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Temperature dependence of hole drift mobility in high-purity single-crystal CVD diamond
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
Element Six Ltd., King's Ride Park, Ascot, Berkshire, SL5 8BP, UK.
Element Six Ltd., King's Ride Park, Ascot, Berkshire, SL5 8BP, UK.
2005 (English)In: Physica status solidi. A, Applied research, ISSN 0031-8965, E-ISSN 1521-396X, Vol. 202, no 11, 2194-2198 p.Article in journal (Refereed) Published
Abstract [en]

Hole transport properties in high-purity single crystal CVD diamond samples were studied using the time of flight technique with optical excitation of the carriers. The measurements were taken at different temperatures in the interval 80-470 K. By varying the intensity of the optical excitation over several orders of magnitude, measurements at different carrier concentrations have been performed. In this way, measurements have been made both in the space charge limited and non space charge limited regimes, with consistent results. The temperature dependence of the low-field hole drift mobility shows a 7(alpha) dependence with a approximate to -1.5, below 350 K. This indicates that acoustic phonon scattering is the dominant scattering mechanism and a very low concentration of ionized impurities in this material.

Place, publisher, year, edition, pages
2005. Vol. 202, no 11, 2194-2198 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
URN: urn:nbn:se:uu:diva-94207DOI: 10.1002/pssa.200561915ISI: 000231925500028OAI: oai:DiVA.org:uu-94207DiVA: diva2:167978
Available from: 2006-04-06 Created: 2006-04-06 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Inductive Pulse Generation
Open this publication in new window or tab >>Inductive Pulse Generation
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Pulsed power generators are a key component in compact systems for generation of high-power microwaves (HPM). HPM generation by virtual cathode devices such as Vircators put high demands on the source. The rise time and the pulse length of the source voltage are two key issues in the generation of HPM radiation. This thesis describes the construction and tests of several inductive high power pulse generators. The pulse generators were designed with the intent to deliver a pulse with fast rise time and rectangular voltage. Therefore, the pulse generators are all based on discharges of transmission lines. The transmission lines used in the pulse generators are modern high voltage cables normally used in power transmission. All tested pulse generators have step up transformers as intermediate magnetic energy storage. Further, the pulse generators have contributed to the knowledge of compact designs. Closing switches is another important device in pulse generator architectures. In general, high power switching involving large currents and high voltages requires the use of robust switches. The switches used in the pulse generators of this thesis are of gas and liquid type.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2006. 93 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 159
Keyword
Technology, Pulsed Power, Inductive Pulse Generator, High Voltage, Semicon, XLPE, TEKNIKVETENSKAP
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-6699 (URN)91-554-6506-4 (ISBN)
Public defence
2006-04-28, Polhemsalen, Ångströmslaboratoriet, Uppsala, 13:15
Opponent
Supervisors
Available from: 2006-04-06 Created: 2006-04-06 Last updated: 2013-07-26Bibliographically approved

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Isberg, Jan

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