We derive expressions for the total and linearly-polarized synchrotron emissivity of an element of plasma containing relativistic particles and disordered magnetic field which has been sheared or compressed along three independent directions. Our treatment follows that given by Matthews & Scheuer (1990) in the special case of a power-law electron energy spectrum. We show that the emissivity int...

The emission from the vegetation canopy depends on the type of vegetation and the frequencies at which the emission is measured. For studying the vegetation canopy of a tree, the dielectric constant of its constituent is measured at microwave frequencies. In this study the dielectric constant is measured using waveguide cell method and its scattering coefficient is estimated using perturbation ...

A high temperature oil-bath-based-black-body source has been designed and constructed in the Radiometric Physics Division at the National Institute of Standards and Technology, Gaithersburg, MD. The goal of this work was to design a large aperture blackbody source with highly uniform radiance across the aperture, good temporal stability, and good reproducibility. This blackbody source operates ...

A third generation water bath based black-body source has been designed and constructed in the Radiometric Physics Division at the National Institute of Standards and Technology, Gaithersburg, MD. The goal of this work was to design a large aperture blackbody source with improved temporal stability and reproducibility compared with earlier designs, as well as improved ease of use. These blackbo...

We explore the possible application of linear covariance-based (LCB) filtering to line-intensity mapping (LIM) signal reconstructions. Originally introduced for reconstruction integrated Sachs-Wolfe effect in cosmic microwave background, LCB filter is an optimal map estimator that extends simple Wiener by leveraging external correlated data. Given a detectable strong LIM-galaxy or LIM-LIM cross...

Passive microwave radiometers have been operated on an aircraft over the same (N OPEX) area of Sweden, near Uppsala in September 1995 and March 1907. Their measurements have allowed the calculation of the emissivity of boreal forest and agricultural land surfaces at 24, 50, 89 and 157 GHz over a range of incidence angles and polarisations. These results show consistent differences between dense...

A formal implementation of the Fowler-Nodheim equation to emission characteristics of diamond coated cold cathodes gives values of the work function which depend on surface curvature of the coating, thus making it incorrect. Experiments with diamond coated Si tips having different coating radii have shown, that their emissivity depends on the radius of the Si tip rather than on the radius of th...

Dense matter in compact stars cools efficiently by neutrino emission via the direct Urca processes n → p + e + ν̄e and p + e → n + νe. Below the pairing phase transition temperature Tc these processes are suppressed at asymptotically low temperatures exponentially. We compute the emissivity of the Urca process at one loop for temperatures T ≤ Tc, in the case where the baryons are paired in the S...

The aim of this paper is to validate a set of methods to model the measured neutron emission on Mega Amp Spherical Tokamak (MAST) using TRANSP. Neutrons are measured along a set of collimated lines of sight (LoS) at MAST by a Neutron Camera (NC). The neutron emissivity is modeled with TRANSP [1] for different plasma discharges using a selfconsistent data set produced by a data preparation and a...