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Hoffstaetter, Georg Heinz
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Positions
- Professor, Physics (PHYS), College of Arts and Sciences
- Dir Assistant Acad, Laboratory for Elementary-Particle Physics (LEPP), Cornell Laboratory for Accelerator-based Sciences and Education (CLASSE)
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Affiliations
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Research
research overview
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- Physics of Beams
- Accelerator Technology
principal investigator on
- ADVANCED MANUFACTURING AND TESTING OF SEAMLESS HIGH PURITY CVD NIOBIUM SUPERCONDUCTING RADIO FREQUENCY CAVITIES awarded by DEPARTMENT OF ENERGY 2012
- BEAM PIPE HOM ABSORBER FOR 750 MHZ RF CAVITY SYSTEM awarded by DEPARTMENT OF ENERGY 2009 - 2013
- BULK CHEMISTRY AND HEAT TREATMENT OF THREE CRAB CAVITIES awarded by DEPARTMENT OF ENERGY 2012 - 2013
- FUNDAMENTAL RESEARCH IN SUPERCONDUCTING RF CAVITY DESIGN awarded by CHICAGO OPERATIONS OFFICE DOE 2009 - 2012
- HOM SAMPLE TESTING FOR ARGONNE NATIONAL LAB awarded by DEPARTMENT OF ENERGY 2012
- ILC SRF R&D FOR ART 2009 awarded by DEPARTMENT OF ENERGY 2009 - 2012
- RAISING SUPERCONDUCTING CAVITY GRADIENTS awarded by CHICAGO OPERATIONS OFFICE DOE 2012 - 2015
- RESEARCH IN SUPERCONDUCTING RADIOFREQUENCY SYSTEMS awarded by CHICAGO OPERATIONS OFFICE DOE 2004 - 2012
- RESEARCH IN SUPERCONDUCTING RADIOFREQUENCY SYSTEMS: ARRA FUNDING awarded by CHICAGO OPERATIONS OFFICE DOE 2010 - 2012
- RESPONSE TO RFP NO. 182612; NATIONAL SYNCHROTRON LIGHT SOURCE II SUPERCONDUCTING CAVITY CRYO MODULE. awarded by DEPARTMENT OF ENERGY 2011 - 2013
- REU SITE: ACCELERATOR PHYSICS AND SYNCHOTRON RADIATION SCIENCE awarded by DIRECTORATE FOR MATHEMATICAL & PHYSICAL SCIENCES NSF 2012 - 2015
- SUPERCONDUCTING RF (SRF) DEVELOPMENT FOR THE PROJECT X NEUTRINO BEAM TO DUSEL awarded by DIRECTORATE FOR MATHEMATICAL & PHYSICAL SCIENCES NSF 2010 - 2013
co-principal investigator on
- IMR: PHASE 1B ENERGY RECOVERY LINAC (ERL) TECHNOLOGY R&D awarded by DIRECTORATE FOR MATHEMATICAL & PHYSICAL SCIENCES NSF 2010 - 2014
- LEPTON COLLIDER R&D awarded by NATL SCIENCE FOUNDATION 2011 - 2014
Publications
individual publications
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academic article
- Record high-average current from a high-brightness photoinjector. Applied Physics Letters. 102. 2013
- Cryomodule Development at Daresbury Laboratory. ICFA Beam Dynamics Newsletter. 170-182. 2010
- Extended one-dimensional method for coherent synchrotron radiation including shielding. Physical Review Special Topics-Accelerators and Beams. 12. 2009
- Exact 1D model for coherent synchrotron radiation with shielding and bunch compression. Physical Review Special Topics-Accelerators and Beams. 12. 2009
- Equilibrium ion distribution in the presence of clearing electrodes and its influence on electron dynamics. Physical Review Special Topics-Accelerators and Beams. 11. 2008
- Compensation of wakefield-driven energy spread in energy recovery linacs. Physical Review Special Topics-Accelerators and Beams. 11. 2008
- Transverse emittance dilution due to coupler kicks in linear accelerators. Physical Review Special Topics-Accelerators and Beams. 10. 2007
- Recirculating beam-breakup thresholds for polarized higher-order modes with optical coupling. Physical Review Special Topics-Accelerators and Beams. 10. 2007
- Focus on Accelerator and Beam Physics. New Journal of Physics. 8. 2006
- Experimental investigation of multibunch, multipass beam breakup in the Jefferson Laboratory Free Electron Laser Upgrade Driver. Physical Review Special Topics-Accelerators and Beams. 9. 2006
- Ion clearing in an ERL. Nuclear Instruments & Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipment. 557:205-210. 2006
- Optic issues in ongoing ERL projects. Nuclear Instruments & Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipment. 557:145-164. 2006
