Cosmology with the CBI
... • Works in spatial Fourier domain • Element-based errors vs. baseline-based signals • Limited by need to correlate pairs of elements ...
... • Works in spatial Fourier domain • Element-based errors vs. baseline-based signals • Limited by need to correlate pairs of elements ...
Erice 2015, Lecture 1: Polarization
... orthogonal linear polarization states work well over large wavelength range many different configurations calcite most often used in crystal-based polarizers because of large birefringence, low absorption in visible many other suitable materials Christoph U. Keller, Leiden University, [email protected] ...
... orthogonal linear polarization states work well over large wavelength range many different configurations calcite most often used in crystal-based polarizers because of large birefringence, low absorption in visible many other suitable materials Christoph U. Keller, Leiden University, [email protected] ...
Polarization of x-gamma radiation produced by a Thomson and
... measurements of the parity of the nuclear states, for the investigation of pygmy resonances and of the photodisintegration reactions. Measurements of the gamma polarization are usually done by analyzing the intensity spatial distribution detected on imaging plates [32]. Furthermore, the polarization ...
... measurements of the parity of the nuclear states, for the investigation of pygmy resonances and of the photodisintegration reactions. Measurements of the gamma polarization are usually done by analyzing the intensity spatial distribution detected on imaging plates [32]. Furthermore, the polarization ...
l000 first detection of polarized scattered light from an
... directly using the CHARA Array in the near-infrared H band and yielded for the planet 1.19 Ⳳ 0.08 RJ. The direct detection of the thermal emission with Spitzer using the secondary eclipse indicated a 16 mm brightness temperature of 1117 Ⳳ 42 K (Deming et al. 2006) for the radius estimated by Bouchy ...
... directly using the CHARA Array in the near-infrared H band and yielded for the planet 1.19 Ⳳ 0.08 RJ. The direct detection of the thermal emission with Spitzer using the secondary eclipse indicated a 16 mm brightness temperature of 1117 Ⳳ 42 K (Deming et al. 2006) for the radius estimated by Bouchy ...
292806
... beam without any externally applied magnetic field. The size of the magnetization reversal in that study was on the order of 20 microns due to the large optical spots that were utilized. To advance the areal density of hard disk drives beyond 1 Tbit/in.2, magnetization reversal areas much smaller th ...
... beam without any externally applied magnetic field. The size of the magnetization reversal in that study was on the order of 20 microns due to the large optical spots that were utilized. To advance the areal density of hard disk drives beyond 1 Tbit/in.2, magnetization reversal areas much smaller th ...
First detection of polarized scattered light from an exoplanetary
... orbit inclination i, longitude of the ascending node Ω, radius of the Lambert sphere RL , and constant shifts in Stokes parameters ∆q and ∆u, which can be present in the data due to interstellar or circumstellar polarization. In the case of transiting planets, the orbit inclination can also be deter ...
... orbit inclination i, longitude of the ascending node Ω, radius of the Lambert sphere RL , and constant shifts in Stokes parameters ∆q and ∆u, which can be present in the data due to interstellar or circumstellar polarization. In the case of transiting planets, the orbit inclination can also be deter ...
The Large-Scale Polarization Explorer (LSPE)
... extending our knowledge above 100 GHz. The main diffuse polarized emissions are synchrotron emission and thermal dust emission from non-spherical grains. Diffuse synchrotron emission is polarized around 10-20% on the average21, 22, the polarization of thermal dust is expected to be about 5% 23. Free ...
... extending our knowledge above 100 GHz. The main diffuse polarized emissions are synchrotron emission and thermal dust emission from non-spherical grains. Diffuse synchrotron emission is polarized around 10-20% on the average21, 22, the polarization of thermal dust is expected to be about 5% 23. Free ...
Electrically Driven Polarization Controller
... drifting, usually due to thermal effects, or low level seismic activity. The 100Hz response speed of the polarization controller is easily able to track such changes. For polarization scrambling applications, over 2000 polarization points were generated over a one second time frame, randomly scatter ...
