SRF2015 - List of Authors (Kaabi, W.)

Paper	Title	Page
THBA03	Overview of Recent Advances in Coupler Technology, Fabrication and Conditioning
	W. Kaabi LAL, Orsay, France
	The talk will provide an overview on the latest advances (since SRF2013) of Power Coupler development, production and preparation for SRF applications. The speaker is asked to emphasize issues of design, fabrication and conditioning. Examples from other labs (FRIB, SPIRAL-II, ESS, LCLS-II) should be given that help explain the issues and resolutions including the multipacting free coupler at FRIB and the copper free coupler at FNAL. Details of the speaker's own work with the large scale production of power couplers for XFEL are expected but should occupy <=50% of the talk.
	Slides THBA03 [14.515 MB]
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THPB083	Energetic Copper Coating on Stainless Steel Power Couplers for SRF Application	1330
	I. Irfan, S.F. Chapman, M. Krishnan, K.M. Velas AASC, San Leandro, California, USA W. Kaabi LAL, Orsay, France
	Funding: This research is supported by the US DOE via and SBIR grant: DE-SC0009581 Delivering RF power from the outside (at room temperature) to the inside of SRF cavities (at ~4 K temperature), requires a power coupler to be thermally isolating, while still electrically conducting on the inside. Stainless steel parts that are coated on the insides with a few skin depths of copper can meet these conflicting requirements. The challenge has been the adhesion strength of copper coating on stainless steel coupler parts when using electroplating methods. These methods also require a nickel flash layer that is magnetic and can therefore pose problems. Alameda Applied Sciences Corporation (AASC) uses Coaxial Energetic Deposition (CED) from a cathodic arc plasma to grow copper films directly on stainless steel coupler parts with no Ni layer and no electrochemistry. The vacuum arc plasma consists of ~100 eV Cu ions that penetrate a few monolayers into the stainless steel substrate to promote growth of highly adhesive films with crystalline structure. Adhesion strength and coating quality of copper coatings on complex stainless steel tubes, bellows, mock coupler parts and an actual Tesla Test Facility (TTF) type coupler part, are discussed. * Adhesion and Cu quality testing were done for us by the Fermilab Technical Division, Superconducting RF Development Department
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THPB094	Status of the Fundamental Power Coupler Production for the European XFEL Accelerator	1364
	S. Sierra, G. Garcin, C. Lievin, G. Vignette TED, Thonon, France A. Gallas, W. Kaabi LAL, Orsay, France M. Knaak, M. Pekeler, L. Zweibaeumer RI Research Instruments GmbH, Bergisch Gladbach, Germany
	For the XFEL accelerator, Thales, RI Research Instrument and LAL are working on the manufacturing, assembly and conditioning of fundamental power couplers. 670 couplers have to be manufactured according to strict specifications. The paper describes the full production activity from the program starting to the currentphase with main measurements for the coupler characteristic: copper and TiN coating characteristics. The status of the production is given with an output rate of 8 couplers per week. The status for more than 500 couplers manufactured and conditionned is presented.
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THPB095	Automatic RF Conditioning Test Bench of Fundamental Power Couplers for the European XFEL Accelerator	1367
	S. Sierra, C. Lievin, P. Rouillon TED, Velizy-Villacoublay, France H. Guler, W. Kaabi, A. Verguet LAL, Orsay, France
	In order to perform the RF conditioning of the fundamental coupler for the XFEL accelerator, Thales and LAL developed together a test bench being able to make the automatic RF conditioning. The capability of this test bench is of 4 pairs of coupler at the same time with automatic sequences of increasing the RF power. The test bench is composed of the overall RF station providing up to 5 MW peak power at 1.3 GHz. The waveguide distribution allows 4 individual RF lines for conditionning,and the automatic sequence applied to the couplers in respect with all signals monitored and controlled during the RF process. The paper will also provide some examples of such process.
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THPB102	RF Conditioning of the XFEL Power Couplers at the Industrial Scale	1387
	H. Guler, A. Gallas, W. Kaabi, D.J.M. Le Pinvidic, C. Magueur, M. Oublaid, A. Thiebault, A. Verguet LAL, Orsay, France
	LAL has in charge the production monitoring and the RF conditioning of 800 power couplers to equip 100 XFEL cryomodules. The conditioning process and all the preceding preparation steps are performed in a 70m2 clean room. This infrastructure, its equipment and the RF station are designed to allow the treatment of 8 couplers in the same time, after a ramp-up phase. Clean room process and conditioning results are presented and discussed.
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Paper

