X-RAYS EMISSION OF HYDROGEN-LIKE AND HELIUM-LIKE ARGON IN INTERACTION WITH Mo METALLIC SURFACE

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2433-2437
Author(s):  
Z. H. YANG ◽  
X. M. CHEN ◽  
Y. P. ZHANG ◽  
A. X. ZHANG ◽  
Y. T. ZHAO ◽  
...  
Keyword(s):  
Electron Cyclotron Resonance ◽  
National Laboratory ◽  
Heavy Ion ◽  
Ion Source ◽  
Metallic Surface ◽  
X Rays ◽  
Research Facility ◽  
X Ray ◽  
First Time ◽  
Charged Ions

14-GHz electron cyclotron resonance ion source (ECRIS) at the Heavy Ion Research Facility National Laboratory in Lanzhou has been used to investigate the radiative deexcitation of highly charged Ar 17+ and Ar 16+ ions as they interact with a molybdenum surface. The interaction of Ar 17+ and Ar 16+ ions above Mo Metallic Surface has been studied by looking at the X-rays with a Si ( Li ) detector. ECRIS is used in our work for the first time. As the experimental results, the X-ray spectra of Ar 17+ and Ar 16+ ions interacting with a Mo metal target have been given. The capture of many electrons by Ar 17+ and Ar 16+ ions, at low velocities, near a metallic surface, has been studied. Hollow atoms produced in the interaction of highly charged ions with a Mo metallic surface have been observed.

X-Ray Spectra of Hydrogen-Like and Helium-Like Argon Ions on Solid Surfaces

2007 ◽  
Vol 121-123 ◽  
pp. 995-998
Author(s):  
Z.H. Yang ◽  
X.M. Chen ◽  
Y.P. Zhang ◽  
X.A. Zhang ◽  
Y.T. Zhao ◽  
...  
Keyword(s):  
Electron Cyclotron Resonance ◽  
National Laboratory ◽  
Heavy Ion ◽  
Ion Source ◽  
Solid Surfaces ◽  
X Rays ◽  
Metallic Surfaces ◽  
X Ray ◽  
Wide Range ◽  
Characteristic Features

14-GHz electron cyclotron resonance ion source at the Heavy Ion Research Facility National Laboratory in Lanzhou has been used to investigate x-rays from the interaction of slow highly charged Ar17+and Ar16+ions for different energies with Be, Al, Ni, Mo and Au surfaces. Interaction of Ar17+ and Ar16+ ions with Metallic Surfaces for a wide range of energies has been studied by measuring the resulting x-ray emission. The characteristic features of the x-ray spectra have been explained.

scholarly journals X-ray emission induced by 1.2–3.6 MeV Kr13+ ions

2012 ◽  
Vol 30 (4) ◽  
pp. 665-670 ◽  
Author(s):  
Cexiang Mei ◽  
Yongtao Zhao ◽  
Xiaoan Zhang ◽  
Jieru Ren ◽  
Xianming Zhou ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Cross Section ◽  
Electron Cyclotron Resonance ◽  
Production Cross ◽  
Heavy Ion ◽  
Ion Source ◽  
X Rays ◽  
X Ray ◽  
Binary Encounter Approximation ◽  
The Relationship

AbstractX-ray emission from Kr13+ ions in the energy range 1.2–3.6 MeV in steps of 0.6 MeV impacting on an Au target was investigated on electron cyclotron resonance ion source at the Heavy Ion Research Facility in Lanzhou. It was found that a shift of the X-ray lines to the higher energy side occurred. We measured the relationship between the characteristic of X-ray yield of Au M X-rays and Kr L X-rays as a function of incident energy. Furthermore, M-shell X-ray production cross-section of Au induced by Kr13+ was measured. The measured cross-section of target is compared to the classical binary-encounter approximation and plane-wave-born approximation theoretical model, which is a significant different between experimental and theoretical model.

scholarly journals X-ray emission of Xe30+ ion beam impacting on Au target

2011 ◽  
Vol 29 (2) ◽  
pp. 265-268 ◽  
Author(s):  
Xiaoan Zhang ◽  
Yongtao Zhao ◽  
Dieter H.H. Hoffmann ◽  
Zhihu Yang ◽  
Ximeng Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Kinetic Energy ◽  
Ion Beam ◽  
Rydberg States ◽  
Heavy Ion ◽  
X Rays ◽  
Research Facility ◽  
X Ray ◽  
Charged Ions ◽  
Very High

AbstractX-ray emission from Xe30+ ions at 350–600 keV impacting on an Au target was investigated at the Heavy Ion Research Facility at Lanzhou. Characteristic X-rays of Xe ions at energy of about 1.65 keV were observed. This X-ray emission is induced by the decay of very high Rydberg states of Xe ions. It was also found that the yield of such characteristic X-rays is decreasing with increasing the projectile kinetic energy. Simultaneously, the yield of the characteristic Au X-rays from the M shell increases also. These phenomena are qualitatively analyzed with the classical Coulomb over the Barrier Mode (COBM) for highly charged ions interacting with solid state surfaces.

