Planar Waveguide Hybrids for Very High Power RF

Nantista, C.; Fowkes, W.R.; Kroll, N.; Tantawi, Sami

doi:10.2172/784859

Cited by 11 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As is apparent from Fig. 2 [55] it is a broader band device, has significantly less misdirected power, and has a coupling of -2.96 dB as compared to the ideaI -3.01 dB and as compared to -3.19 for the ladder (at 11.424 GHz).…”

Section: And Distributionmentioning

confidence: 92%

“…The H plane 3 dB hybrid described in the proposal has been fabricated, tested, and reported in [55]. Two different versions are reported there, a two rung "ladder" configuration, and the H conllguration described in the proposal.…”

Section: And Distributionmentioning

confidence: 99%

“…lb,55] has been designed by making use of the HFSS optimization package. An ingenious symmetric combination of four of these hybrids to form a single eight port structure in a "cross potent" configuration as been…”

Section: And Distributionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical Problems in Accelerator Physics

2001

View full text Add to dashboard Cite

PHYSICSThis is the first progress report submitted since my current grant was renewed and covers progress made since the submission of the renewal proposal November 12, 1998. During I. RECENT PROGRESS ON DAMPED DETUNED ACCELERATOR STRUCTURESA historical summary of SLAC accelerator structure R&D at 11.424 GHz is given in [57]. has also included near completion of fabrication and quality control measurements for RDDS 1 and design studies for RDDS2. We discuss these items separately below. DDS3:As discussed in [38] and summarized in the second progress report of the previous grant renewal, the DDS3 design was modified from that of DDS 1 in two respects: (1) the manifold terminations were improved by redesigning the manifolds and mitered bends at the downstream end terminating all of them with better matched windows, and (2) the synchronous frequency distribution was modified so that Kdn/df rather than dnldf was Gaussian, a change intended to improve the first few meters of the wake. The same

show abstract

Section: And Distributionmentioning

confidence: 92%

Section: And Distributionmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical Problems in Accelerator Physics

2001

View full text Add to dashboard Cite

show abstract

“…Figure 5 shows a block diagram of this device. It will use discrete components, including a newly developed inline X-band phase shifter and a magic-H style SLAC hybrid coupler [7]. The hybrid coupler and the first phase shifter, with its mode converters, were recently delivered to NRL, and should be tested at high power later in 2006.…”

Section: Development Of An X-band Power Combinermentioning

confidence: 99%

Development of a 20 MeV Dielectric-Loaded Test Accelerator

Gold

Kinkead²,

Gai

et al. 2006

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. This paper presents a progress report on a joint project by the Naval Research Laboratory (NRL) and Argonne National Laboratory (ANL), in collaboration with the Stanford Linear Accelerator Center (SLAC), to develop a dielectric-loaded test accelerator in the magnicon facility at NRL. The accelerator will be powered by an experimental 11.424-GHz magnicon amplifier that presently produces 25 MW of output power in a ~250-ns pulse at up to 10 Hz. The accelerator will include a 5-MeV electron injector originally developed at the Tsinghua University in Beijing, China, and can incorporate DLA structures up to 0.5 m in length. The DLA structures are being developed by ANL, and shorter test structures fabricated from a variety of dielectric materials have undergone testing at NRL at gradients up to ~8 MV/m. SLAC has developed components to distribute the power from the two magnicon output arms to the injector and to the DLA accelerating structure with separate control of the power ratio and relative phase. RWBruce Associates, Inc., working with NRL, has investigated means to join short ceramic sections into a continuous accelerator tube by a brazing process using an intense 83-GHz beam. The installation and testing of the first dielectric-loaded test accelerator, including injector, DLA test structure, and spectrometer, should take place within the next year.

show abstract

“…A second level of power division, between each structure pair, is accomplished with hybrids of the "magic H" type [4]. Although the hybrids have double height interiors, this part of the distribution system, including bends and diagnostic directional couplers, uses standard WR90 waveguide.…”

Section: System Layoutmentioning

confidence: 99%

High-Power Rf Distribution Systemfor the 8-Pack Project

Nantista¹

2004

View full text Add to dashboard Cite

The 8-Pack Project at SLAC is a prototype rf system whose goal is to demonstrate the high-power X-band technology developed in the NLC/GLC (Next/Global Linear Collider) program. In its first phase, it has reliably produced a 400 ns rf pulse of over 500 MW using a solidstate modulator, four 11.424 GHz klystrons and a dualmoded SLED-II pulse compressor [1]. In Phase 2, the output power of our system has been delivered into the bunker of the NLCTA (Next Linear Collider Test Accelerator) and divided between several accelerator structures for beam acceleration. We describe here the design, cold-test measurements, and processing of this power distribution system. Due to the high power levels and the need for efficiency, overmoded waveguide and components are used. For power transport, the TE 01 mode is used in 7.44 cm and 4.064 cm diameter circular waveguide. Only near the structures is standard WR90 rectangular waveguide employed. Components used to manipulate the rf power include transitional tapers, mode converters, overmoded bends, fractional directional couplers, and hybrids.

show abstract

Planar Waveguide Hybrids for Very High Power RF

Cited by 11 publications

References 3 publications

Theoretical Problems in Accelerator Physics

Theoretical Problems in Accelerator Physics

Development of a 20 MeV Dielectric-Loaded Test Accelerator

High-Power Rf Distribution Systemfor the 8-Pack Project

Contact Info

Product

Resources

About