... drifting, usually due to thermal effects, or low level seismic activity. The 100Hz response speed of the polarization controller is easily able to track such changes. For polarization scrambling applications, over 2000 polarization points were generated over a one second time frame, randomly scatter ...
SOFIA Polarimetry: Recent Musings
... Design principles: – goal of facility observing mode – switch from camera mode to polarization mode without opening cryostat – air worthiness approval – parallel development (JPL/Caltech?); outside HAWC critical path – integrate with HAWC after HAWC is ready for SOFIA ...
... Design principles: – goal of facility observing mode – switch from camera mode to polarization mode without opening cryostat – air worthiness approval – parallel development (JPL/Caltech?); outside HAWC critical path – integrate with HAWC after HAWC is ready for SOFIA ...
Document
... light. Optical polarization is a well-developed technique in the vapour phase[2], particularly for alkali atoms. Noble gases may be spin-exchange polarized using optically polarized alkalis[3] and these have many applications in surfaces physics[4, 5], biology[6] and quantum computation[7]. Optical ...
... light. Optical polarization is a well-developed technique in the vapour phase[2], particularly for alkali atoms. Noble gases may be spin-exchange polarized using optically polarized alkalis[3] and these have many applications in surfaces physics[4, 5], biology[6] and quantum computation[7]. Optical ...
Talk - IIT Kanpur
... The physical mechanism responsible for this is not known so far. We are considering the possibility that it may be explained due to conversion of photons into pseudoscalars due to propagation through local supercluster magnetic field. ...
... The physical mechanism responsible for this is not known so far. We are considering the possibility that it may be explained due to conversion of photons into pseudoscalars due to propagation through local supercluster magnetic field. ...
Radiative Processes in Astrophysics. Radio Polarization
... Faraday depolarization, etc. Higher m can be seen as the result of ‘repolarization’. ...
... Faraday depolarization, etc. Higher m can be seen as the result of ‘repolarization’. ...
Multidimensional and inhomogeneity effects on scattering
... unknown magnitude and the orientation of the magnetic field, one usually assumes that the emergent spectral line is formed by single scattering (optically thin regime) of the incident continuum radiation, or, in a bit more sophisticated approach, that the prominence behaves as a vertical, one-dimensi ...
... unknown magnitude and the orientation of the magnetic field, one usually assumes that the emergent spectral line is formed by single scattering (optically thin regime) of the incident continuum radiation, or, in a bit more sophisticated approach, that the prominence behaves as a vertical, one-dimensi ...
Polarization
... Figure 1 shows the general layout of the light source and detector. The laser diode, aperture, lens and first polarizer create a monochromatic, polarized test beam. The components to be tested are placed in one or more holders between the source polarizer and the detector. We will study the effects ...
... Figure 1 shows the general layout of the light source and detector. The laser diode, aperture, lens and first polarizer create a monochromatic, polarized test beam. The components to be tested are placed in one or more holders between the source polarizer and the detector. We will study the effects ...
PPTX
... distributed perpendicular to jet axis. • In other regions, the magnetic field are parallel to jet direction. • Radio and optical polarizations are different in bright knots. There are few optical polarization observations in the jet hot spots. ...
... distributed perpendicular to jet axis. • In other regions, the magnetic field are parallel to jet direction. • Radio and optical polarizations are different in bright knots. There are few optical polarization observations in the jet hot spots. ...
Circular Polarization in Star- Formation Regions
... star (and any other bright nearby sources) while allowing the scattered light to be seen with little obscuration. In a clumpy, dusty environment such as a star-formation region, such a geometry is feasible. The sign of CP seen by the protostellar material will depend on the scattering geometry. For ...
... star (and any other bright nearby sources) while allowing the scattered light to be seen with little obscuration. In a clumpy, dusty environment such as a star-formation region, such a geometry is feasible. The sign of CP seen by the protostellar material will depend on the scattering geometry. For ...
Probing Gravity with Observations of the Cosmic Microwave Background Sarah Church Stanford University
... Initial power spectrum of scalar modes and tensor modes (arise naturally from quantum fluctuations stretched out by inflation) Matter fluctuations begin to collapse as they enter the horizon Gravity + radiation pressure couple the baryons and the photon background ⇒ oscillations in the photon-baryon ...
