scholarly journals Simulation of soil activation of gold-ions hitting a tungsten target at J7 of AGS

2010 ◽  
Author(s):  
K. Yip
Keyword(s):  
Tungsten Target ◽  
Soil Activation

scholarly journals Internal dose assessment of 148Gd using isotope ratios of gamma-emitting 146Gd or 153Gd in accidently released spallation target particles

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
C. Rääf ◽  
V. Barkauskas ◽  
K. Eriksson Stenström ◽  
C. Bernhardsson ◽  
H. B. L. Pettersson
Keyword(s):  
Operation Time ◽  
Isotope Ratios ◽  
Dose Assessment ◽  
Sensitive Indicator ◽  
Whole Body ◽  
Internal Dose ◽  
Tungsten Target ◽  
Alpha Emitter ◽  
Spallation Source ◽  
Effective Doses

AbstractThe pure alpha emitter 148Gd may have a significant radiological impact in terms of internal dose to exposed humans in case of accidental releases from a spallation source using a tungsten target, such as the one to be used in the European Spallation Source (ESS). In this work we aim to present an approach to indirectly estimate the whole-body burden of 148Gd and the associated committed effective dose in exposed humans, by means of high-resolution gamma spectrometry of the gamma-emitting radiogadolinium isotopes 146Gd and 153Gd that are accompanied by 148Gd generated from the operation of the tungsten target. Theoretical minimum detectable whole-body activity (MDA) and associated internal doses from 148Gd are calculated using a combination of existing biokinetic models and recent computer simulation studies on the generated isotope ratios of 146Gd/148Gd and 153Gd/148Gd in the ESS target. Of the two gamma-emitting gadolinium isotopes, 146Gd is initially the most sensitive indicator of the presence of 148Gd if whole-body counting is performed within a month after the release, using the twin photo peaks of 146Gd centered at 115.4 keV (MDA < 1 Bq for ingested 148Gd, and < 25 Bq for inhaled 148Gd). The corresponding minimum detectable committed effective doses will be less than 1 µSv for ingested 148Gd, but substantially higher for inhaled 148Gd (up to 0.3 mSv), depending on operation time of the target prior to the release. However, a few months after an atmospheric release, 153Gd becomes a much more sensitive indicator of body burdens of 148Gd, with a minimum detectable committed effective doses ranging from 18 to 77 µSv for chronic ingestion and between 0.65 to 2.7 mSv for acute inhalation in connection to the release. The main issue with this indirect method for 148Gd internal dose estimation, is whether the primary photon peaks from 146 and 153Gd can be detected undisturbed. Preliminary simulations show that nuclides such as 182Ta may potentially create perturbations that could impair this evaluation method, and which impact needs to be further studied in future safety assessments of accidental target releases.

scholarly journals Heating of tungsten target by intense pulse electron beam

2016 ◽  
Author(s):  
Yu. A. Trunev ◽  
A. S. Arakcheev ◽  
A. V. Burdakov ◽  
I. V. Kandaurov ◽  
A. A. Kasatov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Pulse Electron Beam ◽  
Pulse Electron ◽  
Tungsten Target

Plasma Formed by a Laser Pulse on a Tungsten Target

1966 ◽  
Vol 37 (13) ◽  
pp. 4962-4966 ◽  
Author(s):  
A. W. Ehler
Keyword(s):  
Laser Pulse ◽  
Tungsten Target

Thermal–hydraulic modeling and transient analysis of helium-cooled tungsten target coupled with ADS core

2016 ◽  
Vol 87 ◽  
pp. 612-620
Author(s):  
Tianji Peng ◽  
Zhiwei Zhou ◽  
Sicong Xiao ◽  
Xuanyu Sheng ◽  
Long Gu
Keyword(s):  
Transient Analysis ◽  
Hydraulic Modeling ◽  
Tungsten Target ◽  
Thermal Hydraulic Modeling

The Effect of X-Ray Spectra from Molybdenum and Tungsten Target Tubes on Image Quality in Mammography

Radiology ◽  
1976 ◽  
Vol 118 (3) ◽  
pp. 705-709 ◽  
Author(s):  
Arthur G. Haus ◽  
Charles E. Metz ◽  
John T. Chiles ◽  
Kurt Rossmann
Keyword(s):  
Image Quality ◽  
X Ray ◽  
Tungsten Target ◽  
And Tungsten

Characterization on deuterium retention in tungsten target using spatially resolved laser induced desorption-quadrupole mass spectroscopy

2021 ◽  
Vol 96 (12) ◽  
pp. 124040
Author(s):  
Yan Lyu ◽  
Cong Li ◽  
Ding Wu ◽  
Zhonglin He ◽  
Dongye Zhao ◽  
...  
Keyword(s):  
Mass Spectroscopy ◽  
Quadrupole Mass ◽  
Spatially Resolved ◽  
Tungsten Target ◽  
Deuterium Retention

scholarly journals Энерговыделение при бомбардировке атомами дейтерия поверхности вольфрама

2019 ◽  
Vol 45 (11) ◽  
pp. 51
Author(s):  
Д.С. Мелузова ◽  
П.Ю. Бабенко ◽  
М.И. Миронов ◽  
В.С. Михайлов ◽  
А.П. Шергин ◽  
...  
Keyword(s):  
Energy Loss ◽  
Energy Range ◽  
Energy Release ◽  
Maximum Energy ◽  
Wide Energy Range ◽  
Tokamak Reactor ◽  
Tungsten Target ◽  
Wide Energy ◽  
Bragg Maximum ◽  
Maximum Energy Release

The distribution of energy release (linear energy loss) over depth was calculated when bombarded with deuterium atoms of a tungsten target in a wide energy range of incident particles of 100 eV - 10 MeV. It is shown that in the energy range up to 100 keV, the maximum energy release, contrary to the prevailing ideas, is near the surface of a solid. At energies above 100 keV, the nature of the distribution changes and the Bragg maximum appears near the point where the particle stops. The distribution of the energy release over depth in tungsten is obtained for conditions typical of the ITER tokamak reactor, which makes it possible to estimate the wall heating during bombardment by plasma atoms.

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