Simulation of radiation effects on reflectors using heavy ion beams

Vojtsenya, V.S.; Borisenko, Yu. N.; Брык, В.В.; Gann, V. V.; Grigorenko, B. V.; Gritsyna, V.T.; Khorenko, V.K.; Konovalov, V. G.; Koval, I.F.; Lubinetsky, I.V.; Orlinskij, D.V.; Pyatnitsky, M.Yu.; Shapoval, A. N.; Voevodin, V. G.; Volobuev, A.V.

doi:10.1016/0022-3115(94)91105-3

Cited by 7 publications

(13 citation statements)

References 3 publications

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“…Thus, in the simulation experiments, nearly 50% of radiation-induced defects are formed under conditions rather similar to those of the stainless steel first-wall irradiation by 14 MeV neutrons up to a depth of about 0.8 μm. This depth nearly coincides with the mean range of 3 MeV chromium ions [6,10] and exceeds essentially the skin layer thickness.…”

Section: Basis Of the Simulation Methodsmentioning

confidence: 82%

“…When beams of two energies (1 and 3 MeV) are used, the inhomogeneity of the dose depth distribution increases but still remains at an acceptable level (±16%) [6,10].…”

Section: Basis Of the Simulation Methodsmentioning

confidence: 99%

“…The qualitative effect is characterized by the spectra of PKAs in the target. To verify the correctness of neutron radiation simulation with chromium ion beams, the PKA calculated spectra from 14 MeV neutrons and chromium ions were compared using the so-called similarity factor K sim [6,9,10]. This factor is defined by the overlapping area under the corresponding P (E) curves, which is respectively.…”

Section: Basis Of the Simulation Methodsmentioning

confidence: 99%

“…To check the neutron flux effects on the mirror reflectance a simulation was proposed [6], when the mirror is bombarded with megaelectronvolt-energy range ions of the same elements, which are abundant materials in the mirror body (section 3).…”

Section: Processes In Fusion Reactors Which May Be Dangerous For Thementioning

confidence: 99%

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First mirrors for diagnostic systems of an experimental fusion reactor I. Simulation mirror tests under neutron and ion bombardment

Orlinski

Voitsenya

Vukolov

2007

Plasma Devices and Operations

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2007) First mirrors for diagnostic systems of an experimental fusion reactor I. Simulation mirror tests under neutron and ion bombardment, Plasma Devices and Operations, 15:1, 33-75To link to this article: http://dx.Among the diagnostic systems planned for use in the International Thermonuclear Experimental Reactor to control the reactor operation, a large number of these systems have to use the mirrors to input or output the electromagnetic radiation to or from the burning plasma in different parts of the spectrum. The mirrors placed inside the vacuum vessel will be subjected to the impact of several factors, resulting in degradation in their optical characteristics. The most critical factors are erosion under the bombardment with a flux of high-energy particles, deuterons and tritons, and the deposition of the products of erosion of the in-vessel components. The first part of this review presents the results of the simulation experiments studying the effect of sputtering and deposition of contaminants on the optical properties of mirrors fabricated from different materials. In the second part of the review, the results of mirror testing on the operating large-scale fusion devices are considered.

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Section: Basis Of the Simulation Methodsmentioning

confidence: 82%

“…When beams of two energies (1 and 3 MeV) are used, the inhomogeneity of the dose depth distribution increases but still remains at an acceptable level (±16%) [6,10].…”

Section: Basis Of the Simulation Methodsmentioning

confidence: 99%

Section: Basis Of the Simulation Methodsmentioning

confidence: 99%

Section: Processes In Fusion Reactors Which May Be Dangerous For Thementioning

confidence: 99%

See 2 more Smart Citations

First mirrors for diagnostic systems of an experimental fusion reactor I. Simulation mirror tests under neutron and ion bombardment

Orlinski

Voitsenya

Vukolov

2007

Plasma Devices and Operations

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“…Имитационные исследования со-хранности диагностических зеркал в условиях, сначала имитирующих условия термоядерного реактора, были начаты в конце прошлого столетия в Харькове [20], а затем, уже в нынешнем столетии, распространились и в других странах. Использовались уже не макетные условия, зеркала испытыва-лись уже на действующих термоядерных установках [21]. Если макетные исследования были ориенти-рованы на возможное распыление зеркал, то испытания зеркал на действующих термоядерных уста-новках указали на осаждение примесей, как на главную для них опасность.…”

Section: заключениеunclassified

Is It Possible to Avoid of Blister Formation in the Diagnostic Mirrors?

Orlinski¹

2009

PAST-TF

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Системы диагностики плазмы и управления разрядом на действующих крупных термоядерных установках обычно оснащ а-ются зеркалами для ввода зондирующего и вывода собственного или отражённого оптического и микроволнового излуче-ния. Вместе с тем эти зеркала подвержены бомбардировке ионами плазмы, а также на них могут осаждаться ионы примесей, обычно в плазме присутствующих. В течение последних десятилетий воздействие ионных потоков на металлы активно ис-следовалось с точки зрения их влияния на некоторые металлические элементы конструкции вакуумной камеры, что может оказаться существенным для сохранности стенок дивертора токамака. А в последние годы на возможность снижения отр а-жательной способности металлических зеркал обратили внимание и специалисты, разрабатывающие системы диагностики плазмы. При взаимодействии быстрых ионов с поверхностью зеркала его отражательная способность может ухудшаться в результате катодного распыления, если энергия ионов превышает несколько сот электрон-вольт, и, как выяснилось в по-следние десятилетия, в результате накопления и последующего разрушения газовых пузырей (блистеров) в приповерхнос т-ном слое зеркала, накапливаемых в процессе облучения металла ионами газов с энергиями, превышающими несколько элек-трон-вольт. В предлагаемом вниманию читателей кратком обзоре публикаций, главным образом, японских авторов излаг а-ются основные результаты этих ещё не завершённых исследований.Ключевые слова: блистер, зеркало, взаимодействие иона с поверхностью вольфрама. IS IT POSSIBLE TO AVOID OF BLISTER FORMATION IN THE DIAGNOSTIC MIRRORS? D.V. ORLINSKI.The systems of the plasma diagnostic and discharge management at the large thermonuclear installations are usually used mirrors for introduce of a probing and to turn out of the own or reflected optical or microwave radiation. At the same time these mirrors may be subjected to the plasma ions bombardment and on their surface may fall different mixtures usually are presented in the plasma. During the last tens years the interaction of the ion fluxes with different metals were actively investigated for to study their influence on the metal elements of the vacuum chamber, what may be essential for a conservation of the divertor walls in the tokamaks. At the last years the specialists in the plasma diagnostics were turned their attention on a possibility of the metal mirrors reflectivity lowering. During fast ions interaction with the mirror surfaces their reflectivity may be loss in a result of a cathode sputtering if their energy is larger then a some hundred of an electron-volts and, as was cleared during the last decades, as a result of appearance of the gas bubbles (the blisters) at the surface layer and subsequent their destruction. In proposals for readers attention short survey of the publications, manly from Japanese publications, there are given the main of yet not finished investigations.

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