Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses
碩士 === 國立清華大學 === 先進光源科技學位學程 === 99 === RF linacs are able to provide stable ultra-relativistic electron beams with excellent beam quality. Such beams can be used to produce high power microwaves by extracting the wave power from a specially designed rf structure in which wake-fields are excited by...
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ndltd-TW-099NTHU50311422015-10-13T20:23:00Z http://ndltd.ncl.edu.tw/handle/85773500824688243206 Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses 利用線型加速器中高重覆率相對論性短脈衝電子束產生兆瓦級高功率微波之研究 Huang, Cheng-Wei 黃正瑋 碩士 國立清華大學 先進光源科技學位學程 99 RF linacs are able to provide stable ultra-relativistic electron beams with excellent beam quality. Such beams can be used to produce high power microwaves by extracting the wave power from a specially designed rf structure in which wake-fields are excited by the electron beam and are stored in the structure. The power level of this type of high power microwave source can be as high as a few hundred megawatts and can be used to drive high gradient linear accelerator as well as microwave undulator for free electron lasers. A compact design of X-ray free electron laser using short-period microwave undulator is under discussion at National Synchrotron Radiation Research Center (NSRRC) in the high brightness injector research team. In this study, we tentatively designed a 12 GHz, 2??3 mode disk-loaded periodic waveguide structure such that 100 MW of microwave power can be extracted from a 3 GHz repetition-rate electron beam of 5 nC bunch charge. The geometry of this structure (including upstream and downstream output couplers) has been set by extensive electromagnetic wave and wake-field calculations by HFSS and CST particle studio. We also built a prototype structure for characterization of microwave properties at low power level. We have identified that a 2??3 mode has be excited in the structure with resonant frequency and group velocity close to their design values. R/Q has been obtained by means of bead-pull measurement that agrees very well with the designed value. 柳克強 劉偉強 2011 學位論文 ; thesis 109 zh-TW |
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碩士 === 國立清華大學 === 先進光源科技學位學程 === 99 === RF linacs are able to provide stable ultra-relativistic electron beams with excellent beam quality. Such beams can be used to produce high power microwaves by extracting the wave power from a specially designed rf structure in which wake-fields are excited by the electron beam and are stored in the structure. The power level of this type of high power microwave source can be as high as a few hundred megawatts and can be used to drive high gradient linear accelerator as well as microwave undulator for free electron lasers. A compact design of X-ray free electron laser using short-period microwave undulator is under discussion at National Synchrotron Radiation Research Center (NSRRC) in the high brightness injector research team. In this study, we tentatively designed a 12 GHz, 2??3 mode disk-loaded periodic waveguide structure such that 100 MW of microwave power can be extracted from a 3 GHz repetition-rate electron beam of 5 nC bunch charge. The geometry of this structure (including upstream and downstream output couplers) has been set by extensive electromagnetic wave and wake-field calculations by HFSS and CST particle studio. We also built a prototype structure for characterization of microwave properties at low power level. We have identified that a 2??3 mode has be excited in the structure with resonant frequency and group velocity close to their design values. R/Q has been obtained by means of bead-pull measurement that agrees very well with the designed value.
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author2 |
柳克強 |
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柳克強 Huang, Cheng-Wei 黃正瑋 |
author |
Huang, Cheng-Wei 黃正瑋 |
spellingShingle |
Huang, Cheng-Wei 黃正瑋 Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
author_sort |
Huang, Cheng-Wei |
title |
Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
title_short |
Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
title_full |
Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
title_fullStr |
Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
title_full_unstemmed |
Extraction of High Power Microwave from GHz-Repetition Rate Relativistic Short Electron Pulses |
title_sort |
extraction of high power microwave from ghz-repetition rate relativistic short electron pulses |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/85773500824688243206 |
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