Download or read book Low Energy Sputtering Studies of Boron Nitride with Xenon Ions written by and published by . This book was released on 1999 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Results of Low Energy Sputter Yields of Boron Nitride Due to Xenon Ion Bombardment Preprint written by and published by . This book was released on 2008 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe the development of an experimental apparatus geared towards measurement of boron nitride sputtering by low energy ions. A four-grid system is used to achieve a collimated beam at low energy (

Download or read book Sputtering investigation of boron nitride with xenon ion written by Jiping Zhang and published by . This book was released on 1996 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Total and Differential Sputter Yields of Boron Nitride Measured by Quartz Crystal Microbalance Preprint written by and published by . This book was released on 2009 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present differential sputter yield measurements of boron nitride due to bombardment by xenon ions. A four-grid ion optics system is used to achieve a collimated ion beam at low energy (

Download or read book Differential Sputter Yields of Boron Nitride Quartz and Kapton Due to Low Energy Xe Bombardment Preprint written by A. P. Yalin and published by . This book was released on 2007 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this contribution we present results of differential sputter yield measurements of boron nitride, quartz, and kapton due to bombardment by xenon ions. The measurements are made using a sputtering diagnostic based on a quartz crystal microbalance (QCM). The QCM measurement allows full angular resolution, i.e. differential sputtering yield measurements are measured as a function of both polar angle and azimuthal angle. Measured profiles are presented for 100, 250, 350 and 500 eV Xe+ bombardment at 0?, 15?, 30? and 45? angles of incidence. We fit the measured profiles with Modified Zhang expressions using two free parameters: the total sputter yield, Y, and characteristic energy E*. Total yields are calculated from the differential profiles and are compared with published values and weight loss values where possible.

Download or read book Synthesis and Properties of Boron Nitride written by J.J. Pouch and published by Trans Tech Publications Ltd. This book was released on 1991-01-01 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boron nitride thin films can be deposited on different substrates using techniques such as plasma deposition, ion beam deposition and reactive sputter deposition.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low energy sputtering investigation of molybdenum and tantalum with xenon ions written by Sugato Bhattacharjee and published by . This book was released on 1996 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ion Assisted Sputter Deposition and Structural Characterization of Cubic Boron Nitride written by Shirley L. Matson Kidner and published by . This book was released on 1994 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Boron Nitride Nanomaterials written by Ben McLean and published by CRC Press. This book was released on 2022-12-23 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boron nitride was first produced in the 18th century and, by virtue of its extraordinary mechanical strength, has found extensive application in industrial processes since the 1940s. However, the more recent discovery that boron nitride allotropes are as structurally diverse as those of carbon (e.g. fullerenes, graphene, carbon nanotubes) has placed this material, and particularly its low-dimensional allotropes, back at the forefront of modern material science. This book provides a comprehensive history of this rapid rise in the status of boron nitride and boron nitride nanomaterials, spanning the earliest examples of three-dimensional boron nitride allotropes, through to contemporary structures such as monolayer hexagonal boron nitride, boron nitride nanomeshes, boron nitride nanotubes and the incorporation of boron nitride into cutting-edge van der Waals heterostructures. It specifically focuses on the properties, applications and synthesis techniques for each of these allotropes and examines how the evolution in boron nitride production methods is linked to that in our understanding of how low-dimensional nanomaterials self-assemble, or ‘grow’, during synthesis. The book demonstrates the key synergy between growth mechanisms and the development of new, advanced nanostructured materials.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large Angle Xenon Ion Scattering in Xe Propelled Electrostatic Thrusters Differential Cross Sections written by and published by . This book was released on 2008 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastic scattering between xenon ions and xenon atoms can produce ion currents at large angles with respect to the axis of electro- static thrusters. Differential scattering cross sections are needed to properly predict off-axis currents that can cause significant material erosion due to sputtering. Guided-ion beam differential cross section measurements are presented for Xe(exp +) + Xe and Xe(exp 2+) + Xe elastic scattering at labora tory ion energies between 5 and 40 eV per ion charge. For the singly charged system, the experimental absolute differential cross sections are in excellent agreement with classical elastic scattering calculations based on the most recent ab inttio ion-atom interaction potentials. The measure- ments for the doubly charged system are used to derive an approximate effective Xe(exp 2+) - Xe interaction potential. The potentials are used to calcu late absolute differential cross sections for both ion charge states at a typical Hall thruster ion of 270 eV per unit charge. The differential cross sections for the doubly charged ions are approximately a factor of 3 smaller than those of the singly charged system at large scattering angles. The importance of doubly charged ions with respect to material erosion is discussed on the basis of known sputtering yields as a function of ion energy for molybdenum and boron nitride. It is concluded that at typical charge-state ratios, doubly charged ions only have an impact at scattering angles where the scattered ion energy in the laboratory (thruster) frame of reference is low and the sputtering yields depend very strongly on ion energy.

Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2008-12-22 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book LOW ENERGY SPUTTERING STUDIES written by DANIEL. MCKEOWN and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made on the sputtering of gold and aluminum in beams of noble gases at normal incidence between 0 and 1000 ev. Gold was bombarded by He(+), Ne(+), Ar(+), and Xe(+), and aluminum by Ne(+), Ar(+), and Kr(+). Sputtering was measured by the crystal oscillator method. Using 20-Mc crystals in the oscillator, it was possible to detect the average sputtering of 0.01 angstrom from a surface. Secondary electron emission from the target was suppressed, and sputtering yields, mu, are given in atoms per ion. Increases in mu with beam energy are a more nearly linear function than has been previously reported in terms of mu/1 + gamma, where gamma is the number of secondary electrons emitted per incident ion. The experimental results are interpreted and analyzed in the light of present theories on sputtering yields and thresholds. (Author).