Browsing Articles by Author "Insepov, Z."

Now showing items 1-20 of 25

Acoustoelectric properties of graphene under the influence of saw and external electric field

Insepov, Z.; Tynyshtykbayev, Kurbangali B.; Kononenko, Oleg V.; Roshchupkin, Dmitry V. (Nazarbayev University, NURIS, Institute of Microelectronics Technology and High Purity Materials, 2015)

The effect of SAW on the electrical properties of the few-layer (2-3 layers) graphene is studied. Under the influence of SAW the appearence of acoustoelectric current IAEC in graphene is observed. The sign and magnitude ...
A model of rf breakdown arcs

Insepov, Z.; Bross, A.; Qian, Z.; Norem, J.; Huang, D.; Veitzer, S.; Torun, Y. (Fermilab, 2008)

This paper presents a rst iteration of a model that attempts to describe all aspects of breakdown in rf cavities and provides some estimates of the parameters and parameter ranges involved, as an aid to producing more ...
A New Multiscale Approach to Nuclear Fuel Simulations: Atomistic Validation of Kinetic Method

Insepov, Z.; Rest, J.; Hofman, G. L.; Yacout, A.; Norman, G. E.; Starikov, S. A.; Stegailov, V. V. (Transactions of the American Nuclear Society, 2010)

A key issue for fuel behavior codes is their sensitivity to values of various materials properties, many of which have large uncertainties or have not been measured. Kinetic mesoscale models, such as those developed at ...
Atomic layer deposition for TiO2 and TiN nanometer films

Ainabayev, Ardak; Bozheyev, Farabi; Zhuldassov, Abat; Lukasheva, Maria; Tynyshtykbaev, Kurbangali B.; Insepov, Z. (Materials Today: Proceedings, 2017-01-01)

Abstract In this work processes of atomic layer deposition (ALD) of TiO2 and TiN using ALD method and impact of thickness and composition of grown film on stoichiometry and morphology of deposited layer are investigated. ...
Can surface cracks and unipolar arcs explain breakdown and gradient limits?

Insepov, Z.; Norem, J. (J. Vac. Sci. Technol, 2013)

We argue that the physics of unipolar arcs and surface cracks can help understand rf breakdown, and vacuum arc data. We outline a model of the basic mechanisms involved in breakdown and explore how the physics of unipolar ...
Craters on silicon surfaces created by gas cluster ion impacts

Allen, L. P.; Insepov, Z.; Fenner, D. B.; Santeufemio, C.; Brooks, W.; Jones, K. S.; Yamada, I. (Journal of applied physics, 2002)

Atomic force microscopy ~AFM! and high-resolution transmission electron microscope ~HRTEM! cross section imaging of individual gas cluster ion impact craters on Si~100! and Si~111! substrate surfaces is examined. The ...
Effects of surface damage on rf cavity operation

Hassanein, A.; Insepov, Z.; Norem, J.; Moretti, A.; Qian, Z.; Bross, A.; Seidman, D. N. (Physical Review Special Topics-Accelerators and Beams, 2006)

We describe a model of damage in rf cavities and show how this damage can limit cavity operation. We first present a review of mechanisms that may or may not affect the ultimate fields that can be obtained in rf cavities, ...
AN INTEGRATED APPROACH TO UNDERSTANDING RF VACUUM ARCS

Norem, J.; Insepov, Z.; Hassanein, A. (Nature Research, 2021-01-27)

Although used in the design and costing of large projects such as linear colliders and fusion tokamaks, the theory of vacuum arcs and gradient limits is not well understood. Almost 120 years after the isolation of vacuum ...
Investigation of Nanohydrophobic Sand as an Insulating Layer for Cultivation of Plants in Soils Contaminated with Heavy Metals

Myrzabaeva, M.; Insepov, Z.; Boguspaev, K. K.; Faleev, D. G.; Nazhipkyzy, M.; Lesbayev, B. T.; Mansurov, Z. A. (urasian Chemico-Technological Journal, 2017)

The paper presents the results of laboratory experiments to test hydrophobic sand, on the basis of soot as an insulating for growing plants-hyperaccumulators heavy metals ‒ amaranth (Amaranthus paniculatus) and sunflower ...
Modeling of High-Gradient Vacuum Breakdown

