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The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM)

Authors :: Ade, P. A. R.
Anderson, C. J.
Barrentine, E. M.
Bellis, N. G.
Bolatto, A. D.
Breysse, P. C.
Bulcha, B. T.
Cataldo, G.
Connors, J. A.
Cursey, P. W.
Ehsan, N.
Grant, H. C.
Essinger-Hileman, T. M.
Hess, L. A.
Kimball, M. O.
Kogut, A. J.
Lamb, A. D.
Lowe, L. N.
Mauskopf, P. D.
McMahon, J.
Mirzaei, M.
Moseley, S. H.
Mugge-Durum, J. W.
Noroozian, O.
Pen, U.
Pullen, A. R.
Rodriguez, S.
Shirron, P. J.
Somerville, R. S.
Stevenson, T. R.
Switzer, E. R.
Tucker, C.
Visbal, E.
Volpert, C. G.
Wollack, E. J.
Yang, S.
Publication Year :: 2019
Abstract: The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a cryogenic balloon-borne instrument that will survey galaxy and star formation history over cosmological time scales. Rather than identifying individual objects, EXCLAIM will be a pathfinder to demonstrate an intensity mapping approach, which measures the cumulative redshifted line emission. EXCLAIM will operate at 420-540 GHz with a spectral resolution R=512 to measure the integrated CO and [CII] in redshift windows spanning 0 < z < 3.5. CO and [CII] line emissions are key tracers of the gas phases in the interstellar medium involved in star-formation processes. EXCLAIM will shed light on questions such as why the star formation rate declines at z < 2, despite continued clustering of the dark matter. The instrument will employ an array of six superconducting integrated grating-analog spectrometers (micro-spec) coupled to microwave kinetic inductance detectors (MKIDs). Here we present an overview of the EXCLAIM instrument design and status.<br />Comment: 10 pages, 4 figures