  The performance of accelerators profits from phase space tailoring by
coupling of planes. The previously applied techniques swap the emittances among
the three planes but the set of available emittances is fixed. In contrast to
these emittance exchange scenarios the emittance transfer scenario presented
here allows for arbitrarily changing the set of emittances as long as the
product of the emittances is preserved. This letter is on the first
experimental demonstration of transverse emittance transfer along an ion beam
line. The amount of transfer is chosen by setting just one single magnetic
field value. The envelope-functions (beta) and -slopes (alpha) of the finally
uncorrelated and re-partitioned beam at the exit of the transfer line do not
depend on the amount of transfer.
