R. H. Siemann
Cornell University
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Publication
Featured researches published by R. H. Siemann.
Nuclear Instruments and Methods in Physics Research | 1983
D. Andrews; P. Avery; K. Berkelman; R. Cabenda; D. G. Cassel; J. W. DeWire; R. Ehrlich; T. Ferguson; B.G. Gibbard; M. G. D. Gilchriese; B. Gittelman; D. L. Hartill; D. Herrup; M. Herzlinger; J. Kandaswamy; D. L. Kreinick; D. Larson; N. B. Mistry; F. Morrow; E. Nordberg; R. Perchonok; R. Plunkett; K. A. Shinsky; R. H. Siemann; A. Silverman; P. C. Stein; S. Stone; Richard Talman; D. Weber; R. Wilcke
Abstract The construction and performance of a large aperture magnetic detector designed for use at the Cornell Electon Storage Ring is descr bed.
Nuclear Instruments and Methods in Physics Research | 1982
R. H. Siemann
Abstract A technique is developed for computer simulation of bunch lengthening in e + −e − storage rings. This technique is applied to SPEAR, and the results are in agreement with data.
Nuclear Instruments and Methods in Physics Research | 1983
G. Aharonian; R. Meller; R. H. Siemann
Abstract A computer program, DBCI, is described. This program is used to calculate transverse wakefields for relativistic beams passing through cylindrically symmetric cavities. Some examples of results are given, and comparison is made with measurements.
Applied Physics Letters | 1983
D. H. Auston; R. R. Freeman; P. R. Smith; D.M. Mills; R. H. Siemann
A novel photoconducting detector for time‐resolved measurements in the x‐ray region of the spectrum has been constructed. Time resolution of better than 40 ps at energies between 3 and 10 keV has been demonstrated in bunch length measurements on the Cornell Electron Storage Ring. At high beam currents, dramatic instabilities and a breakup of the electron bunch were directly observed with this detector.
Nuclear Instruments and Methods in Physics Research | 1983
E.B. Blum; R. H. Siemann; D.H. Auston; R.R. Freeman; P. Smith; D.M. Mills
Abstract A novel photoconducting detector has been used for bunch length measurements in CESR. The detector and measurements are described in detail. At 5.17 GeV beam energy no bunch lengthening was observed for beam currents up to 26.0 mA (4.2sx10 11 electrons) in a single bunch. These results agree well with bunch lengthening calculations.
Nuclear Instruments and Methods in Physics Research | 1984
R. H. Siemann
Abstract Computer simulation is used to study single beam stability in PEP and PETRA. The inputs to the simulation are parameters which describe the single particle motion and wakefields calculated from radio frequency cavity dimensions. All of the features of the collective effects observed in these two storage rings are also observed in the simulations, and the threshold currents are in reasonable quantitative agreement. Since the necessary inputs would be known during the design phase of a new storage ring, simulations of the ty[e described can be used to evaluate potential beam stability problems.
Physical Review Letters | 1980
D. Andrews; K. Berkelman; R. Cabenda; D. G. Cassel; J. W. DeWire; R. Ehrlich; T. Ferguson; T. Gentile; M. Gilchriese; B. Gittelman; D. L. Hartill; D. Herrup; M. Herzlinger; D. L. Kreinick; N. B. Mistry; E. Nordberg; R. Perchonok; R. Plunkett; K. A. Shinsky; R. H. Siemann; A. Silverman; P. C. Stein; S. Stone; Richard Talman; H. G. Thonemann; D. Weber; C. Bebek; J. Haggerty; J. M. Izen; W. A. Loomis
Physical Review Letters | 1980
D. Andrews; K. Berkelman; M. Billing; R. Cabenda; D. G. Cassel; J. W. DeWire; R. Ehrlich; T. Ferguson; T. Gentile; B. Gibbard; M. G. D. Gilchriese; B. Gittelman; D. L. Hartill; D. Herrup; M. Herzlinger; D. L. Kreinick; D. Larson; N. B. Mistry; E. Nordberg; S. Peggs; R. Perchonok; R. Plunkett; J. Seeman; K. A. Shinsky; R. H. Siemann; A. Silverman; P. C. Stein; S. Stone; Richard Talman; H. G. Thonemann
Physical Review Letters | 1981
C. Bebek; J. Haggerty; J. M. Izen; C. Longuemare; W. A. Loomis; F. M. Pipkin; J. Rohlf; W. Tanenbaum; Richard Wilson; A. J. Sadoff; D. L. Bridges; K. Chadwick; P. Ganci; H. Kagan; R. Kass; F. Lobkowicz; A. C. Melissinos; S. L. Olsen; R. Poling; C. Rosenfeld; G. Rucinski; E. H. Thorndike; G. Warren; D. Bechis; J. Mueller; D. Potter; F. Sannes; P. Skubic; R. Stone; A. Brody
Physical Review Letters | 1981
K. Chadwick; P. Ganci; H. Kagan; R. Kass; F. Lobkowicz; A. C. Melissinos; S. L. Olsen; R. Poling; C. Rosenfeld; G. Rucinski; E. H. Thorndike; J. Mueller; D. Potter; F. Sannes; P. Skubic; R. Stone; A. Brody; A. Chen; M. Goldberg; Nahmin Horwitz; J. Kandaswamy; H. Kooy; P. Lariccia; G. C. Moneti; M. S. Alam; S. E. Csorna; R. S. Panvini; J. S. Poucher; D. Andrews; K. Berkelman
