NDLI: Beam test of a superconducting cavity for the CESR luminosity upgrade

Content Provider	IEEE Xplore Digital Library
Author	Padamsee, H. Barnes, P. Belomestnykh, S. Berkelman, K. Billing, M. Ehrlich, R. Flynn, G. Greenwald, Z. Hartung, W. Hays, T. Henderson, S. Kaplan, R. Kirchgessner, J. Knobloch, J. Moffat, D. Muller, H. Nordberg, E. Peck, S. Pisharody, M. Reilly, J. Rogers, J. Rice, D. Rubin, D. Sagan, D. Sears, J. Tigner, M. Welch, J.
Copyright Year	1995
Description	Author affiliation: Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA (Padamsee, H.; Barnes, P.; Belomestnykh, S.; Berkelman, K.; Billing, M.; Ehrlich, R.; Flynn, G.; Greenwald, Z.; Hartung, W.; Hays, T.; Henderson, S.; Kaplan, R.; Kirchgessner, J.; Knobloch, J.; Moffat, D.; Muller, H.; Nordberg, E.; Peck, S.; Pisharody, M.; Reilly, J.; Rogers, J.; Rice, D.; Rubin, D.; Sagan, D.; Sears, J.; Tigner, M.; Welch, J.)
Abstract	The prototype superconducting cavity system for CESR-Phase III was tested in CESR in August 1994. The performance of the system was very gratifying. The cavity operated gradients of 4.5-6 MV/m and accelerated beam currents up to 220 mA. This current is a factor of 3 above the world record 67 mA for SRF[1]. The high circulating beam current did not increase the heat load or present any danger to the cavity. No instability attributable to the SRF cavity was encountered. A maximum of 155 kW of rf power was transferred to a 120 mA beam. The window was subjected to 125 kW reflected power and processed easily. In the travelling wave mode, vacuum bursts and are trips prevented us from going above 165 kW. The maximum HOM power extracted was 2 kW. Beam stability studies were conducted for a variety of bunch configurations. In other tests a 120 mA beam was bumped horizontally and vertically by /spl plusmn/10 mm. While supporting a 100 mA beam, the cavity was axially deformed with the tuner by 0.4 mm to sweep the HOM frequencies across dangerous revolution harmonics. In all such tests, no resonant excitation of HOMs or beam instabilities were observed, which confirms that the potentially dangerous modes were damped strongly enough to be rendered harmless.
Starting Page	1515
Ending Page	1517
File Size	339504
Page Count	3
File Format	PDF
ISBN	0780329341
DOI	10.1109/PAC.1995.505270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	System testing Impedance Laser excitation Refrigeration Tuners Superconducting magnets Ferrites Optical coupling Strontium Bismuth
Content Type	Text
Resource Type	Article

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Beam Test of a Superconducting Cavity for the CESR Luminosity Upgrade*

Beam test of a superconducting cavity for the cesr luminosity upgrade * (0).

Beam Test of a Superconducting Cavity for the CESR Luminosity Upgrade * (0)

Beam Test of a Superconducting Cavity for the CESR Luminosity Upgrade

Development of superconducting rf for cesr*.

Conceptual design of a vacuum system for a compact, high luminosity CESR upgrade

The superconducting interaction region magnet system for the CESR phase III upgrade

Comparison of the Predicted and Measured Loss Factor of the Superconducting

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