  Trapped atomic ions find wide applications ranging from precision measurement
to quantum information science and quantum computing. Among the different
atomic species employed, beryllium ions are widely used due to its light mass
and convenient atomic structure. However, the ion loading process requires a
high temperature for sufficient vapor pressure, generating undesirable gas load
for the background vacuum and limiting the lifetime of a long ion chain. Here,
we demonstrate a simple method to rapidly produce pure linear chains of
beryllium ions with pulsed laser ablation, serving as a starting point for
large-scale quantum information processing. Our method is fast compared to
thermal ovens; reduces the vacuum load to only 10^(-12) Torr level; yields a
short recovery time of a few seconds; and also eliminates the need for a deep
ultraviolet laser for photo-ionization. In addition, we apply feedback control
to obtain defect-free ion arrays with desirable lengths.
