학술논문
Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)
Document Type
Working Paper
Author
Essinger-Hileman, Thomas; Oxholm, Trevor; Siebert, Gage; Ade, Peter; Anderson, Christopher; Barlis, Alyssa; Barrentine, Emily; Beeman, Jeffrey; Bellis, Nicholas; Breysse, Patrick; Bolatto, Alberto; Bulcha, Berhanu; Cataldo, Giuseppe; Connors, Jake; Cursey, Paul; Ehsan, Negar; Fernandez, Lee-Roger; Glenn, Jason; Golec, Joseph; Hays-Wehle, James; Hess, Larry; Jahromi, Amir; Kimball, Mark; Kogut, Alan; Lowe, Luke; Mauskopf, Philip; McMahon, Jeffrey; Mirzaei, Mona; Moseley, Harvey; Mugge-Durum, Jonas; Noroozian, Omid; Pen, Ue-Li; Pullen, Anthony; Rodriguez, Samelys; Shire, Konrad; Sinclair, Adrian; Somerville, Rachel; Stevenson, Thomas; Switzer, Eric; Timbie, Peter; Tucker, Carole; Visbal, Eli; Volpert, Carolyn; Wollack, Edward; Yang, Shengqi
Source
Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 11453-184 (13 December 2020)
Subject
Language
Abstract
This work describes the optical design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM). 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 will 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' full-width at half-maximum (FWHM) resolution at the center of the EXCLAIM band over a field of view of 22.5'. Illumination of the 1.7 K cold stop combined with blackened baffling at multiple places in the optical system ensures low (< -40 dB) edge illumination of the primary to minimize spill onto warmer elements at the top of the dewar.
Comment: 15 pages, 8 figures
Comment: 15 pages, 8 figures