Contribution to a conference proceedings/Contribution to a book

PUBDB-2023-02097

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Numerical Design of a Compact TE11-to-TM01 Mode Converter for THz-driven Electron Acceleration

Kellermeier, M. (Corresponding author)DESY* ; Assmann, R.DESY* ; Vinatier, T.DESY* ; Hillert, W.CFEL*Extern*

2023
JACoW Publishing Geneva, Switzerland
ISBN: 978-3-95450-231-8

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Please use a persistent id in citations: doi:10.18429/JACOW-IPAC2023-WEPA113  doi:10.3204/PUBDB-2023-02097

Abstract: In recent years the generation of high power millimeter wave and Terahertz radiation has progressed substantially, enabling electron beam manipulation and acceleration in structures with a footprint of several centimeters. However, in many experiments the external driving pulse is coupled collinearly into the waveguide structure which increases the coupling footprint relative to the wavelength tremendously(≈30 𝜆 or more) in comparison to conventional structures(≈1 𝜆 or less). Here, the design of a double-bend mode con-verter for 300 GHz is presented which converts the fundamental TE11 mode quasi-instantaneously to the TM01 mode for the accelerating structure. In comparison to an s-shaped converter, the present design makes an additional waveguide bend obsolete. The structure length along the beam axis is only 4 mm (4 𝜆), showing a major advance in compactness. Combined with a horn antenna for free-space to waveguide coupling, the maximum power coupled into the structure reaches 83 %, while the collinear scheme does not exceed 74 %.

Keyword(s): Accelerator Physics ; mc7-accelerator-technology-and-sustainability - MC7: Accelerator Technology and Sustainability ; mc7-t06-room-temperature-rf - MC7.T06: Room Temperature RF

Note: Literaturangaben;

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Contributing Institute(s):

1. Beschleunigerphysik Fachgruppe MPY1 (MPY1)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. TWAC - THz Wave Accelerating Cavity for ultrafast science (101046504) (101046504)
3. AXSIS - Frontiers in Attosecond X-ray Science: Imaging and Spectroscopy (609920) (609920)

Experiment(s):

1. Accelerator Research Experiment at SINBAD
2. AXSIS: Frontiers in Attosecond X-ray Science, Imaging and Spectroscopy

Appears in the scientific report 2023

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Database coverage:
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