Investigations on rf breakdown phenomenon in high gradient accelerating structures / Jiahang Shao.
Shao, Jiahang, author.
2018
TK6553
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Title Investigations on rf breakdown phenomenon in high gradient accelerating structures / Jiahang Shao.
Author Shao, Jiahang, author.
ISBN 9789811079269 (electronic book)
9811079269 (electronic book)
9789811079252
9811079250
DOI https://doi.org/10.1007/978-981-10-7926-9
Published Singapore : Springer, 2018.
Language English
Description 1 online resource.
Item Number 10.1007/978-981-10-7926-9 doi
Call Number TK6553
Dewey Decimal Classification 621.3841
Summary This book mainly focuses on the experimental research of rf breakdown and field emission with novel methods, including triggering rf breakdown with high intensity laser and pin-shaped cathodes as well as locating field emitters with a high resolution in-situ imaging system. With these methods, this book has analyzed the power flow between cells during rf breakdown, observed the evolution of field emission during rf conditioning and the dependence of field emission on stored energy, and studied the field emitter distribution and origination. The research findings greatly expand the understanding of rf breakdown and field emission, which will in turn benefit future study into electron sources, particle accelerators, and high gradient rf devices in general.
Note "Doctoral thesis accepted by the Tsinghua University, Beijing, China."
Bibliography, etc. Note Includes bibliographical references.
Access Note Access limited to authorized users.
Digital File Characteristics text file PDF
Source of Description Online resource; title from PDF title page (viewed January 26, 2018).
Series Springer theses.
Available in Other Form Investigations on rf breakdown phenomenon in high gradient accelerating structures.
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1 Introduction; 1.1 Application of High Gradient Accelerating Structures; 1.1.1 Compact Electron-Positron Collider; 1.1.2 Compact Light Source; 1.1.3 Photocathode rf Gun; 1.1.4 Industry/Medical Accelerator; 1.2 rf Breakdown; 1.2.1 Phenomenon; 1.2.2 Impact; 1.2.3 Research Status; 1.3 Field Emission; 1.3.1 Phenomenon; 1.3.2 Research Status; 1.4 Main Content and Innovation; References; 2 Experimental Research of Laser-Triggered rf Breakdown; 2.1 Physical Background; 2.2 Experimental Setup; 2.2.1 S-Band Photocathode rf Gun.

2.2.2 Diagnostics2.3 Experiment Observation; 2.3.1 Surface Damage Test; 2.3.2 High Power Test; 2.4 Basic Analysis; 2.4.1 Modes Evolution; 2.4.2 Frequency Detuning; 2.4.3 Time Structure of rf Breakdown Current; 2.5 Advanced Analysis with an Equivalent Circuit Model; 2.5.1 Equivalent Circuit Model; 2.5.2 Basic Equations; 2.5.3 Parameters; 2.5.4 Analysis; 2.5.5 Discussion; 2.6 Summary; References; 3 Experimental Research of Pin Cathode; 3.1 L-Band Photocathode rf Gun Test Stand; 3.1.1 L-Band Photocathode rf Gun; 3.1.2 Test Stand; 3.2 Evolution of Field Emission During rf Conditioning.

3.2.1 rf Conditioning of Pin Cathodes3.2.2 Field Emission Measurement; 3.2.3 Surface Examination; 3.2.4 Discussion; 3.3 Field Emission Dependence on Stored Energy; 3.3.1 Field Emission Current Measurement; 3.3.2 Dynamics of Field Emission Current; 3.3.3 Possible Mechanisms; 3.3.4 Discussion; 3.4 Summary; References; 4 In-situ High Resolution Field Emission Imaging; 4.1 Imaging Method; 4.1.1 Difficulties; 4.1.2 Solution; 4.2 Dynamics Simulation; 4.2.1 Imaging Properties; 4.2.2 Electron Distribution; 4.2.3 Emission Phase Selection; 4.2.4 Beam Line Optimization; 4.3 Experiment Preparation.

4.3.1 New Cathode4.3.2 Beam Line Upgrading; 4.4 High Resolution Field Emission Imaging Experiment; 4.4.1 In-situ High Resolution Field Emitter Observation; 4.4.2 Field Enhancement Factor Measurement; 4.4.3 Surface Analysis; 4.5 Summary; References; 5 Summary and Future Study; Appendix A Calculating the Electric Field on the Pin Cathode.

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