Development of Dielectric-Based High Gradient Accelerating Structures

Journal Article · Mon Nov 27 00:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2409150· OSTI ID:20898687

Jing, C ^[1]; Gai, W; Konecny, R; Power, J; Liu, W ^[2]; Gold, S H ^[3]; Kinkead, A K ^[4]; Kanareykin, A ^[1]; Kazakov, S ^[5]

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1. Euclid Techlabs, LLC, 5900 Harper Rd, Solon, OH-44139 (United States)
2. High Energy Physics Division, Argonne National Laboratory, Argonne, IL-60439 (United States)
3. Plasma Physics Division, Naval Research Laboratory, Washington DC, 20375 (United States)
4. LET Corp., Washington DC, 20007 (United States)
5. KEK, Tsukuba (Japan)

High gradient accelerating structures using dielectric-lined circular waveguides have been developed for a number of years at Argonne National Laboratory. In this article, we first report the experimental results of high power rf testing on the quartz based Dielectric-Loaded Accelerating (DLA) structure carried out on Feb. 2006 at the Naval Research Laboratory. The motivation for this experiment is to test the multipactor effect on different materials under high power and high vacuum condition. Up to 12 MW pulsed rf went through the tube without breakdown. Multipactor appeared during the experiment but with different features compared to other materials like alumina. Photomultiplier Tube (PMT) measurements were introduced into the experiment for the first time to observe the light emission time and intensity. In the second part of this paper, ways to achieve higher gradient for DLA structures are proposed: 1) smaller ID and longitudinal gap free DLA structures to reduce multipactor and obtain higher gradient; 2) new coaxial type coupler to avoid dielectric gap and improve impedance matching; 3) double layered DLA structure to reduce rf loss and enhance shunt impedance as well.

• OSTI ID: 20898687
• Journal Information: AIP Conference Proceedings, Vol. 877, Issue 1; Conference: 12. advanced accelerator concepts workshop, Lake Geneva, WI (United States), 10-15 Jul 2006; Other Information: DOI: 10.1063/1.2409150; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALUMINIUM OXIDES
ANL
DIELECTRIC MATERIALS
IMPEDANCE
NAVAL RESEARCH LABORATORY
PHOTOMULTIPLIERS
QUARTZ
RF SYSTEMS
WAVEGUIDES