  Electrons floating on the surface of superfluid helium have been suggested as
promising mobile spin quantum bits (qubits). Transferring electrons extremely
efficiently in a narrow channel structure with underlying gates has been
demonstrated, showing no transfer error while clocking $10^9$ pixels in a
3-phase charge coupled device (CCD). While on average, one electron per channel
was clocked, it is desirable to reliably obtain a single electron per channel.
We have designed an electron turnstile consisting of a narrow (0.8$\mu$m)
channel and narrow underlying gates (0.5$\mu$m) operating across seventy-eight
parallel channels. Initially, we find that more than one electron can be held
above the small gates. Underlying gates in the turnstile region allow us to
repeatedly split these electron packets. Results show a plateau in the electron
signal as a function of the applied gate voltages, indicating quantization of
the number of electrons per pixel, simultaneously across the seventy-eight
parallel channels.
