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Communication Dans Un Congrès Année : 2016

Future CMB polarization observatory in the presence of foregrounds and gravitational lensing: the Simons Array

Résumé

We present a new forecasting method for future CMB instruments, as well as an overview of the design and status of the Simons Array experiment. CMB4cast is a new code allowing the CMB community to estimate the scientific performance of a given instrumental design in the presence of astrophysical foregrounds and gravitational lensing. The Simons Array is a CMB polarimetry experiment which aims at characterizing the arcminute angular scale B-mode signal from weak gravitational lensing and search for the degree angular scale B-mode signal from inflationary gravitational waves. It is composed of three receivers observing at 95, 150, 220 and 280GHz, each of them having a 365 mm diameter focal plane cooled to 270 milli-Kelvin. The entire array has 22,764 polarization sensitive Transition Edge Sensor (TES) detectors, associated with lenslet-antenna coupled pixels that are sensitive to two frequency bands simultaneously. The first receiver, named Polarbear-2, will deploy in 2016 in the Atacama desert in Chile. The Simons Array will achieve first light in 2018 and will be able to constrain tensor-to-scalar ratio to σ(r = 0.1) = 6 × $10^{−3}$ , and the sum of neutrino masses to ($\sum m_v$)= 40 meV when combined with spectroscopic galaxy surveys.
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Dates et versions

hal-03623029 , version 1 (29-03-2022)

Identifiants

  • HAL Id : hal-03623029 , version 1
  • INSPIRE : 1589746

Citer

Josquin Errard. Future CMB polarization observatory in the presence of foregrounds and gravitational lensing: the Simons Array. 51st Rencontres de Moriond on Cosmology, Mar 2016, La Thuile, Italy. pp.43-46. ⟨hal-03623029⟩
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