The development of an electron cyclotron resonance ion source for the heavy ion research facility in Lanzhou

1998 ◽  
Vol 69 (2) ◽  
pp. 685-687 ◽  
Author(s):  
Liu Zhanwen ◽  
Zhang Wen ◽  
Zhao Hongwei ◽  
Yuan Ping ◽  
Zhang Xuezhen ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Heavy Ion ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Research Facility

scholarly journals Innovative Analytical Method for X-ray Imaging and Space-Resolved Spectroscopy of ECR Plasmas

2021 ◽  
Vol 7 (1) ◽  
pp. 5
Author(s):  
Eugenia Naselli ◽  
Richard Rácz ◽  
Sandor Biri ◽  
Maria Mazzaglia ◽  
Luigi Celona ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Electron Cyclotron Resonance ◽  
Dynamic Range ◽  
Single Photon ◽  
National Laboratory ◽  
Diagnostic System ◽  
Optical Emission ◽  
High Dynamic Range ◽  
Ion Source ◽  
X Ray

At the Italian National Institute for Nuclear Physics-Southern National Laboratory (INFN-LNS), and in collaboration with the ATOMKI laboratories, an innovative multi-diagnostic system with advanced analytical methods has been designed and implemented. This is based on several detectors and techniques (Optical Emission Spectroscopy, RF systems, interfero-polarimetry, X-ray detectors), and here we focus on high-resolution, spatially resolved X-ray spectroscopy, performed by means of a X-ray pin-hole camera setup operating in the 0.5–20 keV energy domain. The diagnostic system was installed at a 14 GHz Electron Cyclotron Resonance (ECR) ion source (ATOMKI, Debrecen), enabling high-precision, X-ray, spectrally resolved imaging of ECR plasmas heated by hundreds of Watts. The achieved spatial and energy resolutions were 0.5 mm and 300 eV at 8 keV, respectively. Here, we present the innovative analysis algorithm that we properly developed to obtain Single Photon-Counted (SPhC) images providing the local plasma-emitted spectrum in a High-Dynamic-Range (HDR) mode, by distinguishing fluorescence lines of the materials of the plasma chamber (Ti, Ta) from plasma (Ar). This method allows for a quantitative characterization of warm electrons population in the plasma (and its 2D distribution), which are the most important for ionization, and to estimate local plasma density and spectral temperatures. The developed post-processing analysis is also able to remove the readout noise that is often observable at very low exposure times (msec). The setup is now being updated, including fast shutters and trigger systems to allow simultaneous space and time-resolved plasma spectroscopy during transients, stable and turbulent regimes.

scholarly journals Observations of X-rays from Laboratory Sparks in Air at Atmospheric Pressure under Negative Switching Impulse Voltages

Atmosphere ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 169 ◽  
Author(s):  
Mahbubur Rahman ◽  
Pasan Hettiarachchi ◽  
Vernon Cooray ◽  
Joseph Dwyer ◽  
Vladimir Rakov ◽  
...  
Keyword(s):  
Rise Time ◽  
Atmospheric Pressure ◽  
Opposite Polarity ◽  
X Rays ◽  
X Ray ◽  
Impulse Voltage ◽  
First Time ◽  
Switching Impulses ◽  
Low Rate

We present observations of X-rays from laboratory sparks created in the air at atmospheric pressure by applying an impulse voltage with long (250 µs) rise-time. X-ray production in 35 and 46 cm gaps for three different electrode configurations was studied. The results demonstrate, for the first time, the production of X-rays in gaps subjected to switching impulses. The low rate of rise of the voltage in switching impulses does not significantly reduce the production of X-rays. Additionally, the timing of the X-ray occurrence suggests the possibility that the mechanism of X-ray production by sparks is related to the collision of streamers of opposite polarity.

