Performance report on FEROS, the new fiber-linked echelle spectrograph at the ESO 1.52-m telescope

FEROS is a new fiber-fed bench-mounted prism-cross dispersed echelle spectrograph which has been recently commissioned at the ESO 1.52-m telescope at La Silla. The opto-mechanical concept and performance predictions have been presented by Kaufer and Pasquini. In this contribution we present the test results as obtained during two commissioning runs in October and December 1998. Special emphasis is given to the measured performance sin efficiency, spectral resolution, straylight contamination, and spectral stability. The definite highlight of the FEROS instrument performance is the high peak detection quantum efficiency of 17 percent at 550nm. These measured numbers include the 20mirror telescope, the fiber link, the instrument, and the detector while the whole wavelength range is covered by a single exposure on a thinned EEV 2k by 4k 15 micron pixel CCD and a constant resolving power of R equals 48.000. In addition the FEROS instrument proved its high spectral stability by radial-velocity observations as carried out on the known radial-velocity standard star (tau) Ceti over a time base of 2 months. By recording a calibration-lamp spectrum in parallel with the object spectrum and by the use of a simple cross-correlation technique, a rms of 21 m/s has been obtained for a data set of 130 individual measurements. FEROS has ben made available to the ESO community in January 1999

Commissioning FEROS, the new high-resolution spectrograph at La Silla.

On November 30, 1998, the second commissioning phase of the new Fiberfed Extended Range Optical Spectrograph (FEROS) was completed at the ESO 1.52-m telescope at La Silla. The instrument had been installed by a small team from the Heidelberg, Copenhagen and La Silla observatories starting in mid-September - just two years after the contract signature between the FEROS consortium and ESO. FEROS saw its first stellar light at the end of the installation phase on October 6th. An overview of the design and of the expected capabilities of the FEROS instrument has been presented in a previous paper [Kaufer et al., 1997, The Messenger 89, 1]; a more detailed description of the opto-mechanical design is found in [Kaufer & Pasquini, 1998, Proc, SPIE Vol. 3355, p. 844]. In the present article, the major technical results from the two commissioning phases which followed the first light event are reported

TRIUMF brown reports TRI-68-2

This report describes the conceptual building design and site layout for TRIUMF, considering the immediate requirement of constructing a workshop, laboratory and office building on the TRIUMF site as well as future expansion of the facility. Services, such as electrical, mechanical, cooling, etc., required for the cyclotron and ancillary equipment are described in some detail, as well as facilities for handling the heavy cyclotron components and radiation shielding blocks, and cost optimization studies were made. A survey of the various materials suitable for radiation shielding considering local availability and cost is included, and overall cost estimates for buildings and radiation shielding are provided.TRIUMFUnreviewedResearche