Title

Page

THBA03

Overview of Recent Advances in Coupler Technology, Fabrication and Conditioning

W. Kaabi
LAL, Orsay, France

The talk will provide an overview on the latest advances (since SRF2013) of Power Coupler development, production and preparation for SRF applications. The speaker is asked to emphasize issues of design, fabrication and conditioning. Examples from other labs (FRIB, SPIRAL-II, ESS, LCLS-II) should be given that help explain the issues and resolutions including the multipacting free coupler at FRIB and the copper free coupler at FNAL. Details of the speaker's own work with the large scale production of power couplers for XFEL are expected but should occupy <=50% of the talk.

Slides THBA03 [14.515 MB]

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB083

Energetic Copper Coating on Stainless Steel Power Couplers for SRF Application

1330

I. Irfan, S.F. Chapman, M. Krishnan, K.M. Velas
AASC, San Leandro, California, USA
W. Kaabi
LAL, Orsay, France

Funding: This research is supported by the US DOE via and SBIR grant: DE-SC0009581
Delivering RF power from the outside (at room temperature) to the inside of SRF cavities (at ~4 K temperature), requires a power coupler to be thermally isolating, while still electrically conducting on the inside. Stainless steel parts that are coated on the insides with a few skin depths of copper can meet these conflicting requirements. The challenge has been the adhesion strength of copper coating on stainless steel coupler parts when using electroplating methods. These methods also require a nickel flash layer that is magnetic and can therefore pose problems. Alameda Applied Sciences Corporation (AASC) uses Coaxial Energetic Deposition (CED) from a cathodic arc plasma to grow copper films directly on stainless steel coupler parts with no Ni layer and no electrochemistry. The vacuum arc plasma consists of ~100 eV Cu ions that penetrate a few monolayers into the stainless steel substrate to promote growth of highly adhesive films with crystalline structure. Adhesion strength and coating quality of copper coatings on complex stainless steel tubes, bellows, mock coupler parts and an actual Tesla Test Facility (TTF) type coupler part, are discussed.
* Adhesion and Cu quality testing were done for us by the Fermilab Technical Division, Superconducting RF Development Department

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB094

Status of the Fundamental Power Coupler Production for the European XFEL Accelerator

1364

S. Sierra, G. Garcin, C. Lievin, G. Vignette
TED, Thonon, France
A. Gallas, W. Kaabi
LAL, Orsay, France
M. Knaak, M. Pekeler, L. Zweibaeumer
RI Research Instruments GmbH, Bergisch Gladbach, Germany

For the XFEL accelerator, Thales, RI Research Instrument and LAL are working on the manufacturing, assembly and conditioning of fundamental power couplers. 670 couplers have to be manufactured according to strict specifications. The paper describes the full production activity from the program starting to the currentphase with main measurements for the coupler characteristic: copper and TiN coating characteristics. The status of the production is given with an output rate of 8 couplers per week. The status for more than 500 couplers manufactured and conditionned is presented.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB095

Automatic RF Conditioning Test Bench of Fundamental Power Couplers for the European XFEL Accelerator

1367

S. Sierra, C. Lievin, P. Rouillon
TED, Velizy-Villacoublay, France
H. Guler, W. Kaabi, A. Verguet
LAL, Orsay, France

In order to perform the RF conditioning of the fundamental coupler for the XFEL accelerator, Thales and LAL developed together a test bench being able to make the automatic RF conditioning. The capability of this test bench is of 4 pairs of coupler at the same time with automatic sequences of increasing the RF power. The test bench is composed of the overall RF station providing up to 5 MW peak power at 1.3 GHz. The waveguide distribution allows 4 individual RF lines for conditionning,and the automatic sequence applied to the couplers in respect with all signals monitored and controlled during the RF process. The paper will also provide some examples of such process.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB102

RF Conditioning of the XFEL Power Couplers at the Industrial Scale

1387

H. Guler, A. Gallas, W. Kaabi, D.J.M. Le Pinvidic, C. Magueur, M. Oublaid, A. Thiebault, A. Verguet
LAL, Orsay, France

LAL has in charge the production monitoring and the RF conditioning of 800 power couplers to equip 100 XFEL cryomodules. The conditioning process and all the preceding preparation steps are performed in a 70m2 clean room. This infrastructure, its equipment and the RF station are designed to allow the treatment of 8 couplers in the same time, after a ramp-up phase. Clean room process and conditioning results are presented and discussed.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)