東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Electron-THz Wave Interactions in a ...

Snively, Emma Joyce Curry.

FindBook

Google Book

Amazon

博客來

Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser./
作者:	Snively, Emma Joyce Curry.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	175 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-07, Section: B.
Contained By:	Dissertations Abstracts International80-07B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10979579
ISBN:	9780438685307

Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser.
Snively, Emma Joyce Curry.

Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 175 p.

Source: Dissertations Abstracts International, Volume: 80-07, Section: B.

Thesis (Ph.D.)--University of California, Los Angeles, 2018.

This item must not be sold to any third party vendors.

The THz frequency regime holds the possibility of a new frontier in advanced accelerator research. In bridging the gap between optical and RF technology, THz-based accelerating structures can retain advantages from both, achieving high field gradients while maintaining large temporal acceptance relative to beam size. These features make THz radiation an exciting tool for beam manipulation, but, thus far, exploration of its application to accelerator physics has been limited by the low power of today's THz source technology, typically limited to a uJ-level pulse energy, often in a near single cycle waveform. In this dissertation, we present a guiding technique for phase and group velocity matched interaction between a near single cycle THz pulse and an electron beam copropagating in a magnetic undulator. This "zero-slippage" scheme results in efficient energy exchange, necessary for utilizing a low power THz source, and in extended interaction, necessary for harnessing short and intense THz pulses, along with unique features like broadband coupling and tunable resonance that stem from the waveguide-induced dispersion. We explore the applications of "zero-slippage" coupling in an inverse free electron laser (IFEL), for THz-driven acceleration and beam manipulation, and a free electron laser (FEL), for broadband THz amplification or a stand-alone THz source based on spontaneous superradiance. To model this novel interaction regime, we developed a 1-dimensional FEL simulation tool that tracks the THz pulse undergoing dispersion in a waveguide, along with the longitudinal phase space dynamics of the beam. The experimental work presented in this dissertation includes a THz IFEL and FEL experiment, both conducted on the PEGASUS beamline at UCLA using a 30 cm, planar, permanent magnet undulator and 1 μJ-level laser-based THz source. The THz IFEL experiment produced a record 150 keV energy modulation of the relativistic beam, verified the tunable resonance of the guided IFEL interaction, and provided longitudinal phase space measurements demonstrating potential applications of the technique, including bunch compression by a factor of two. Measurements from the THz FEL experiment show evidence of both stimulated amplification/absorption of the THz seed pulse, and spontaneous superradiant emission, due to the short bunch length relative to THz wavelength after bunch compression driven by the PEGASUS linac. Extrapolating to a 100-200 pC beam in a tapered undulator, simulations predict corresponding THz outputs exceeding 100 μJ with up to 30 % beam energy extraction, from broadband amplification with a long beam or spontaneous superradiance from a short beam, inviting the development of exciting and competitive new THz sources using the "zero-slippage" FEL technology.

ISBN: 9780438685307Subjects--Topical Terms:

516296
Physics.

Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser.
LDR:03914nmm a2200337 4500 001 2210631
005 20191121124249.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780438685307
035 $a (MiAaPQ)AAI10979579
035 $a (MiAaPQ)ucla:17369
035 $a AAI10979579
040 $a MiAaPQ $c MiAaPQ
100 1 $a Snively, Emma Joyce Curry. $3 3437771
245 1 0 $a Electron-THz Wave Interactions in a Guided Inverse Free Electron Laser.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 175 p.
500 $a Source: Dissertations Abstracts International, Volume: 80-07, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Musumeci, Pietro.
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 2018.
506 $a This item must not be sold to any third party vendors.
520 $a The THz frequency regime holds the possibility of a new frontier in advanced accelerator research. In bridging the gap between optical and RF technology, THz-based accelerating structures can retain advantages from both, achieving high field gradients while maintaining large temporal acceptance relative to beam size. These features make THz radiation an exciting tool for beam manipulation, but, thus far, exploration of its application to accelerator physics has been limited by the low power of today's THz source technology, typically limited to a uJ-level pulse energy, often in a near single cycle waveform. In this dissertation, we present a guiding technique for phase and group velocity matched interaction between a near single cycle THz pulse and an electron beam copropagating in a magnetic undulator. This "zero-slippage" scheme results in efficient energy exchange, necessary for utilizing a low power THz source, and in extended interaction, necessary for harnessing short and intense THz pulses, along with unique features like broadband coupling and tunable resonance that stem from the waveguide-induced dispersion. We explore the applications of "zero-slippage" coupling in an inverse free electron laser (IFEL), for THz-driven acceleration and beam manipulation, and a free electron laser (FEL), for broadband THz amplification or a stand-alone THz source based on spontaneous superradiance. To model this novel interaction regime, we developed a 1-dimensional FEL simulation tool that tracks the THz pulse undergoing dispersion in a waveguide, along with the longitudinal phase space dynamics of the beam. The experimental work presented in this dissertation includes a THz IFEL and FEL experiment, both conducted on the PEGASUS beamline at UCLA using a 30 cm, planar, permanent magnet undulator and 1 μJ-level laser-based THz source. The THz IFEL experiment produced a record 150 keV energy modulation of the relativistic beam, verified the tunable resonance of the guided IFEL interaction, and provided longitudinal phase space measurements demonstrating potential applications of the technique, including bunch compression by a factor of two. Measurements from the THz FEL experiment show evidence of both stimulated amplification/absorption of the THz seed pulse, and spontaneous superradiant emission, due to the short bunch length relative to THz wavelength after bunch compression driven by the PEGASUS linac. Extrapolating to a 100-200 pC beam in a tapered undulator, simulations predict corresponding THz outputs exceeding 100 μJ with up to 30 % beam energy extraction, from broadband amplification with a long beam or spontaneous superradiance from a short beam, inviting the development of exciting and competitive new THz sources using the "zero-slippage" FEL technology.
590 $a School code: 0031.
650 4 $a Physics. $3 516296
650 4 $a Electromagnetics. $3 3173223
650 4 $a Optics. $3 517925
690 $a 0605
690 $a 0607
690 $a 0752
710 2 $a University of California, Los Angeles. $b Physics. $3 3192579
773 0 $t Dissertations Abstracts International $g 80-07B.
790 $a 0031
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10979579