Ainabayev, A.; Berdenova, B.; Norem, J.; Insepov, Z. (arXiv preprint arXiv:1410.6501, 2014)

Comsol finite element technique was applied to study heating and cooling of a microspot on the cathode surface. The reasons why there seems to be no common model for vacuum arcs, in spite of the importance of this field ...
Modeling RF breakdown arcs

Insepov, Z.; Norem, J.; Proslier, T.; Huang, D.; Mahalingam, S.; Veitzer, S. (arXiv preprint arXiv:1003.1736, 2010)

We describe breakdown in 805 MHz rf accelerator cavities in terms of a number of self-consistent mechanisms. We divide the breakdown process into three stages: (1) we model surface failure using molecular dynamics of ...
Modeling Vacuum Arcs

Insepov, Z.; Norem, J.; Proslier, T.; Huang, D.; Mahalingam, S.; Veitzer, S. (arXiv preprint arXiv:1006.3770, 2010)
Modification on surface oxide layer structure and surface morphology of niobium by gas cluster ion beam treatments

Wu, A. T.; Swenson, D. R.; Insepov, Z. (Physical Review Special Topics-Accelerators and Beams, 2010)

Recently, it was demonstrated that significant reductions in field emission on Nb surfaces could be achieved by means of a new surface treatment technique called gas cluster ion beam (GCIB). Further study as shown in this ...
Molecular-dynamics simulation of thin-film growth by energetic cluster impact

Haberland, H.; Insepov, Z.; Moseler, M. (Physical Review B, 1995)

Langevin-molecular-dynamics simulations of thin-film growth by energetic cluster impact were carried out. The impact of a Mo 1043 cluster on a Mo(001) surface was studied for impact energies of 0.1, 1, and 10 eV/atom using ...
New mechanism of cluster-field evaporation in rf breakdown

Insepov, Z.; Norem, J. H.; Hassanein, A. (Physical Review Special Topics-Accelerators and Beams, 2004)

Using a simple field evaporation model and molecular dynamics simulations of nanoscale copper tip evolution in a high electric field gradient typical for linacs, we have studied a new mechanism for rf-field evaporation. ...
On the relationship between dynamic solubility, multi-atom bubble nucleation, irradiationinduced re-solution, and the bubble size distribution in Xe implanted Mo

Rest, D.; Yun, B. Ye; Insepov, Z. (Argonne National Laboratory, 2013)

U-Mo alloys are candidate fuels for both research and test reactors, as well as for advanced power reactors. A critical requirement for these candidate fuels is stable swelling behavior over their expected lifetime. ...
Proposal for a hardness measurement technique without indentor by gas-cluster-beam bombardment

Insepov, Z.; Manory, R.; Matsuo, J.; Yamada, I. (Physical Review B, 2000)

Large gas-cluster-ion bombardment has been shown to be a unique tool for generating a variety of bombarding effects over a broad range of acceleration energies. A hardness measurement technique is proposed in this paper ...
Radiation-induced damage and evolution of defects in Mo

Starikov, S. V.; Insepov, Z.; Rest, J.; Kuksin, A. Y.; Norman, G. E.; Stegailov, V. V.; Yanilkin, A. V. (Physical Review B, 2011)

The formation of defects in bcc Mo lattice as a result of 50-keV Xe bombardment is studied via atomistic simulation with an interatomic potential developed using the force-matching ab initio based approach. The defect ...
Secondary electron yield of emissive materials for large-area micro-channel plate detectors: surface composition and film thickness dependencies

Jokela, S. J.; Veryovkin, I. V.; Zinovev, A. V.; Elam, J. W.; Mane, A. U.; Peng, Q.; Insepov, Z. (Physics Procedia, 2012)

The ongoing development of Atomic Layer Deposition (ALD) enables the use of relatively inexpensive and robust borosilicate micro-channel substrates for use as Micro-Channel Plates (MCPs). The surfaces of the channels in ...
Sheath parameters for non-Debye plasmas: Simulations and arc damage

Morozov, I. V.; Norman, G. E.; Insepov, Z.; Norem, J. (Physical Review Special Topics-Accelerators and Beams, 2012)

This paper describes the surface environment of the dense plasma arcs that damage rf accelerators, tokamaks, and other high gradient structures. We simulate the dense, nonideal plasma sheath near a metallic surface using ...