Influence of the bias voltage on the formation of beryllium films by a thermionic vacuum arc method

Anghel, A.; Mustaţǎ, I.; Poroşnicu, C.; Lungu, C.P.

doi:10.1016/j.jnucmat.2008.11.030

Cited by 15 publications

(15 citation statements)

References 7 publications

(6 reference statements)

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“…Polished stainless steel disks with a 25 mm in diameter served as substrates. In order to obtain good adherence and good compactness of the films, the substrates were negatively biased at À750 V [8]. In this way energetic ions from both Be and W plasmas were accelerated toward the substrate.…”

Section: Experiments -Sample Preparation and Pisces B Deuterium Plasmamentioning

confidence: 99%

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma

Jepu

Doerner

Baldwin

et al. 2015

Journal of Nuclear Materials

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Article history:Available online xxxx a b s t r a c t Beryllium-tungsten thin films with well controlled elemental composition were prepared using Thermionic Vacuum Arc (TVA) technique and subsequently exposed to steady state, high ion flux (5.5 À 9.8 Â 10 22 ions m À2 s À1 ) deuterium (D) plasma in the PISCES-B facility to consistent fluences of 2.3 Â 10 26 m À2 . Six types of layers were studied, ranging from pure Be, composite Be-W, having the atomic ratios of 9:1; 7:3; 1:1; 3:7; to pure W with a total deposited layer thickness of 2 lm. The sample exposure temperatures, namely 300 K, 473 K, 573 K and 773 K, respectively, were measured in situ with a thermocouple placed on the back of the sample. Morphological and structural examinations were undertaken before and after plasma exposure. Results show an influence of temperature on the subsequent morphology of the surface. Thermal Desorption Spectrometry (TDS) spectra showed a change in the D release behavior for different Be-W ratio for a certain exposure temperature.

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Section: Experiments -Sample Preparation and Pisces B Deuterium Plasmamentioning

confidence: 99%

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma

Jepu

Doerner

Baldwin

et al. 2015

Journal of Nuclear Materials

Self Cite

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“…The method is called thermionic vacuum arc (TVA) [3]. The principle of this method is the ignition of the plasma in pure vapors of the During the entire coating process, a negative bias voltage was applied on the tiles, with a value of -700V, which ensured a compact coating by rejecting the electrons and accelerating the positive ions from plasma [4].…”

Section: Methodsmentioning

confidence: 99%

“…For RBS measurements it had been used a 4 He energy beam of 2.6 MeV. The beam's energy value was chosen taking into account the interaction cross section of 4 He and beryllium to avoid the non-Rutherford interaction that may cause errors in the data interpretation.…”

Section: Methodsmentioning

confidence: 99%

“…The beam's energy value was chosen taking into account the interaction cross section of 4 He and beryllium to avoid the non-Rutherford interaction that may cause errors in the data interpretation. The fitting of the experimental data was done using SIMNRA code, developed at IPP Garching.…”

Section: Methodsmentioning

confidence: 99%

“…The fitting of the experimental data was done using SIMNRA code, developed at IPP Garching. [6] The nuclear reaction D( 3 He, p) 4 He offers information about the implanted deuterium inside the film. For the detection of the resulting particles (α and protons), two detectors are beeing used, positioned at 102 o for protons and 135 o for α particles.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Influence of beryllium carbide formation on deuterium retention and release

Poroşnicu

Anghel

Sugiyama

et al. 2011

Journal of Nuclear Materials

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The Inconel cladding tiles of the ITER-like-wall to be tested at JET will be coated by a beryllium layer. Carbon containing tiles will be also present. These materials are sputtered in the high flux (10 22 m -2 s -1 or higher) of the deuterium-tritium plasma. Ionized by the energetic electrons and with hydrogen isotope ions they will be implanted or re-deposited, creating composite layers.In order to study the deuterium retention and release, mixed layers were prepared using the thermionic arc method.Deuterium implantation was performed using a high current ion source at room temperature using a deuterium ion beam with energy of 200eV/D. Thermal Desorption Spectroscopy (TDS) analyses were correlated with the beryllium/carbon relative concentrations of the prepared films. At higher carbon concentrations the peak value from TDS spectra corresponding to beryllium was lower and an increased peak corresponding to the carbon was observed.

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Beryllium thin films deposited by thermionic vacuum arc for nuclear applications

Tiron

Poroşnicu

Dincă

et al. 2019

Applied Surface Science

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Influence of the bias voltage on the formation of beryllium films by a thermionic vacuum arc method

Cited by 15 publications

References 7 publications

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma

Influence of beryllium carbide formation on deuterium retention and release

Beryllium thin films deposited by thermionic vacuum arc for nuclear applications

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