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Leadership Team

Curriculum Vitae

Dr. Christoph Leemann Dr. Christoph W. Leemann
Thomas Jefferson National Accelerator Facility
12000 Jefferson Avenue
Newport News, Virginia 23606
(757) 269-7553

EDUCATION

1969 Universität Basel, Switzerland, Ph.D. in Experimental Nuclear Physics
1962 Universität Basel, Switzerland, B.S. equivalent in Experimental Physics, Theoretical Physics, Mathematics and Astronomy

PROFESSIONAL

Nov. 2001-present, Director, Thomas Jefferson National Accelerator Facility.

Enhance relationship building with the Nuclear Physics Program Office, participation in the Secretary of Energy chaired DOE Lab Directors' Meetings, interaction with SURA corporate office, participation in State and local leadership forums and guiding the Lab through a period of budgetary constraints minimizing programmatic impact.

Nov. 2000-Nov.2001, Interim Director, Thomas Jefferson National Accelerator Facility.

Successfully assumed full leadership authority and responsibilities, including Government relations, enhanced relationship building with the Nuclear Physics Program Office, participation in the Secretary of Energy chaired DOE Lab Directors' Meetings, interaction with SURA corporate office, participation in State and local Leadership forums and guiding the Lab through a period of budgetary constraints minimizing programmatic impact. Key accomplishments included hiring an Associate Director for Accelerators of International status, the successful inclusion of JLab operations funding and the construction of its 12 GeV upgrade as number 1 and 3 priorities, respectively, in the NSAC long-range plan, and the effort to increase nuclear physics funding (currently $12.5 M are added in the Senate Energy and Water Bill with report language identifying RHIC and JLab).

April-Oct., 2000, Deputy Director, Thomas Jefferson National Accelerator Facility.

Managed day-to-day operations of the Laboratory. Advanced and refined JLab's ten year strategic plan with emphasis on staffing and resource requirements. Negotiated and shaped the emerging collaboration with the Spallation Neutron Source (SNS). Secured acceptable partnership between JLab with the SNS utilizing high level of interpersonal, administrative and technical skills. Formed a search committee for a new Associate Director for Accelerators, successfully led the Laboratory through contractually mandated Science & Technology as well as Institutional Management Reviews.

1985-2000, Associate Director for Accelerators,Thomas Jefferson National Accelerator Facility.

Responsible for the development and organization of the Accelerator Division. The Division, matured from a small team dedicated to accelerator physics to utilizing the talent of over 300 employees in a multifaceted high-technology environment, involving accelerator physics, electronics surface science, cryogenics, and computer process control, as well as polarized-source development and the development of high-average-power free-electron lasers based on CEBAF's srf accelerating technology The current portfolio includes operation of the CEBAF accelerator, supporting R&D, the planned 12 GeV upgrade, the development, construction, and scientific utilization of a record-breaking infrared free electron laser (FEL), superconducting linac components and cryogenics for the SNS, and an emerging participation in RIA R&D. Noteworthy achievements include success in discharging personal responsibility as Associate Project Manager (1988-1994) for construction and installation of key accelerator systems, key technical contributions (rf separators), integration of all accelerator related R&D and operations activities with the ongoing construction, successful commissioning and operation, including key accelerator upgrades (polarized beams, energy upgraded from 4 GeV to an operational 5.7 GeV). The organizational framework for the FEL was developed and began to experience success. Personal contributions to the scientific community include participation in 1999 in the SNS Concept Optimization Committee, leading eventually to the adoption of srf technology for the SNS and JLab's participation, and the initial development of today's concept for RIA. Chaired a subcommittee to the ISOL taskforce.

1984-1985, Deputy Leader, Advanced Accelerator Studies Group, Lawrence Berkeley Laboratory.

Member of Central Design Group (CDG) for the Superconducting Super Collider (SSC). Key contributor to design studies/reports, early SSC parameter choices, and beam dynamics work.

1983-1984, Staff Senior Scientist Lawrence Berkeley National Lab (Physicist).

