Investigation on current transformers for measuring of electron beam pulse current

© Published under licence by IOP Publishing Ltd. The radio-frequency (RF) linear accelerator (linac) system of the PBP-CMU Electron Linac Laboratory at the Plasma and Beam Physics Research Facility is used as an injector system for future mid-infrared and terahertz free-electron lasers. The properti...

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Main Authors: P. Nanthanasit, S. Rimjaem
Format: Conference Proceeding
Published: 2020
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/68071
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-680712020-04-02T15:18:11Z Investigation on current transformers for measuring of electron beam pulse current P. Nanthanasit S. Rimjaem Physics and Astronomy © Published under licence by IOP Publishing Ltd. The radio-frequency (RF) linear accelerator (linac) system of the PBP-CMU Electron Linac Laboratory at the Plasma and Beam Physics Research Facility is used as an injector system for future mid-infrared and terahertz free-electron lasers. The properties of electron beams produced from the linac must be controlled appropriately to produce high-quality radiation. One of the most important properties is the electron pulse current that can be measured using a current transformer. A copper wire with proper insulator is wounded around the ferrite-core forming a secondary coil of the current transformer. The electron beam passing through the transformer acts as the current in the primary coil and it induces an electromotive force in the secondary coil. Therefore, the output signal from the secondary coil can be measured and analyzed to be a pulse current of electron beam. The measured current pulse shape and value strongly depend on the characteristics of the current transformer. This study focuses on testing and calibrating of existing current transformers installed in the linac system. In the experiments, the pulse generator was used to generate the input pulse current with various pulse lengths. The output pulses were then sampled with a digital oscilloscope. The experimental results showed that the output pulses from the current transformers have distort shape compared with the input pulses. Consequently, the correction was conducted to provide more accuracy of the measuring value of the electron pulse current. The results of this research can be used as a valuable database for the existing current transformers and to develop the new ones that can provide more accurate results. 2020-04-02T15:18:11Z 2020-04-02T15:18:11Z 2019-12-16 Conference Proceeding 17426596 17426588 2-s2.0-85077811217 10.1088/1742-6596/1380/1/012149 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077811217&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/68071
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
P. Nanthanasit
S. Rimjaem
Investigation on current transformers for measuring of electron beam pulse current
description © Published under licence by IOP Publishing Ltd. The radio-frequency (RF) linear accelerator (linac) system of the PBP-CMU Electron Linac Laboratory at the Plasma and Beam Physics Research Facility is used as an injector system for future mid-infrared and terahertz free-electron lasers. The properties of electron beams produced from the linac must be controlled appropriately to produce high-quality radiation. One of the most important properties is the electron pulse current that can be measured using a current transformer. A copper wire with proper insulator is wounded around the ferrite-core forming a secondary coil of the current transformer. The electron beam passing through the transformer acts as the current in the primary coil and it induces an electromotive force in the secondary coil. Therefore, the output signal from the secondary coil can be measured and analyzed to be a pulse current of electron beam. The measured current pulse shape and value strongly depend on the characteristics of the current transformer. This study focuses on testing and calibrating of existing current transformers installed in the linac system. In the experiments, the pulse generator was used to generate the input pulse current with various pulse lengths. The output pulses were then sampled with a digital oscilloscope. The experimental results showed that the output pulses from the current transformers have distort shape compared with the input pulses. Consequently, the correction was conducted to provide more accuracy of the measuring value of the electron pulse current. The results of this research can be used as a valuable database for the existing current transformers and to develop the new ones that can provide more accurate results.
format Conference Proceeding
author P. Nanthanasit
S. Rimjaem
author_facet P. Nanthanasit
S. Rimjaem
author_sort P. Nanthanasit
title Investigation on current transformers for measuring of electron beam pulse current
title_short Investigation on current transformers for measuring of electron beam pulse current
title_full Investigation on current transformers for measuring of electron beam pulse current
title_fullStr Investigation on current transformers for measuring of electron beam pulse current
title_full_unstemmed Investigation on current transformers for measuring of electron beam pulse current
title_sort investigation on current transformers for measuring of electron beam pulse current
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85077811217&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68071
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