PAC2013 - List of Authors (Doran, D.S.)

Paper	Title	Page
WEPMA08	Tuning, Conditioning, and Dark Current Measurements of the 1300 MHz NCRF Cavities at Argonne Wakefield Accelerator (AWA) Facility	996
	J.G. Power, M.E. Conde, D.S. Doran, W. Gai, C.-J. Jing ANL, Argonne, USA C.-J. Jing Euclid TechLabs, LLC, Solon, Ohio, USA E.E. Wisniewski Illinois Institute of Technology, Chicago, Illinois, USA
	Six normal-conducting, L-band rf cavities have recently been commissioned as part of the upgrade to the AWA facility . The cavity design is a seven-cell, standing-wave, 1300 MHz cavity made with OFE copper and was reported on earlier . In this paper, we present data on: (i) tuning and balancing; (ii) high-power rf conditioning; and (iii) dark current measurements; of the cavities. All six cavities were tuned to 1300 MHz and were balanced to >96% in all cells. They are designed to operate with 10 MW of rf input power but were conditioned beyond this operating point to insure low dark current during operation. During rf conditioning, we recorded the arcing history to better understand the overall conditioning time and the final breakdown rate. Finally, dark current measurements were used to measure the cavity’s surface field enhancement factor, “beta” throughout rf conditioning to record how the condition of the surface evolved during rf conditioning. M.E. Conde et al., see these proceedings. ** J.G. Power et al., in proceedings of IPAC 2010

Paper

Title

Page

Tuning, Conditioning, and Dark Current Measurements of the 1300 MHz NCRF Cavities at Argonne Wakefield Accelerator (AWA) Facility

996

J.G. Power, M.E. Conde, D.S. Doran, W. Gai, C.-J. Jing
ANL, Argonne, USA
C.-J. Jing
Euclid TechLabs, LLC, Solon, Ohio, USA
E.E. Wisniewski
Illinois Institute of Technology, Chicago, Illinois, USA

Six normal-conducting, L-band rf cavities have recently been commissioned as part of the upgrade to the AWA facility *. The cavity design is a seven-cell, standing-wave, 1300 MHz cavity made with OFE copper and was reported on earlier **. In this paper, we present data on: (i) tuning and balancing; (ii) high-power rf conditioning; and (iii) dark current measurements; of the cavities. All six cavities were tuned to 1300 MHz and were balanced to >96% in all cells. They are designed to operate with 10 MW of rf input power but were conditioned beyond this operating point to insure low dark current during operation. During rf conditioning, we recorded the arcing history to better understand the overall conditioning time and the final breakdown rate. Finally, dark current measurements were used to measure the cavity’s surface field enhancement factor, “beta” throughout rf conditioning to record how the condition of the surface evolved during rf conditioning.
* M.E. Conde et al., see these proceedings.
** J.G. Power et al., in proceedings of IPAC 2010