Led a team to explore LBL SuperHILAC performance upgrade possibilities. The goal was definition of a project resulting in beam intensities of several tens of particle microamperes of uranium ions, with a high confidence level and at acceptable cost. Technical focus was on source and low-beta acceleration technology as well as improvements in stripper performance. Participated in future-facility planning for high energy physics, concentrating on exploring aperture requirements, field tolerances, and lower limits on beam emittance for a 20 TeV hadron collider.

1981-1982, Physicist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory.

Physicist responsible for physics aspects of LBL stochastic cooling contribution to the Fermi National Accelerator Laboratory Antiproton Source design. Developed several conceptual designs for all cooling configurations to achieve better performance than the original proposal envisioned. Worked on electrodynamics of pickup and kicker structures; clarified aspects and consequences of nonlinear spatial dependence of electric impedances.

1982, Physicist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory.

Led a team at the LBL site to produce design and proposal of a future high-performance heavy-ion accelerator complex, the "Tevalac" (previously VENUS 82): a one-ring, superconducting-magnet accelerator-stretcher ring combination for up to 10 GeV/N uranium ions, capable of being upgraded to a 20 GeV/N accelerator or a heavy-ion colliding-beam facility.

1980-1981, Paid associate at CERN, the European Laboratory for Particle Physics in Geneva.

While on paid leave from LBL, assisted in the commissioning of the CERN Antiproton Accumulator (AA-ring). Under the direction of Nobel Prize winner Simon van der Meer, worked on beam dynamics and the debugging and improving of the high-frequency stochastic core-cooling system. Developed initial cures for several problems to make the system workable.

1979-1980, Physicist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory.

Responsible for designing new resonant extraction system and investigating the problems of complex eddy currents and ion-induced gas desorption in the new vacuum liner; efforts resulted in acceleration of uranium ions to about 1.5 GeV/nucleon. VENUS (LBL's then-active heavy ion collider proposal): Further refinement of the concept, for which work during 1978 had been instrumental. Stochastic Cooling: Physics design of the LBL Stochastic Cooling Experiment at Fermilab. This led to the first U.S. stochastic cooling results and the fastest betatron cooling rates achieved up to then.

1978, Physicist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory.

Long-range planning for future heavy-ion facilities: key contributor and focus for the development of the VENUS concept, a high-luminosity relativistic heavy-ion collider. Established performance limitations from collective effects including intra-beam scattering. These studies were seminal in establishing the basic feasibility of high luminosity relativistic heavy ion colliders. Began involvement with stochastic cooling and developed, with G. Lambertson, plans for an LBL stochastic cooling experiment.

1975-1977, Physicist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory.

Primary responsibility was direction of the NCI-funded Medical Ion Accelerator Study. The requirements of therapy, as understood then by physicians and radiobiologists, were analyzed and translated into accelerator specifications. The analysis of precision dose localization led to the development of the concept of three-dimensional beam scanning. The physics and mathematics of the procedure were analyzed and successful demonstration prototypes of some crucial components were built.

1972-1975, Physicist, Physics Division, Lawrence Berkeley Laboratory (Lofgren Group).

Performed analysis and computer simulations to investigate feasibility and necessary machine modifications to accelerate polarized protons in Bevatron. Supervised completion of high-intensity K-beam at Bevatron. Developed nonlinear tracking codes to assist in evaluation of magnet acceptance tests (spring 1974) and design of the collimators essential to high rejection rate. Investigated various aspects of heavy-ion operation in the Bevatron. First calculations regarding charge-changing cross sections led to vacuum specifications for the High Intensity Uranium Beams proposal.

1970-1972, Physicist, Nuclear Chemistry Division, Lawrence Berkeley Laboratory.

Developed new beam polarimeter and improvements to 36" scattering chamber, and initiated Deuteron operation of polarized ion source. Developed basic design of experimental beam line and detection apparatus to demonstrate feasibility of nearly monochromatic neutron beam from deuteron beam of the Bevatron.

1969-1970, Research Associate, Physikalisches Institut der Universität Basel.

