J. Knobloch
Cornell University
5 Papers
32 Citations
J. Knobloch is an academic researcher from Cornell University. The author has contributed to research in topics: Field electron emission & Beam (structure). The author has an hindex of 3, co-authored 5 publications.
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Papers
Microscopic investigation of high gradient superconducting cavities after reduction of field emission
TL;DR: In this article, the authors showed that high power RF processing (HPP) is an effective technique to reduce field emission in superconducting cavities, so higher accelerating gradients can be reached.
20
Commissioning of the superconducting RF cavities for the CESR Luminosity Upgrade
Sergey Belomestnykh,P. Barnes,E. Chojnacki,R. Ehrlich,R.L. Geng,D. L. Hartill,R. Kaplan,J. Knobloch,E. Nordberg,Hasan Padamsee,S. Peck,P. Quigley,J. Reilley,Donald B. Rubin,J. Sears,V. Veshcherevich +15 more
- 27 Mar 1999
TL;DR: In this article, the authors describe the commissioning of the first three accelerating modules of a superconducting RF system consisting of four single-cell cavity modules, which is an important part of the CESR Luminosity Upgrade.
Beam test of a superconducting cavity for the CESR luminosity upgrade
Hasan Padamsee,P. Barnes,Sergey Belomestnykh,Karl Berkelman,M.G. Billing,R. Ehrlich,G. Flynn,Z. Greenwald,W. Hartung,T. Hays,S. Henderson,R. Kaplan,J. Kirchgessner,J. Knobloch,D. Moffat,H. Muller,E. Nordberg,S. Peck,M. Pisharody,J. Reilly,J. Rogers,D. H. Rice,Donald B. Rubin,David Sagan,J. Sears,Maury Tigner,J. Welch +26 more
- 01 May 1995
TL;DR: The prototype superconducting cavity system for CESR-Phase III was tested in CESR in August 1994 as mentioned in this paper, and a maximum of 155 kW of rf power was transferred to a 120 mA beam.
10
Microscopic examination of defects located by thermometry in 1.5 GHz superconducting niobium cavities
J. Knobloch,R. Durand,H. Muller,Hasan Padamsee +3 more
- 01 May 1995
TL;DR: In this article, the authors present a survey of the topographical and elemental properties of anomalous loss regions in 1.5 GHz superconducting Nb cavities in superfluid He.
Microscopic investigation of RF surfaces of 3 GHz niobium accelerator cavities following RF processing
J. Graber,P. Barnes,T. Flynn,J. Kirchgessner,J. Knobloch,D. Moffat,H. Muller,H. Padamsee,J. Sears +8 more
- 17 May 1993
TL;DR: In this paper, the authors examined the RF surfaces of several single-cell 3 GHz cavities, following RF processing, in a scanning electron microscope (SEM), and found that the changes in the electron field emission (FE) characteristics of the RF surface were correlated with changes in thermometer signals.