
TY  - JOUR
A1  - K Standish, Russell 
T1  - Non-hydrodynamic Contributions to the End Effects in Time of Flight Swarm Experiments
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1987
VL  - 40
IS  - 4
SP  - 519
EP  - 526
KW  - 
UR  - https://doi.org/10.1071/PH870519 
N2  - The hydrodynamic part of the distribution function of a swarm is separated from its nonhydrodynamic part using a projection operator, leading to an explicit expression for the timedependent transport coefficients. These are then related to a time of flight experiment. The contribution from non-hydrodynamic effects to the measured drift velocity is shown to be a power series in 11 d, where d is the drift length. A calculation based on an exactly soluble Fokker-Planck model shows that the correction to mobility measurements of lithium ions in helium due to non-hydrodynamic effects is of the same order of magnitude as those observed experimentally. 
ER  -