Ph.D. and postdoctoral work involved development and utilization of optically pumped polarized 3He targets. This work resulted in highly polarized targets and semi-automated and precise polarization measurement methods. Work helped remove ambiguities in reaction matrix element analysis of 3He(d,p)4He reaction.

1964-1969, Teaching Assistant at Computer Center at University of Basel.

Supervision and instruction of students in computer programming and use.

1962-1964, Teaching Assistant at University of Basel.

Lab course centered around use of small research reactor, activation analysis, and tracer methods.

HONORS:

Fellow of the American Physical Society
Virginia Governor's Distinguished CEBAF Professor (1985).

COMMITTEE WORK

PUBLICATIONS

Ch. Leemann, H. Buergisser, and P. Huber, "Reaction 3He(d,p)4He with Polarized and Unpolarized Targets and Polarized Deuteron Beams of 430 keV," Helv. Phys. Acta. 44 (2):141-59 (1 Apr. 1971).

P. Huber, Ch. Leemann, H. Meiner, U. Rohrer, and F. Seiler, "3He Vector (d,p) 4He-Reaction below 2.5 MeV," Polarization Phenomena in Nuclear Reactions, ed. Barshcall, Univ. Wisconsin, Madison, Wis., pp. 546-7 (1971).

Ch. Leemann, H. Buergisser, and P. Huber, "Investigation of3He(d,p)4He-Reaction with Polarized Beam and Target," Ann. Phys. 66 (2):845-65 (Aug. 1971).

U. Rohrer, P. Huber, Ch. Leemann, H. Meiner, and F. Seiler, "Analysing Power of the 3He(d,p)4He-Reaction for Target Polarization between 300 keV and 2.5 MeV," Helv. Phys Acta 44 (7): 845-65 (31 Dec. 1971).

J. S. C. McKee, H. E. Conzett, R. M. Larimer, and Ch. Leemann, "Further Evidence for the Dominance of Nucleon-Nucleon P-Wave Forces in Vector Polarizations in N-d Scattering below 15 MeV," Phys. Rev. Lett. 29 (24):1613-16 (11 Dec. 1974).

B. Mayer, H. E. Conzett, D. G. Kovar, R. M. Larimer, and Ch. Leemann, "(d,3He) and (d,t) Reactions Induced by Polarized Deuterons," Nucl. Chem. Annual Report, LBL Report No. 1666 (1972).

H. E. Conzett, W. Dahme, Ch. Leemann, J. A. Macdonald, and J. P. Meulders, "Vector Analyzing Power in (d,4He) Elastic Scattering between 15 and 45 MeV," Nuc. Chem. Annual Report, LBL Report No. 1666, pp. 55-6 (1972).

C. R. Lamontagne, H. E. Conzett, B. Frois, R. J. Slobodrian, Ch. Leemann, and R. De Swiniarski, "Scattering of Polarized Protons from Si in the Giant Resonance Region of 29P," Phys Lett. B 458 (5):465-8.

Ch. Leemann, W. Mehlhop, H. Grunder, O. Piccioni, P. Thomas, D. Scipione, R. Garland, and J. Sebek, "Deuteron Stripping at 6 GeV/c and Production of a Tagged Neutron Beam," Int. Conf. on Inst. for High Energy Phys., Frascati, Italy (May 8, 1973).

B. Mayer, H. E. Conzett, W. Dahme, D. G. Kovar, R. M. Larimer, and Ch. Leemann, "J Dependence of the Vector Analyzing Power for (d,3He) and (d,t) Reactions," Phys Rev. Lett. 32 (25):2452-4 (1975).

Ch. Leemann, R. Morgado, and R. Sah, "New High Intensity K-Beam at the Bevatron," IEEE Trans. Nucl. Sci., Vol. NS-22, No. 3, p. 1484 (1975).

H. Grunder, Ch. Leemann, and F. Selph, "Relativistic Heavy Ion Accelerators," Int. Conf. on High Energy Accs., Serpukhov, USSR, 11 July 1977, LBL Report No. 6425.

