Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)
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arXiv
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| Natura: | Preprint |
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2020
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| _version_ | 1866913608307310592 |
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| author | Essinger-Hileman, Thomas Chmaytelli, Danny Oxholm, Trevor Parekh, Tatsat Siebert, Gage Switzer, Eric R. Barlis, Alyssa Barrentine, Emily M. Beeman, Jeffrey Chung, Christine Cursey, Paul Dahal, Sumit Datta, Rahul Ehsan, Negar Glenn, Jason Golec, Joseph Lennon, Andrew Lowe, Luke N. McMahon, Jeffrey Rahmani, Maryam Timbie, Peter Tretheway, Bruce Tucker, Carole Volpert, Carolyn Watson, Joseph Wollack, Edward J. |
| author_facet | Essinger-Hileman, Thomas Chmaytelli, Danny Oxholm, Trevor Parekh, Tatsat Siebert, Gage Switzer, Eric R. Barlis, Alyssa Barrentine, Emily M. Beeman, Jeffrey Chung, Christine Cursey, Paul Dahal, Sumit Datta, Rahul Ehsan, Negar Glenn, Jason Golec, Joseph Lennon, Andrew Lowe, Luke N. McMahon, Jeffrey Rahmani, Maryam Timbie, Peter Tretheway, Bruce Tucker, Carole Volpert, Carolyn Watson, Joseph Wollack, Edward J. |
| contents | This work describes the design and implementation of optics for EXCLAIM, the EXperiment for Cryogenic Large-Aperture Intensity Mapping. EXCLAIM is a balloon-borne telescope that will measure integrated line emission from carbon monoxide (CO) at redshifts $z<1$ and ionized carbon ([CII]) at redshifts $z = 2.5-3.5$ to probe star formation over cosmic time in cross-correlation with galaxy redshift surveys. The EXCLAIM instrument is designed to observe at frequencies of $420$--$540$ GHz using six microfabricated silicon integrated spectrometers with spectral resolving power $R = 512$ coupled to kinetic inductance detectors (KIDs). A completely cryogenic telescope cooled to a temperature below 5~K provides low-background observations between narrow atmospheric lines in the stratosphere. Off-axis reflective optics use a $90$-cm primary mirror to provide $4.2^\prime$ full-width at half-maximum (FWHM) resolution at the center of the EXCLAIM band over a field of view of $22.5^\prime$. Illumination of the $1.7$ K cold stop combined with blackened baffling at multiple places in the optical system ensure low ($< -40$ dB) edge illumination of the primary to minimize spill onto warmer elements at the top of the dewar. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2012_10481 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) Essinger-Hileman, Thomas Chmaytelli, Danny Oxholm, Trevor Parekh, Tatsat Siebert, Gage Switzer, Eric R. Barlis, Alyssa Barrentine, Emily M. Beeman, Jeffrey Chung, Christine Cursey, Paul Dahal, Sumit Datta, Rahul Ehsan, Negar Glenn, Jason Golec, Joseph Lennon, Andrew Lowe, Luke N. McMahon, Jeffrey Rahmani, Maryam Timbie, Peter Tretheway, Bruce Tucker, Carole Volpert, Carolyn Watson, Joseph Wollack, Edward J. Instrumentation and Methods for Astrophysics This work describes the design and implementation of optics for EXCLAIM, the EXperiment for Cryogenic Large-Aperture Intensity Mapping. EXCLAIM is a balloon-borne telescope that will measure integrated line emission from carbon monoxide (CO) at redshifts $z<1$ and ionized carbon ([CII]) at redshifts $z = 2.5-3.5$ to probe star formation over cosmic time in cross-correlation with galaxy redshift surveys. The EXCLAIM instrument is designed to observe at frequencies of $420$--$540$ GHz using six microfabricated silicon integrated spectrometers with spectral resolving power $R = 512$ coupled to kinetic inductance detectors (KIDs). A completely cryogenic telescope cooled to a temperature below 5~K provides low-background observations between narrow atmospheric lines in the stratosphere. Off-axis reflective optics use a $90$-cm primary mirror to provide $4.2^\prime$ full-width at half-maximum (FWHM) resolution at the center of the EXCLAIM band over a field of view of $22.5^\prime$. Illumination of the $1.7$ K cold stop combined with blackened baffling at multiple places in the optical system ensure low ($< -40$ dB) edge illumination of the primary to minimize spill onto warmer elements at the top of the dewar. |
| title | Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2012.10481 |