Preliminary scanning strategy analysis for the LSPE-STRIP instrument

Incardona, F.; Benetti, Marco; Bersanelli, M.; Franceschet, C.; Maino, D.; Mennella, A.; Realini, S.; Tomasi, M.

doi:10.1117/12.2315005

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…Current high sensitivity observations are mainly oriented to the high frequencies with high sensitivity low frequency observations limited to large angular scales where the Faraday signal is lower. For this reason current Faraday constraints are not competitive with other effects being in the rage of hundreds of nGauss [80,136,137], but Faraday rotation represents a very good target for future ground based observatories like the QUIJOTE and STRIP experiments [138,139] with a good potential also for small scale experiments on higher frequencies thanks to the very high sensitivities [140] but all must first account for decontamination from the Galactic Faraday rotation which currently sits at the 10 nG level [141], with lower levels near the galactic poles [142].…”

Section: Jcap11(2019)028mentioning

confidence: 99%

Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments

Paoletti

Finelli⋆

2019

J. Cosmol. Astropart. Phys.

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We present the constraints on the amplitude of magnetic fields generated prior to the recombination using CMB temperature and polarization anisotropy data from Planck 2018 release, alone and in combination with those from BICEP2/Keck array and the South Pole Telescope. We model the fields with a generic parametrization and we make no assumptions on their origin in order to provide general constraints on their characteristics. The analysis updates the former corresponding Planck 2015 results both on data and numerical implementation. We then perform forecasts for the next generation of CMB experiments such as LiteBIRD satellite alone and in combination with future ground based experiments.

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Section: Jcap11(2019)028mentioning

confidence: 99%

Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments

Paoletti

Finelli⋆

2019

J. Cosmol. Astropart. Phys.

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“…The optical assembly, constituted by the two mirrors, the baffle and the detectors, is installed on top of an alt-azimuth mount, which allows the rotation of the telescope around two perpendicular axes, allowing us to change the azimuth and elevation angle. An integrated rotary joint will transmit power and data to the telescope and the instrument, and it will enable a continuous spin around the vertical axis as required by the scanning strategy [6]. Figure 1 shows a general view of the Strip telescope.…”

Section: Optical Configurationmentioning

confidence: 99%

The LSPE-Strip beams

Realini¹,

Franceschet²,

Villa³

et al. 2022

J. Inst.

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In this paper we describe the design and characterization of the optical system of LSPE/Strip, a coherent polarimeter array that will observe the microwave sky from the Teide Observatory in Tenerife in two frequency bands centred at 43 and 95 GHz through a dual-reflector crossed-Dragone telescope of 1.5 m aperture. In general, optical systems composed by a telescope-feed array assembly have non-idealities that might limit their ability to perform high-precision measurements. It is thus necessary to understand, characterize and properly control these systematic effects. For this reason, we performed electromagnetic simulations to characterize angular resolution, sidelobes, main beam symmetry, polarization purity and feedhorns orientation. The results presented in this paper will be an essential input for further optical studies and for the LSPE/Strip data analysis. Ultimately, they will be used to assess the impact of optical systematic effects on the scientific results.

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“…x y S c r k j l R I j X A S k y f y Q l 6 t x H q 2 3 q z 3 W W v G m s 8 c k j + w P n 4 A a 4 + U / A = = < / l a t e x i t > < l a t e x i t s h a 1 _ b a s e 6 precise value depending on the choice of the launching station and effective trajectory. The sky fraction observed by LSPE-Strip can be adjusted by changing the telescope zenith angle [30], resulting in different sensitivity per sky pixel at the end of the survey. The final Strip strategy will be defined to trade-off the sky coverage with the noise per pixel distribution and to maximize the overlap between the sky regions observed by the two LSPE instruments.…”

Section: Observation Strategy and Sky Coveragementioning

confidence: 99%

The large scale polarization explorer (LSPE) for CMB measurements: performance forecast

Addamo

Ade

Baccigalupi

et al. 2021

J. Cosmol. Astropart. Phys.

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The measurement of the polarization of the Cosmic Microwave Background (CMB) radiation is one of the current frontiers in cosmology. In particular, the detection of the primordial divergence-free component of the polarization field, the B-mode, could reveal the presence of gravitational waves in the early Universe. The detection of such a component is at the moment the most promising technique to probe the inflationary theory describing the very early evolution of the Universe. We present the updated performance forecast of the Large Scale Polarization Explorer (LSPE), a program dedicated to the measurement of the CMB polarization. LSPE is composed of two instruments: LSPE-Strip, a radiometer-based telescope on the ground in Tenerife-Teide observatory, and LSPE-SWIPE (Short-Wavelength Instrument for the Polarization Explorer) a bolometer-based instrument designed to fly on a winter arctic stratospheric long-duration balloon. The program is among the few dedicated to observation of the Northern Hemisphere, while most of the international effort is focused into ground-based observation in the Southern Hemisphere. Measurements are currently scheduled in Winter 2022/23 for LSPE-SWIPE, with a flight duration up to 15 days, and in Summer 2022 with two years observations for LSPE-Strip. We describe the main features of the two instruments, identifying the most critical aspects of the design, in terms of impact on the performance forecast. We estimate the expected sensitivity of each instrument and propagate their combined observing power to the sensitivity to cosmological parameters, including the effect of scanning strategy, component separation, residual foregrounds and partial sky coverage. We also set requirements on the control of the most critical systematic effects and describe techniques to mitigate their impact. LSPE will reach a sensitivity in tensor-to-scalar ratio of σ r < 0.01, set an upper limit r < 0.015 at 95% confidence level, and improve constraints on other cosmological parameters.

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Preliminary scanning strategy analysis for the LSPE-STRIP instrument

Cited by 8 publications

References 8 publications

Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments

Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments

The LSPE-Strip beams

The large scale polarization explorer (LSPE) for CMB measurements: performance forecast

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