Effusive Atomic Oven Nozzle Design Using an Aligned Microcapillary Array
  We present a simple and inexpensive design for a multichannel effusive oven nozzle which provides improved atomic beam collimation and thus extended oven lifetimes. Using this design we demonstrate an atomic lithium source suitable for trapped-atom experiments. At a nozzle temperature of 525$^{\circ}$C the collimated atomic beam flux directly after the nozzle is $1.2 \times 10^{14}$ atoms per second with a peak beam intensity greater than $5.0 \times 10^{16}$ atoms per second per steradian. This suggests an oven lifetime of several decades of continuous operation. 
Ruwan Senaratne, Shankari V. Rajagopal, Zachary A. Geiger, Kurt M.   Fujiwara, Vyacheslav Lebedev, and David M. Weld
physics.atom-ph cond-mat.quant-gas