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{\bf {\LARGE
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CAFE: Calar Alto Fiber-fed Echelle spectrograph
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S. F. S\'anchez$^{1}$, 
J. Aceituno$^{1}$,
U. Thiele$^{1}$,
F. Grupp$^{2}$,
S. Dreizler$^{3}$,
J. Bean$^{3}$, and
D. Benitez$^{1}$
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$^{1}$
 Centro Astron\'omico Hispano Alem\'an, Calar Alto, (CSIC-MPG),
   C/Jes\'us Durb\'an Rem\'on 2-2, E-04004 Almeria, Spain\\
$^{2}$
Universit\"ats-Sternwarte M\"unchen\\
$^{3}$
University of G\"ottingen\\
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CAFE spectrograph
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S. F. S\'anchez et al.
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\section*{Abstract}{\small
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The Calar Alto Fiber-fed Echelle spectrograph (CAFE) is an instrument under
construction at CAHA to replace FOCES, the high-resolution echelle
spectrograph at the 2.2 m telescope of the observatory. FOCES is a property of
the Observatory of the Munich University, and it was recalled it from Calar Alto
in 2009. The instrument comprised a substantial fraction of the
telescope time during its operational life-time, and it is due to that it was
taken the decision to build a replacement.
CAFE shares its basic characteristics with those of FOCES. However, significant
improvements have been introduced in the original design, the quality of the
materials, and the overall stability of the system. In particular: (i) a new
calibration Iodine cell is foreseen to operate together with the standard ThAr
lamps; (ii) the optical quality of all the components has been selected to be
$\lambda/20$, instead of the original $\lambda/10$; (iii) an isolated room has
been selected to place the instrument, termalized and stabilized against
vibrations (extensive tests have been performed to grant the stability); (iv)
most of the mobile parts in FOCES has been substituted by fixed elements, to
increase the stability of the system; and finally (v) a new more efficient
CCD, with a smaller pixel has been acquired.  It is expected that the overall
efficiency and the quality of the data will be significantly improved with
respect to its precesor. In particular, CAFE is design and built to achieve
resolutions of $R\sim70000$, which will be kept in the final acquired data,
allowing it to compete with current operational extrasolar planets hunters.
After two years of work all the components are in place. The instrument is now
finally assembled, and we are performing the the first alignment tests. It is
expected that the commissioning on the laboratory will finish at the end of
2010, followed by the commissioning on telescope along the first semester of
2011. If everything goes well, we will offer the instrument in a shared-risk
mode for the second semester of 2011.

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