تقرير
The fiber-fed preslit of GIANO at T.N.G
| العنوان: | The fiber-fed preslit of GIANO at T.N.G |
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| المؤلفون: | Tozzi, A., Oliva, E., Origlia, L., Baffa, C., Biliotti, V., Falcini, G., Giani, E., Iuzzolino, M., Massi, F., Sanna, N., Scuderi, S., Sozzi, M. |
| سنة النشر: | 2014 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | Giano is a Cryogenic Spectrograph located in T.N.G. (Spain) and commisioned in 2013. It works in the range 950-2500 nm with a resolving power of 50000. This instrument was designed and built for direct feeding from the telescope [2]. However, due to constraints imposed on the telescope interfacing during the pre-commissioning phase, it had to be positioned on the rotating building, far from the telescope focus. Therefore, a new interface to the telescope, based on IR-transmitting ZBLAN fibers with 85\mu m core, was developed.Originally designed to work directly at the $f/11$ nasmyth focus of the telescope, in 2011 it has decided to use a fiber to feed it. The beam from the telescope is focused on a double fiber boundle by a Preslit Optical Bench attached to the Nasmith A interface of the telescope. This Optical Bench contains the fiber feeding system and other important features as a guiding system, a fiber viewer, a fiber feed calibration lamp and a nodding facility between the two fibers. The use of two fibers allow us to have in the echellogram two spectrograms side by side in the same acquisition: one of the star and the other of the sky or simultaneously to have the star and a calibration lamp. Before entering the cryostat the light from the fiber is collectd by a second Preslit Optical Bench attached directly to the Giano cryostat: on this bench the correct f-number to illuminate the cold stop is generated and on the same bench is placed an image slicer to increase the efficiency of the system. Comment: 21 pages, 24 figures, 3 tables. Presented at SPIE Astronomical Telescope + Instrumentation 2014 (Ground-based and Airbone Instrumentation for Astronomy 5, 9147-360). To be published in Proceeding of SPIE Volume 9147 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1117/12.2054094 |
| URL الوصول: | http://arxiv.org/abs/1407.3126 |
| رقم الأكسشن: | edsarx.1407.3126 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1117/12.2054094 |
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