  The coherent coupling between a quartz electro-mechanical resonator at room
temperature and trapped ions in a 7-tesla Penning trap has been demonstrated
for the first time. The signals arising from the coupling remain for
integration times in the orders of seconds. From the measurements carried out,
we demonstrate that the coupling allows detecting the reduced-cyclotron
frequency ($\nu_+$) within times below 10~ms and with an improved resolution
compared to conventional electronic detection schemes. A resolving power
$\nu_+/\Delta \nu_+=2.4\times10^{7}$ has been reached in single measurements.
In this publication we present the first results, emphasizing the novel
features of the quartz resonator as fast non-destructive ion-trap detector
together with different ways to analyze the data and considering aspects like
precision, resolution and sensitivity.