... Initial power spectrum of scalar modes and tensor modes (arise naturally from quantum fluctuations stretched out by inflation) Matter fluctuations begin to collapse as they enter the horizon Gravity + radiation pressure couple the baryons and the photon background ⇒ oscillations in the photon-baryon ...
arXiv:1704.06630v1 [gr-qc] 21 Apr 2017
... types of exact solutions of static thin disks [3–9], and stationary thin disks [10, 11], whereas the stability of this systems was studied in [12] using a first order perturbation on the energymomentum tensor. On the other hand, due to the high relevance of electromagnetic fields in general relativi ...
... types of exact solutions of static thin disks [3–9], and stationary thin disks [10, 11], whereas the stability of this systems was studied in [12] using a first order perturbation on the energymomentum tensor. On the other hand, due to the high relevance of electromagnetic fields in general relativi ...
X-ray polarimetry in Xenon gas filled detectors
... including 1st order non-dipole corrections δ and γ to the dipole approximation (θ is the polar angle relative to the x-ray propagation direction, θ and φ are the polar and azimuthal angles relative to the polarization direction, β is the dipole asymmetry parameter and P2 is the 2nd Legendre polynomi ...
... including 1st order non-dipole corrections δ and γ to the dipole approximation (θ is the polar angle relative to the x-ray propagation direction, θ and φ are the polar and azimuthal angles relative to the polarization direction, β is the dipole asymmetry parameter and P2 is the 2nd Legendre polynomi ...
Investigation of the Earth Ionosphere using the Radio Emission of
... amplitude in the array matched its radio frequency, see Equation (1) below; (3) The second amplitude array B0 (k), which had a similar distribution but different standard deviation (σ2 ), was consistent with the orthogonal (relative to the first array) linearly polarized component of the radiation o ...
... amplitude in the array matched its radio frequency, see Equation (1) below; (3) The second amplitude array B0 (k), which had a similar distribution but different standard deviation (σ2 ), was consistent with the orthogonal (relative to the first array) linearly polarized component of the radiation o ...
McConnell XGPolarimetry SSE
... At the subatomic level all radiation processes that produce X-rays or γ-rays are inherently polarized and anisotropic. However, by symmetry, the total emission from any homogeneous and isotropic source will be isotropic and unpolarized. Most astrophysical X-ray/γ-ray sources are expected to have som ...
... At the subatomic level all radiation processes that produce X-rays or γ-rays are inherently polarized and anisotropic. However, by symmetry, the total emission from any homogeneous and isotropic source will be isotropic and unpolarized. Most astrophysical X-ray/γ-ray sources are expected to have som ...
Polarization (waves)
Polarization (also polarisation) is a property of waves that can oscillate with more than one orientation. Electromagnetic waves such as light exhibit polarization, as do some other types of wave, such as gravitational waves. Sound waves in a gas or liquid do not exhibit polarization, since the oscillation is always in the direction the wave travels.In an electromagnetic wave, both the electric field and magnetic field are oscillating but in different directions; by convention the ""polarization"" of light refers to the polarization of the electric field. Light which can be approximated as a plane wave in free space or in an isotropic medium propagates as a transverse wave—both the electric and magnetic fields are perpendicular to the wave's direction of travel. The oscillation of these fields may be in a single direction (linear polarization), or the field may rotate at the optical frequency (circular or elliptical polarization). In that case the direction of the fields' rotation, and thus the specified polarization, may be either clockwise or counter clockwise; this is referred to as the wave's chirality or handedness.The most common optical materials (such as glass) are isotropic and simply preserve the polarization of a wave but do not differentiate between polarization states. However, there are important classes of materials classified as birefringent or optically active in which this is not the case and a wave's polarization will generally be modified or will affect propagation through it. A polarizer is an optical filter that transmits only one polarization.Polarization is an important parameter in areas of science dealing with transverse wave propagation, such as optics, seismology, radio, and microwaves. Especially impacted are technologies such as lasers, wireless and optical fiber telecommunications, and radar.