- Optics and beam transport in energy recovery linacs. Nuclear Instruments & Methods in Physics Research Section A - Accelerators Spectrometers Detectors and Associated Equipment. 557:345-353. 2006
- Adiabatic invariance of spin-orbit motion in accelerators. Physical Review Special Topics-Accelerators and Beams. 9. 2006
- Orbit and optics improvement by evaluating the nonlinear beam position monitor response in the Cornell Electron Storage Ring. Physical Review Special Topics-Accelerators and Beams. 8. 2005
- Coherent beam-beam tune shift of unsymmetrical beam-beam interactions with large beam-beam parameter. Physical Review E. 71. 2005
- Optimal axes of Siberian snakes for polarized proton acceleration. Physical Review Special Topics-Accelerators and Beams. 7. 2004
- Strength of higher-order spin-orbit resonances. Physical Review E. 70. 2004
- Synchrobetatron stop bands due to a single crab cavity. Physical Review Special Topics-Accelerators and Beams. 7. 2004
- Beam-breakup instability theory for energy recovery linacs. Physical Review Special Topics-Accelerators and Beams. 7. 2004
- Investigation of the flat-beam model of the beam-beam interaction. Physical Review Special Topics-Accelerators and Beams. 6. 2003
- Beam-based alignment of interaction region magnets. Physical Review Special Topics-Accelerators and Beams. 5. 2002
- Successive approximations for charged particle motion. Ultramicroscopy. 81:111-121. 2000
- Polarized protons in HERA. Nuclear Physics A. 666-667:203-213. 2000
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article
- The Cornell Energy Recovery Linac: update on a future source of coherent hard x-rays. CHESS News Magazine. 32-36. 2009
- Impact of a Future Energy Recovery Linac X-ray Source on Nanoscale Science. CHESS News Magazine. 12-16. 2005
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book
- High-energy polarized proton beams: a modern view. New York: Springer. 2006
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conference paper
- Developments for Cornell's X-Ray ERL. Particle Accelerator Conference. 2009
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editorial article
- In Memory of Robert H. Siemann. Physical Review Special Topics-Accelerators and Beams. 11. 2008
selected publications listing
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- Wake-field compensation in Energy Recovery Linacs,
G.H. Hoffstaetter, M.G. Billing, Y.H. Lau, Proceedings EPAC08, Genoa/IT (2008) - Intra Beam Scattering in Linear Accelerators, especially ERLs,
G.H. Hoffstaetter, M.P. Ehrlichman, A.B. Temnykh, Proceedings EPAC08, Genoa/IT (2008) - CSR including Shielding in the Beam Dynamics code Bmad,
David C. Sagan, G.H. Hoffstaetter, C.E. Mayes, U. Sae-Ueng, Proceedings EPAC08, Genoa/IT (2008) - Challenges for Beams in an ERL Extension to CESR,
G.H. Hoffstaetter, I.V. Bazarov, D.H. Bilderback, M.G. Billing, G.W. Codner, J.A. Crittenden, B.M. Dunham, M.P. Ehrlichman, K.D. Finkelstein, M.J. Forster, S. Greenwald, S.M. Gruner, V.O. Kostroun, Y. Li, M.U. Liepe, C.E. Mayes, S.B. Peck, D.C. Sagan, Ch. Spethmann, A.B. Temnykh, M. Tigner, Y. Xie, Proceedings EPAC08, Genoa/IT (2008) - Extended 1D method for Coherent Synchrotron Radiation including Shielding,
D.C. Sagan, G.H. Hoffstaetter, C.E. Mayes, U. Sae-Ueng, submitted to Phys. Rev. ST-AB and arXiv 0806.2893v1 (2008) - Beam losses due to intra-beam and residual gas scattering for Corenll's Energy Recovery Linac,
A.B. Temnykh, M.P. Ehrlichman, G.H. Hoffstaetter, Proceedings EPAC Genoa/IT (2008) - Compensation of wake-field-driven energy spread in Energy Recovery Linacs,
G.H. Hoffstaetter, Y.H. Lau, Physical Review ST-AB 11, 070701 (2008) - Equilibrium ion distribution in the presence of clearing electrodes and its influence on electron dynamics,
G.H. Hoffstaetter, C. Spethmann, Physical Review ST-AB 11, 014001 (2008) - Beam-breakup simulations for the Cornell x-ray ERL,
C. Song, G. Hoffstaetter, Proceedings PAC07, Albuquerque/NM (2007) - Controlling coupler-kick emittance growth in the Cornell ERL main linac,
G.H. Hoffstaetter, B. Buckley, Proceedings PAC07, Albuquerque/NM (2007) - Equilibrium ion distribution in the presence of clearing electrodes and its influence on electron dynamics,
