RF Conditioning and Testing of Fundamental Power Couplers for SNS Superconducting Cavity Production

Stirbet, M.; Wilson, Katherine; Wiseman, M.; Henry, James; Drury, M.; Davis, G.; Grenoble, Christiana; Powers, T.; Myneni, Ganapati Rao; Campisi, I.E.; Kang, Y.; Stout, D.

doi:10.1109/pac.2005.1591741

Cited by 14 publications

(13 citation statements)

References 6 publications

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“…Operation with 50 K helium gas in lieu of liquid nitrogen would further decrease the helium load. The couplers were conditioned prior to installation onto the cavities, following procedures similar to those used for the SNS couplers [34].…”

Section: Input Couplermentioning

confidence: 99%

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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A 6-cell 805 MHz superconducting cavity for acceleration in the velocity range of about 0.4 to 0.53 times the speed of light was designed. After single-cell prototyping, three 6-cell niobium cavities were fabricated. In vertical RF tests of the 6-cell cavities, the measured quality factors (Q 0 ) were between 7 · 10 9 and 1.4 · 10 10 at the design field (accelerating gradient of 8 to 10 MV/m). A rectangular cryomodule was designed to house 4 cavities per cryomodule. The 4-cavity cryomodule could be used for acceleration of ions in a linear accelerator, with focussing elements between the cryomodules. A prototype cryomodule was fabricated to test 2 cavities under realistic operating conditions. Two of the 6-cell cavities were equipped with helium tanks, tuners, and input coupler and installed into the cryomodule. The prototype cryomodule was used to verify alignment, electromagnetic performance, frequency tuning, cryogenic performance, low-level RF control, and control of microphonics.

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Section: Input Couplermentioning

confidence: 99%

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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“…The outer co-ax of the air side is made from copper plated stainless steel, while the inner co-ax is made from high purity copper, cooled by water. The alumina ceramic disk window is TiN coated EU contract number RII3CT-2003-506395 CARE Conf-05-045-SRF co-axial parts to allow D.C. bias to be applied as an antimultipactor measure [4]. The SNS power couplers have all been successfully tested to 1 MW peak power in travelling wave mode and 500 kW under full reflection.…”

Section: The Sns Couplermentioning

confidence: 99%

The design and performance of CW and pulsed power couplers—A review

Garvey

2006

Physica C: Superconductivity

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The design of input power couplers represents one of the most important challenges of accelerators that use super-conducting RF technology. These devices must fulfil several functions while being subject to mechanical, electromagnetic, vacuum and cryogenic constraints. The rapidly increasing number of projects, planned or under construction, which propose to use super-conducting cavities has prompted developments in power couplers for both CW and pulsed applications. Amongst the projects for which couplers have, or are being, developed one finds VUV and X-ray free electron lasers (based on self-amplified spontaneous emission), spallation neutron sources (SNS), energy recovery linacs, and high energy colliders. We will review the design requirements and performances obtained for several of these couplers. Particular attention will be paid to the couplers which have been used on the TESLA Test Facility at DESY, the variations of this coupler which are under consideration for future synchrotron light sources and the coupler chosen for use on the SNS. AbstractThe design of input power couplers represents one of the most important challenges of accelerators that use super-conducting RF technology. These devices must fulfil several functions while being subject to mechanical, electromagnetic, vacuum and cryogenic constraints. The rapidly increasing number of projects, planned or under construction, which propose to use super-conducting cavities has prompted developments in power couplers for both CW and pulsed applications. Amongst the projects for which couplers have, or are being, developed one finds VUV and X-ray free electron lasers (based on selfamplified spontaneous emission), spallation neutron sources (SNS), energy recovery linacs, and high energy colliders. We will review the design requirements and performances obtained for several of these couplers. Particular attention will be paid to the couplers which have been used on the TESLA Test Facility at DESY, the variations of this coupler which are under consideration for future synchrotron light sources and the coupler chosen for use on the SNS.

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“…The cryogenic system is designed for 2.4 kW of power at 2.1 o K, which ensures a comfortable margin of operation over the static and dynamic losses of all the cavities in the present configuration [14], and also for a possible machine power upgrade which would include an additional 36 high-beta cavities (9 cryomodules). Each of the 81 superconducting cavities is powered by a pulsed 550 kW klystron via a power coupler [15], [16].…”

Section: Superconducting Linacmentioning

confidence: 99%

SNS machine status report

Plum

2006

Nuclear Physics B - Proceedings Supplements

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RF Conditioning and Testing of Fundamental Power Couplers for SNS Superconducting Cavity Production

Cited by 14 publications

References 6 publications

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

The design and performance of CW and pulsed power couplers—A review

SNS machine status report

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