LFI QM FEED HORNs CORRUGATION DATA

This technical note reports the corrugation data of the LFI Qualification Model of the Feed Horns. The scope is to deliver the data to LABEN in order to start the industrial activity about these horns according to the overall Planck/LFI QM development schedul

RCA_SPR Test Report on the 30 GHz RCA QM

Scope of this technical note is to report on the RCA_SPR test performed on the LFI 30 GHz RCA Qualification Model

SUMMARY OF THE EBB 30GHz OMT MEASURED PERFORMANCES

The scope of this technical note is to report briefly the results of the test campaign on the OMT EBB model for LFI at 30 GHz. Since the performances are degraded with respect the specifications, the impact on the overall system temperature and sensitivity has been evaluated using the LFI Microsoft Excel Spreadsheet 6.0

SWEPT SOURCE TEST: COUPLING MEASUREMENTS REPORT

This technical note reports the measurements performed at IASF – Bologna on 29th of Sept, regarding the coupling between the truncated waveguide and the sky horn in the RCA Swept Source Test setup (see [AD 2])

On a Class of Objective Prior from Scoring Rules

Objective prior distributions represent an important tool that allows one to have the advantages of using a Bayesian framework even when information about the parameters of a model is not available. The usual objective approaches work off the chosen statistical model and in the majority of cases the resulting prior is improper, which can pose limitations to a practical implementation, even when the complexity of the model is moderate. In this paper we propose to take a novel look at the construction of objective prior distributions, where the connection with a chosen sampling distribution model is removed. We explore the notion of defining objective prior distributions which allow one to have some degree of flexibility, in particular in exhibiting some desirable features, such as being proper, or log-concave, convex etc. The basic tool we use are proper scoring rules and the main result is a class of objective prior distributions that can be employed in scenarios where the usual model based priors fail, such as mixture models and model selection via Bayes factors. In addition, we show that the proposed class of priors is the result of minimising the information it contains, providing solid interpretation to the method

Vacuum squeezed light for atomic memories at the D2 cesium line

We report the experimental generation of squeezed light at 852 nm, locked on the Cesium D2 line. 50% of noise reduction down to 50 kHz has been obtained with a doubly resonant optical parametric oscillator operating below threshold, using a periodically-polled KTP crystal. This light is directly utilizable with Cesium atomic ensembles for quantum networking application

Comparison between tests and simulations on QM 30 GHz and 44 GHz feed horns

The purpose of this technical note is to show the comparison between the measured and simulated patterns of the feed horns at 30 and 44 GHz