Peter Kneisel Senior Staff Scientist

Contact:

• Center for Advanced Studies of Accelerators
  Thomas Jefferson National Accelerator Facility
  12000 Jefferson Avenue, Newport News, VA 23606
• 757-269-7646 (phone)
  757-269-7658 (fax)
• kneisel@jlab.org

Education:

• B.S. Physics 1963, Technische Hochschule Darmstadt, Germany
• M.S. Physics 1966, Technische Hochschule Darmstadt, Germany
• Ph.D. Physics 1972, Universitaet Karlsruhe, Germany

Career:

• Research Physicist at Kernforschungszentrum Karlsruhe, 1967 – 1973
• Visiting Research Physicist at High Energy Physics Laboratory, Stanford University, 1973-1974
• Senior Research Physicist at Kernforschungszentrum Karlsruhe, 1974-1978
• Senior Research Associate at Laboratory for Nuclear Studies, Cornell University, 1978 – 1979
• Senior Research Physicist at Kernforschungszentrum Karlsruhe, 1979-1981 Visiting Physicist at KEK for 2 ½ months
• Senior Research Associate at Laboratory for Nuclear Studies, Cornell University, 1981-1987
• Senior Staff Scientist at Jlab, 1987 – present

Areas of Interest/Experience:

• SRF Technology – R&D and Production , Fabrication Technology, Material Studies, Surface Science , Accelerator and Separator Structures, Vacuum Technology, Development of Facilities and Procedures for sc Cavities, Cryogenics

Selected Recent Publications

• P.Kneisel, O.Stoltz, J.Halbritter; "On Surface Preparation and Measurement of Niobium used in High Frequency" Cavities, J. Appl. Phys. 45, 2296 (1974)
• C.M.Lyneis,P.Kneisel,O.Stoltz,J.Halbritter; "On the Role of Electrons in RF-Breakdown", IEEE Trans.Mag.,MAG-11(2),417 (1975)
• P.Kneisel,O.Stoltz,J.Halbritter; "NB₃Sn for Superconducting RF-Cavities", Adv. in Cryogenic Eng. 22,341 (1976)
• P.Kneisel, H.Padamsee; "Modification of the Muffin Tin Cavity Shape to eliminate Multipacting" CLNS-Report 79/433, Cornell University
• P.Kneisel,R.Vincon,J.Halbritter; "First Results on Elliptically Shaped Cavities" Nucl.Instr.& Meth. 188, 669 (1981)
• P.Kneisel et al.; "Development of Superconducting Cavities of Cylindrical Shape at Cornell" IEEE Trans.Nucl.Sci., NS-30,3348 (1983)
• G.Müller, P.Kneisel; "Development of Sensitive Thermometers for Calibrated Surface Temperature Measurements of Niobium Cavities Immersed in Superfluid Helium", Report SRF-851201EX, Lab.Nucl.Studies, Cornell Univ. (1985)
• P.Kneisel;"Test of Superconducting Accelerator Structures in a Closed Vacuum System" Proc. 1987 Part.Acc.Conf., p.1893, Washington, DC (1987)
• P.Kneisel;"Use of the Titanium Solid State Gettering Process for the Improvement of the Performance of Superconducting RF-Cavities", Journ.Less Comm.Metals 139, 179 (1988)
• P.Kneisel, J.Mammosser, G.Rao, K.Saito, R.Sundelin; "Performance of Superconducting Cavities for CEBAF" Proc. 1991 IEEE Part. Acc. Conf., Vol. 4 , p.2384 (1991)
• P.Kneisel, B.Lewis, L.Turlington; "Experience with High Pressure Ultrapure Water Rinsing of Niobium Cavities" Proc. 6th Workshop on Rf-Superconductivity (CEBAF), p.628 (1994)
• P.Kneisel, R.W.Roeth, H.G.Kuerschner "Results from a nearly ‘Defect-free’ Niobium Cavity " CEBAF TN # 95-076 and Proc. 7th SRF - Workshop, p.449, Saclay (1995)
• P. Kneisel, J. Brawley, L. Turlington; "Results from the first 7-cell Cavity for the CEBAF Upgrade", CEBAF TN 98-019, 1998
• P. Kneisel, V. Palmieri "Development of Seamless Cavities for Accelerator Application" Proc. 1999 Particle Accelerator Conference, New York 1999
• P. Kneisel "Preliminary Experience with ‘In-situ’ baking of Niobium Cavities" Proc. 9th Workshop on RF Superconductivity, Santa Fe (1999), p. 328
• G. Ciovati, P. Kneisel et al "Superconducting Prototype Cavities for the Spallation Neutron Source (SNS) Project" Proc. 2001 Part. Acc. Conf., Chicago (2001),
• W. Singer, I. Gonin*, I. Jelezov*, H. Kaiser, T. Khabibuline*, P. Kneisel**, K. Saito***, and X. Singer; "Hydro forming of TESLA cavities at DESY" Proc. 10th Workshop on RF Superconductivity, Tsukuba (2001), to be published
• P. Kneisel "Is there an alternative to the present upgrade scenario?", JLab-TN-01-013, (2001)
• D. Barni, C. Ciovati, P. Kneisel, J. Sekutowicz "An Improved Cavity Design for the CEBAF Upgrade", JLab-TN-01-15, (2001)

(and complete list of papers)

Seminars and Conference Presentations

• "RF - Superconductivity " Invited Talk presented at the AIP Conference in Madison, 1986, published in Advanced Accelerator Concepts , AIP Conf. Proc. 156 , 145 (1986)
• "RF-Superconductivity Technology - Its Sensitivity to Surface Conditions " Invited Talk at the 1993 Vacuum Society Meeting in Chicago, published in J.Vac.Sci.Technol. A11(4) ,(1993)
• “Contamination Issues in SRF Technology” Invited Talk at the Contamination Workshop at Jlab 1997, published in Proc. Contamination Workshop at CEBAF (1997), Vol. 2
• “Superconducting Radio Frequency Technology: Understanding and Improvements of Limitations through Application of Cryogenic Instrumentation” Invited Talk at CEC/ICMC Conference in Portland 1996, published in Adv. in Cryogenic Eng. 43 (1997)
• “High Gradient Superconducting Cavities - A Review of the Present Status” Invited Talk at the Appl.Supercond. Conf. in Palm Desert 1998, published in Proc. Appl. Superconductivity Conf. 1998 ; CEBAF TN 98-044, 1998
• “Fundamental Aspects of SC Cavity Performance” Invited Talk at Snowmass 2001
• “State of the Art of Multicell SC Cavities and Perspectives” Invited Talk at EPAC 2002, Paris
• Several Invited talks at SRF Workshops

(and complete list of presentations)

Honors

• Virginia Governor’s Distinguished Scientist