  We propose methods to produce energetic meson beams such as charged and
neutral Kaons, which are boosted to be collimated and with relatively long life
time. The first type of methods is based on asymmetric electron positron
collisions with a center of mass energy of, e.g., 1020 MeV, and Kaons can be
produced at a rate of $10^{4-5}/s$. The electron and positron beams are either
asymmetric in energy, e.g., 10 GeV electron beam with 26 MeV positron beam, or
asymmetric in space, e.g., 10 GeV electron and positron beams collisions
separated with a angle around 0.05 radius. Such proposals should be able to be
achieved with a reasonable budget. The other type of method is relying on TeV
positron on target experiment, where Kaon beams can be achieved at around
$10^{7}$ per bunch crossing. Such Kaon beams are clean with small
contamination, and can have great physics potential on, e.g., hyperon searches
through Kaon nuclei collision, Kaon rare decay measurement, and Kaon proton or
Kaon lepton collisions. The same technique with very asymmetric electron
positron collisions can also be extended to other final states such as pions
and tau leptons.
