  The five-component profile of the 2.7-ms pulsar J0337+1715 appears to exhibit
the best example to date of a core/double-cone emission-beam structure in a
millisecond pulsar (MSP). Moreover, three other MSPs, the Binary Pulsar
B1913+16, B1953+29 and J1022+1001, seem to exhibit core/single-cone profiles.
These configurations are remarkable and important because it has not been clear
whether MSPs and slow pulsars exhibit similar emission-beam configurations,
given that they have considerably smaller magnetospheric sizes and magnetic
field strengths. MSPs thus provide an extreme context for studying pulsar radio
emission. Particle currents along the magnetic polar flux tube connect
processes just above the polar cap through the radio-emission region to the
light-cylinder and the external environment. In slow pulsars radio-emission
heights are typically about 500 km around where the magnetic field is nearly
dipolar, and estimates of the physical conditions there point to radiation
below the plasma frequency and emission from charged solitons by the curvature
process. We are able to estimate emission heights for the four MSPs and carry
out a similar estimation of physical conditions in their much lower emission
regions. We find strong evidence that MSPs also radiate by curvature emission
from charged solitons.