H. Grunder and Ch. Leemann, "Present and Future Sources of Protons and Heavy Ions," Proc. Par. and Rad. Ther., Berkeley, Ca., LBL Report No. 5395 (Sep 1976), pp. 71-80.

Ch. Leemann, J. Alonso, D. Clark, H. Grunder, E. Hoyer, K. Lou, J. Staples, and F. Voelker, "Heavy Ion Facility for Radiation Therapy," LBL Report No. 5545; IEEE Trans. Nucl. Sci. 3:986-89, 1977 (No. 3).

Ch. Leemann, J. Alonso, H. Grunder, E. Hoyer, K. Lou, G. Kalnin, D. Rondeau, J. Staples, and F. Voelker, "Three Dimensional Beam Scanning System for Particle Radiation Therapy," Particle Accel. Conf., Chicago, Ill.; LBL Report No. 5546; IEEE Trans. Nucl. Sci. 24:1052-1054 (1977).

Ch. Leemann, "Arguments for Low Q in IMJ Synchrotron," Proc. Heavy Ion Fusion Workshop, Brookhaven National Lab., New York, pp. 8-9 (17 Oct. 1977).

H. Grunder, Ch. Leemann, and F. Selph, "Next Generation of Relativistic Heavy Ion Accelerators," Darmstadt, Germany, LBL Report No. 7921 (7 May 1978).

C. R. Lamontagne, B. Frois, R. J. Slobodrian, H. E. Conzett, and Ch. Leemann, "Elastic Scattering of p Vector = 28Si in the Giant Resonance Region," Nucl. Sci. Annual Report, pp. 62-3 (1 July 1978).

G. U. Behrsing, D. J. Clark, E. H. Hoyer, C. W. Leemann, F. Voelker, and R. B. Yourd, "Cyclotron Design Studies for a Medical Ion Accelerator," Conf. on Cyclotrons and Their Applications, Bloomington, Indiana, LBL Report No. 7738; IEEE Trans. Nucl. Sci. 26:2061-2064, 1979 (No. 2).

B. Brown, D. Cline, F. Cole, E. Colton, T. Collins, E. Crosbie, N. Dikansky, T. Fields, A. Garren, E. Gray, J. Griffin, W. B. Herrmannsfeldt, R. Huson, D. Johnson, W. Kells, G. Lambertson, C. Leemann, A. Lennox, J. Maclachlan, P. Mcintyre, I. Meshkov, G. Michelassi, F. Mills, Y. Miyahara, D. Moffett, J. Nicholls, L. Oleksiuk, I. Orosz, V. Parkhomchuk, T. Rhoades, A. Ruggiero, J. Simpson, G. Silvestrov, L. Teng, D. Young, Design Report: The Fermilab High Intensity Anti-Proton Source, 1979.

Ch. Leemann, "Prospects for High Energy Heavy Ion Accelerators," IEEE Trans. Nucl. Sci., Vol. NS-26, No. 3, p. 3638 (1979). Also LBL Report No. 8899 (1979).

G. Lambertson, J. Bisognano, W. Flood, L. J. Laslett, Ch. Leemann, B. Leskovar, C. C. Lo, R. Main, L. Smith, and J. Staples, "Stochastic Cooling of 200 MeV Protons," Proc. 11th Internat'l. Conf, on High Energy Accelerators, CERN, Geneva (1980), pp. 794-799. Also LBL Report No. 10757.

B. Autin, R. Billinge, R. Brown, G. Carron, C. Johnson, E. Jones, H. Koziol, Ch. Leemann, T. R. Sherwood, S. van der Meer, and E. J. N. Wilson, "Beam Optics Studies on the Antiproton Accumulator," IEEE Trans. Nucl. Sci., Vol. NS-28, No. 3, p. 2055 (1981).

