Correlation Of X-ray Emission Research Articles

Correlation of x-ray emission with interferometry and neutron diagnostics at tungsten anode face and deuterium filling in plasma-focus discharge

In this paper, the influence of the tungsten evaporated from the anode on neutron production and soft x-ray radiation was studied on the base of x-ray, interferometry and neutron diagnostics performed on the plasma-focus PF-1000 device with deuterium as the filling gas at the current of 2 MA and neutron yield above 1010. In the axial center of the anode face the copper circuit plate was substituted with a tungsten one. During the pinch, the tungsten ions evaporated from the anode were transported into the plasma column. The differences in the filters used in the microchannel-plate detector X-frames and PIN detectors enabled separation of the bremsstrahlung emitted by the deuterium plasma from the recombination radiation of the tungsten ions produced in the region of the plasma column near the anode at the time of the evolution of instabilities. In comparison with the copper anode face, the neutron yield decreased to 40% and the energy of deuterons producing neutrons to 80%.

The correlation of x-ray emission with pinch energy in a 1.5 kJ plasma focus

Correlation of x-ray emission with pinch energy from a 1.5 kJ Mather-type plasma focus device for Ag and Sn inserts at the Cu tapered anode tip is reported. The space and time resolved x-ray emission characteristics are investigated by using a simple pinhole camera with appropriate filters and a multichannel pin-diode spectrometer. High voltage probe and Rogowski coil signals are used to estimate the pinch energy. At optimum conditions, the maximum x-ray yield in 4π-geometry is found to be 9 and 8 J/shot with efficiency of 0.6% and 0.5% for Sn and Ag inserted anodes. This is despite the fact that input energy converted to pinch energy is lower at 8% for Sn insert compared with 15% for the Ag insert. An increase in x-ray yield with an increase in pinch energy is observed for Sn as well as Ag. Pinhole images reveal that x-rays of energy less than 5 keV are emitted from the focus region and the high-energy x-rays are emanated from the anode tip.

The correlation of X-ray emission with strong millimeter activity in extragalactic sources

A sample of 25 strong extragalactic millimeter sources have been observed at about 1 keV with the Imaging Proportional Counter on the Einstein X-Ray Observatory and at 90 GHz with the NRAO 11 m telescope. A strong correlation between the millimeter and X-ray flux densities is found. This result is consistent with a synchronous self-Compton model in which the X-ray emission arises from the Compton scattering of millimeter radio photons off the relativistic electrons which created them.

The Correlation of Radio Emission and Optical Type with X-Ray Emission from Clusters of Galaxies

view Abstract Citations (36) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Correlation of Radio Emission and Optical Type with X-Ray Emission from Clusters of Galaxies Owen, Frazer N. Abstract A correlation of X-ray emission from clusters of galaxies with radio emission and with Rood and Sastry optical cluster type is reported. Of the 10 clusters with the highest known absolute X-ray luminosity, at least nine are strong radio sources. Also, eight of these 10 clusters are characterized by Rood and Sastry as containing one or two outstanding dominant galaxies. In light of these correlations the two most likely X-ray emission mechanisms-inverse Compton scattering and thermal bremsstrahlung-are discussed. Subject headings: galaxies, clusters of - radio sources - X-ray sources Publication: The Astrophysical Journal Pub Date: April 1974 DOI: 10.1086/181463 Bibcode: 1974ApJ...189L..55O full text sources ADS | data products SIMBAD (10)