Risacher, C., Guesten, R., Stutzki, J., Huebers, H. -W., Aladro, R., Bell, A., Buchbender, C., Buechel, D., Csengeri, T., Duran, C., Graf, U. U., Higgins, R. D., Honingh, C. E., Jacobs, K., Justen, M., Klein, B., Mertens, M., Okada, Y., Parikka, A., Puetz, P., Reyes, N., Richter, H., Ricken, O., Riquelme, D., Rothbart, N., Schneider, N., Simon, R., Wienold, M., Wiesemeyer, H., Ziebart, M., Fusco, P., Rosner, S. and Wohler, B. (2018). The upGREAT Dual Frequency Heterodyne Arrays for SOFIA. J. Astron. Instrum., 7 (4). SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD. ISSN 2251-1725

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Abstract

We present the performance of the upGREAT heterodyne array receivers on the SOFIA telescope after several years of operations. This instrument is a multi-pixel high resolution (R greater than or similar to 10(7)) spectrometer for the Stratospheric Observatory for Far-Infrared Astronomy (SOFIA). The receivers use 7-pixel subarrays configured in a hexagonal layout around a central pixel. The low frequency array receiver (LFA) has 2 x 7 pixels (dual polarization), and presently covers the 1.83-2.07 THz frequency range, which allows to observe the [CII] and [OI] lines at 158 mu m and 145 mu m wavelengths. The high frequency array (HFA) covers the [OI] line at 63 mu m and is equipped with one polarization at the moment (7 pixels, which can be upgraded in the near future with a second polarization array). The 4.7 THz array has successfully flown using two separate quantum-cascade laser local oscillators from two different groups. NASA completed the development, integration and testing of a dual-channel closed-cycle cryocooler system, with two independently operable He compressors, aboard SOFIA in early 2017 and since then, both arrays can be operated in parallel using a frequency separating dichroic mirror. This configuration is now the prime GREAT configuration and has been added to SOFIA's instrument suite since observing cycle 6.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Risacher, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guesten, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huebers, H. -W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aladro, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bell, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buchbender, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buechel, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csengeri, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duran, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Graf, U. U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Higgins, R. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Honingh, C. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacobs, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Justen, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klein, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mertens, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Okada, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parikka, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Puetz, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reyes, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Richter, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricken, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Riquelme, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rothbart, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schneider, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simon, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wienold, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wiesemeyer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ziebart, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fusco, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosner, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wohler, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-163104
DOI: 10.1142/S2251171718400147
Journal or Publication Title: J. Astron. Instrum.
Volume: 7
Number: 4
Date: 2018
Publisher: WORLD SCIENTIFIC PUBL CO PTE LTD
Place of Publication: SINGAPORE
ISSN: 2251-1725
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
QUANTUM-CASCADE LASERMultiple languages
Astronomy & AstrophysicsMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/16310

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