G. Lambertson, J. Bisognano, W. Flood, K. Kim, Ch. Leemann, B. Leskovar, C. C. Lo, R. Main, R. Reimers, L. Smith, J. Staples, "Experiments on Stochastic Cooling of 200 MeV Protons," IEEE Trans. Nucl. Sci., Vol. NS-28, No. 3, p. 2471 (1981). Also LBL Report No. 11783.

J. Bisognano and Ch. Leemann, "Stochastic Cooling," Proceedings, Physics of High Energy Accelerators (FNAL, 1982), pp. 583-655; LBL Report No. 14106.

Glen R. Lambertson, Christoph W. Leemann, "Anti-Proton Production and Accumulation for a 20-TeV Anti-P P Collider," LBL-15089-mc (microfiche); also, Snowmass Summer Study 1982, p. 338.

R. Diebold (Argonne), C. Ankenbrandt, T. Collins, E. Fisk, D. Johnson, P. Mantsch, J. Peoples, R. Shafer, L. Teng (Fermilab), G. Lambertson, C. Leemann, L. Smith, C. Taylor (LBL), L. Jones (Michigan), "'Conventional' 20-TeV, 10-Tesla Anti-P P Colliders," ANL-HEP-CP-82-52-mc (microfiche) (1982).

C. W. Leemann, G. R. Lambertson, "Intense Anti-Proton Source for a 20-TeV Collider," IEEE Trans. Nucl. Sci. 30:2025-2027 (1983).

C. Leemann, "Considerations Regarding the Choice of Beam Parameters and IP Configuration for the SSC," Ann Arbor 1983: Proc., Accelerator Physics Issues for a Superconducting Super Collider, pp. 50-53 (1984).

E. D. Courant (Brookhaven), C. Ankenbrandt, M. Harrison, J. F. Schonfeld (Fermilab), Y. Cho, R. Martin (Argonne), J. Gareyte, S. Peggs, L. Teng (CERN), K. M. Terwilliger, A. Hofmann, P. Morton (SLAC), A.D. Krisch (Michigan U.), J. L. Laclare (Saclay), C. Leemann, W. Wenzel (LBL), A. Piwinski, K. Steffen (DESY), "Luminosity and Tune Shifts," Ann Arbor 1983: Proc., Accelerator Physics Issues for a Superconducting Super Collider, p. 12 (1984).

R. Diebold, Y. Cho, R. Martin (Argonne), C. Ankenbrandt, M. Harrison, J. F. Schonfeld (Fermilab), J. Gareyte, S. Peggs, L. Teng (CERN), A. Hofmann, P. Morton (SLAC), A. D. Krisch, K. M. Terwilliger (Michigan ), J. L. Laclare (Saclay), C. Leemann, W. Wenzel (LBL, Berkeley), A. Piwinski, K. Steffen (DESY), "Determination of First Order Machine Parameters from Particle Physics Requirements," Ann Arbor 1983: Proc., Accelerator Physics Issues for a Superconducting Super Collider, pp. 5-11 (1984).

C. Leemann, "Injection, Extraction and Beam Abort System," Ann Arbor 1983: Proc., Accelerator Physics Issues for a Superconducting Super Collider, p. 73 (1984).

Christoph Leemann, "Choice of IP Geometry and Beam Parameters for the SSC," LBL-17052 (1984).

A. Chao, C. W. Leemann, "More on the Overlap Knockout Resonances in the SSC," SSC-016, 1985.

C. W. Leemann, "The CEBAF Superconducting Accelerator: An Overview," CEBAF-PR-86-003, Proceedings of the 1986 Linear Accelerator Conference.

H. A. Grunder, C. W. Leemann, R. M. Sundelin, B. K. Hartline, "Superconducting Radio Frequency Technology: Expanding the Horizons of Physics and Technology," CEBAF-PR-87-23, published in US-CERN Accel. School, 1986.

S. D. Holmes (Fermilab), C. W. Leemann (LBL, Berkeley), "Electron Proton Colliders at the SSC," Snowmass 1984: Proceedings, Design and Utilization of the Superconducting Super Collider, pp. 485-489 (1986).

