distance of 67 R_J suggesting a compressed magnetospheric
configuration. Three days later, when the spacecraft was 35-90 R_J downstream
of Jupiter, New Horizons observed a series of 15 current sheet crossings, all
of which occurred significantly northward of model predictions implying solar
wind influence over the middle and outer Jovian magnetosphere, even to radial
distances as small as ~35 R_J. In addition, we find the Jovian current sheet,
which had a half-thickness of at least 7.4 R_J between 1930 and 2100 LT
abruptly thinned to a thickness of ~3.4 R_J around 2200 LT.