G.H. Hoffstaetter, C. Spethmann, Proceedings PAC07, Albuquerque/NM (2007) - Progress toward an ERL Extension to CESR,
G.H. Hoffstaetter, I.V. Bazarov, D.H. Bilderback, J. Codner, B. Dunham, D. Dale, K. Finkelstein, M. Forster, S. Greenwald, S.M. Gruner, Y. Li, M. Liepe, C. Mayes, D. Sagan, C.K. Sinclair, C. Song, A. Temnykh, M. Tigner, Y. Xie, Proceedings PAC07, Albuquerque/NM (2007) - Method of perturbative-PIC simulation for interactions between a particle bunch and its coherent synchrotron radiation,
J. Shi, G.H. Hoffstaetter, Method of Perturbative-PIC Simulation for Interactions between a Particle Bunch and Its Coherent Synchrotron Radiation, Proceedings PAC07, Albuquerque/NM (2007) - Transverse Emittance Dilution due to Coupler Kicks in Linear Accelerators,
B. Buckley, G.H. Hoffstaetter, Physical Review ST-AB 10, 111002 (2007) - Recirculating BBU thresholds for polarized HOMs with optical coupling,
G.H. Hoffstaetter, I.V. Bazarov, C. Song, Physical Review ST-AB 10, 044401 (2007) - Magnetic Field Error Sensitivity in an Energy Recovery Linac ,
C. Song, G.H. Hoffstaetter, Report Cornell-ERL-07-03 (2007) - Energy Recovery Linac - The future gets brighter,
G.H. Hoffstaetter, Connecting with Cornell, Office of the Vice Provost for Research, Cornell University (Fall 2006) - Longitudinal BBU Threshold Current in Recirculating Linacs ,
C. Song, G.H. Hoffstaetter, Report Cornell-ERL-06-04 (2006) - Experimental investigation of multibunch, multipass beam breakup in the Jefferson Laboratory Free Electron Laser Upgrade Driver ,
D.R. Douglas, K.C. Jordan, L. Merminga, E.G. Pozdeyev, C.D. Tennant, H. Wang, T.I. Smith, S. Simrock, I.V. Bazarov, G.H. Hoffstaetter, Physical Review ST-AB 9, 064403 (2006) - Emittance Dilution due to Transverse Coupler Kicks in the Cornell ERL,
B. Buckley, J. Choi, G.H. Hoffstaetter, Report Cornell-ERL-06-02 (2006) - Transverse Recirculating-BBU Threshold Current in the Cornell x-ray ERL,
C. Song, G.H. Hoffstaetter, Report Cornell-ERL-06-01 (2006) - Ion clearing in an ERL,
G.H. Hoffstaetter, M.U. Liepe, Nuclear Instruments and Methods in Physics Research A 557, 205-212 (2006) - Optics and Beam Transport in Energy Recovery Linacs ,
G.H. Hoffstaetter, V. Litvinenko, H. Owen, Nuclear Instruments and Methods in Physics Research A 557, 345-353 (2006) - Optics issues in ongoing ERL projects ,
S. Smith, B.D. Muratori, H.I. Owen, G.H. Hoffstaetter et al., Nuclear Instruments and Methods in Physics Research A 557, 145-164 (2006) - Impact of a future energy recovery linac x-ray source on nanoscale science,
D. Bilderback, I.V. Bazarov, J.D. Brock, E. Fontes, S.M. Gruner, G.H. Hoffstaetter, A. Kaimirov, Q. Shen, CHESS News Magazine (2005) - Characterization of CESR BPMs Using a BPM Test Stand,
J. Urban, N. Iqbal, G.H. Hoffstaetter, M. Billing, Report Cornell-CBN-05-19 (2005) - ERL upgrade of an existing X-ray facility: CHESS at CESR,
G.H. Hoffstaetter, Report Cornell-ERL-05-08, this is a contribution to the following paper by S. Smith et al. (2005) - Status of a Plan for an ERL Extension to CESR,
G.H. Hoffstaetter, I.V. Bazarov, S. Belomestnykh, D.H. Bilderback, M.G. Billing, J.S-H. Choi, Z. Greenwald, S.M. Gruner, Y. Li, M. Liepe, H. Padamsee, D. Sagan, C.K. Sinclair, K.W. Smolenski, C. Song, R.M. Talman, M. Tigner, Proceedings PAC05, Knoxville/TN (2005) - Experimental investigation of beam breakup in the Jefferson Laboratory 10kW FEL Upgrade,
C. Tennant, D. Douglas, K. Jordan, L. Merminga, E. Pozdeyev, H. Wang, I.V. Bazarov, G.H. Hoffstaetter, C.K. Sinclair, S. Simrock, T.I. Smith, Proceedings PAC05, Knoxville/TN (2005) - Orbit and Optics Improvement by Evaluating the Nonlinear BPM Response
in the Cornell Electron Storage Ring,
R.W. Helms, G.H. Hoffstaetter, Physical Review ST-AB 8, 062802 (2005)
- Wake-field compensation in Energy Recovery Linacs,
featured in archived article
Teaching
Background
education and training
- Ph.D., Michigan State University 1994
- M.S., Michigan State University 1992
- Darmstadt University of Technology , Diplom 1991