A .J. Dragt, R. Talman, R. H. Siemann, G. F. Dell, B. Leemann, C. W. Leemann, U. Nauenberg, S. Peggs, D. Douglas, "Computing Requirements for S.S.C. Accelerator Design and Studies," Snowmass 1984: Proc., Design and Utilization of the Superconducting Super Collider, pp. 395-398 (1986).

C. Benvenuti, P. Bernard, E. Chiaveri, E. Haebel, H. Lengeler, M. Minestrini (CERN), J. Bisognano, I.E. Campisi, C. Leemann (Jefferson Lab), R. Boni, U. Gambardella, G. Modestino, B. Spataro, F. Tazzioli (Frascati), H. Piel (Wuppertal U.), D. Proch (DESY), "Superconducting RF Systems and Cryogenics," Courmayeur 1987, Proceedings, Heavy-Quark Factory and Nuclear-Physics Facility with Superconducting Linacs, pp. 209-223 (1987).

C. Biscari, P. Patteri, M. Preger (Frascati), C. Leemann, R. York (Jefferson Lab), "Lattices," Courmayeur 1987, Proceedings, Heavy-Quark Factory and Nuclear-Physics Facility with Superconducting Linacs, pp. 129-136 (1987).

H. A. Grunder, J. Bisognano, W. I. Diamond, B. K. Hartline, C. W. Leemann, J. Mougey, R. M. Sundelin, R. C. York, "The Continuous Electron Beam Accelerator Facility," CEBAF-PR-87-017, CEBAF Summer Workshop, 1987; Nucl. Phys. A 478:831c-846c (1988).M

C. W. Leemann, "CEBAF: Design Overview and Project Status," CEBAF-PR-88-001, published in Courmayeur Workshop, 1988.

C. W. Leemann, C. G. Yao, "A Highly Effective Deflecting Structure" (CEBAF-TN-90-217), p. 232, Proceedings of the 1990 Linear Accelerator Conference.

C. W. Leemann, "CEBAF Progress Report," CEBAF 1992 Summer Workshop, pp. 11-24 (Newport News, Va.: CEBAF/Jefferson Lab, 1992).

J. J. Bisognano, D. Douglas, H. F. Dylla, L. Harwood, G. A. Krafft, C. W. Leemann, P. Liger, T. Mann, G.R. Neil, D. V. Neuffer, C. Rode, C. K. Sinclair, B. Yunn, "Use of the CEBAF Accelerator for IR and UV Free Electron Lasers," CEBAF-PR-92-023 (1992).

G. R. Neil, J. J. Bisognano, D. Douglas, H. F. Dylla, L. Harwood, G. A. Krafft, C. W. Leemann, P. Liger, T. Mann, D. V. Neuffer, C. Rode, C. K. Sinclair, B. Yunn, "Status Report on the CEBAF IR and UV FELs," CEBAF-PR-92-029 (1992).

G. R. Neil, J. J. Bisognano, H. F. Dylla, G. A. Krafft, C. W. Leemann, C. K. Sinclair, B. Yunn, "FEL Design Using the CEBAF Linac," CEBAF-PR-91-022, Nucl. Instrum. Meth. A318:212-215, 1992; also, Proc. 1991 Part. Accel. Conf., pp. 2745-2747.

C. W. Leemann, "Report on CEBAF," Proceedings, High Energy Accelerators, Vol. 1, pp. 50-54; Int. J. Mod. Phys. A, Proc. Suppl. 2A (1993) 50-54.

L. Merminga, G. A. Krafft, C. W. Leemann, R. M. Sundelin, B. C. Yunn, J. J. Bisognano, "Specifying HOM Power in High Average Current, Short Bunch Length SRF Environment," Proc. XX International Linac Conf., ed. A. W. Chao, pp. 860-862 (Monterey, Ca.; SLAC-R-56, eConf C00821:THC04) 2000.

Leemann, Christoph. "RIA Project." Proc. XX International Linac Conf., ed. A. W. Chao, pp. 331-335 (Monterey, Ca.; SLAC-R-56, eConf C00821:TU103) 2000.