Mesoscopic structure of SiC fibers by neutron and x-ray scattering

1996 ◽  
Vol 11 (5) ◽  
pp. 1169-1178 ◽  
Author(s):  
Kentaro Suzuya ◽  
Michihiro Furusaka ◽  
Noboru Watanabe ◽  
Makoto Osawa ◽  
Kiyohito Okamura ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Volume Fraction ◽  
X Rays ◽  
X Ray ◽  
Sic Fibers ◽  
X Ray Scattering ◽  
Mesoscopic Structure ◽  
Angle Scattering ◽  
Momentum Transfer Range ◽  
First Time

Mesoscopic structures of SiC fibers produced from polycarbosilane by different methods were studied by diffraction and small-angle scattering of neutrons and x-rays. Microvoids of a size of 4–10 Å in diameter have been observed for the first time by neutron scattering in a medium momentum transfer range (Q = 0.1–1.0 Å−1). The size and the volume fraction of β–SiC particles were determined for fibers prepared at different heat-treatment temperatures. The results show that wide-angle neutron scattering measurements are especially useful for the study of the mesoscopic structure of multicomponent materials.

Radiation Production Using Femtosecond Electron Bunches

2005 ◽  
Vol 107 ◽  
pp. 11-14
Author(s):  
C. Thongbai ◽  
V. Jinamoon ◽  
N. Kangrang ◽  
K. Kusoljariyakul ◽  
S. Rimjaem ◽  
...  
Keyword(s):  
Far Infrared ◽  
Bunch Length ◽  
X Rays ◽  
Research Facility ◽  
X Ray ◽  
Electron Bunches ◽  
Rf Gun ◽  
Intense Radiation ◽  
Far Infrared Radiation ◽  
Femtosecond Electron Bunches

Femtosecond electron bunches can be generated from a system consisting of an RF gun with a thermionic cathode, an alpha magnet, and a linear accelerator and can be used to produce femtosecond (fs) electromagnetic radiation pulses. At the Fast Neutron Research Facility (FNRF), Thailand, we are especially interested in production in Far-infrared (FIR) and x-radiation. In the far-infrared, radiation is emitted coherently for wavelengths which are longer than the electron bunch length, yielding intense radiation. Although, the x-rays emitted are incoherent, its femtosecond time scale is crucial for development of a femtosecond x-ray source.

scholarly journals Upgrading the ECR ion source within FAMA

2018 ◽  
Vol 33 (1) ◽  
pp. 47-52
Author(s):  
Andrey Efremov ◽  
Sergey Bogomolov ◽  
Vladimir Bekhterev ◽  
Aleksandar Dobrosavljevic ◽  
Nebojsa Neskovic ◽  
...  
Keyword(s):  
Electron Cyclotron Resonance ◽  
Ion Beam ◽  
Ion Source ◽  
Vacuum System ◽  
Multiply Charged Ions ◽  
Inlet System ◽  
Multiply Charged ◽  
Microwave System ◽  
Beam Currents ◽  
Charged Ions

Recent upgrading of the Facility for Modification and Analysis of Materials with Ion Beams - FAMA, in the Laboratory of Physics of the Vinca Institute of Nuclear Sciences, included the modernization of its electron cyclotron resonance ion source. Since the old ion source was being extensively used for more than 15 years for production of multiply charged ions from gases and solid substances, its complete reconstruction was needed. The main goal was to reconstruct its plasma and injection chambers and magnetic structure, and thus intensify the production of multiply charged ions. Also, it was decided to refurbish its major subsystems - the vacuum system, the microwave system, the gas inlet system, the solid substance inlet system, and the control system. All these improvements have resulted in a substantial increase of ion beam currents, especially in the case of high charge states, with the operation of the ion source proven to be stable and reproducible.

scholarly journals Optical Short-Time Variations in GK Persei during the 1983 Outburst

1987 ◽  
Vol 93 ◽  
pp. 485-485
Author(s):  
H. Steinle ◽  
W. Pietsck
Keyword(s):  
Accretion Disk ◽  
Time Resolution ◽  
X Rays ◽  
X Ray ◽  
Time Variations ◽  
Short Time ◽  
First Time ◽  
Calar Alto

AbstractDuring the August 1983 outburst of the old nova GK Persei observations with EXOSAT showed for the first time a 351 second periodicity in X-rays.Our fast photometry (U(B)V with 25 sec time resolution) was made at the end of the outburst in the nights of September 29 , and October 1–3 , using the 2.2 meter telescope at Calar Alto (Spain).Optical variations up to 10% in U and 4% in V with periodicities in the range 350 to 360 seconds were found, lasting only for few cycles.A comparison with the extrapolated prediction of the X-ray maxima did not show a coincidence, but rather an anticoincidence in several cases. This supports a model of reprocessed X-rays at the inner edge of an accretion disk.

Sign in / Sign up

Export Citation Format

Share Document