Zobrazeno 1 - 10
of 19
pro vyhledávání: '"S.P. Jachim"'
Autor:
S.P. Jachim, B.R. Cheo
Publikováno v:
IEEE Transactions on Electron Devices. 38:2264-2274
The issues of space-based, high-average-power, high-energy linear accelerators (LINACs) are addressed in connection with the associated RF power interaction problems. The basic operating principles of three types of LINACs are reviewed. Models of the
Autor:
F.D. Wells, S.P. Jachim
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
Beam position detection equipment often uses circuits that convert amplitude-modulated position signals to phase modulation. These signals are limited to remove amplitude variations, and phase-detected to obtain analog position information. The phase
Autor:
E.F. Natter, S.P. Jachim
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
The Ground Test Accelerator (GTA) will be a heavily beam-loaded H/sup -/ linac with tight tolerances on accelerating field parameters. The methods used in modeling the effects of beam loading in this machine are described. The response of the cavity
Publikováno v:
Proceedings of International Conference on Particle Accelerators.
This paper presents the results of the adaptive feedforward system in use on the Ground Test Accelerator (GTA). The adaptive feedforward system was shown to correct repetitive, high-frequency errors in the amplitude and phase of the RF field of the p
Autor:
S.P. Jachim, P. Denney
Publikováno v:
Proceedings of International Conference on Particle Accelerators.
This paper describes the performance of the RF systems on the Ground Test Accelerator (GTA). The RF system architecture is briefly described. Among the RF performance results presented are RF field flatness and stability, amplitude and phase control
Autor:
E. Hansberry, L. Eaten, W. D. Gutscher, E.F. Natter, T.R. Brooks, M. Curtin, S.P. Jachim, J. Hill, P. Denney, C.D. Ziomek, A. Regan
Publikováno v:
Proceedings of International Conference on Particle Accelerators.
This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system that has been r
Autor:
S.P. Jachim, A. Young
Publikováno v:
Conference Record of the 1991 IEEE Particle Accelerator Conference.
The authors describe the implementation of a general, linear model of an RF cavity which was used to develop a real-time signal processor. This device fully emulates the response of an RF cavity upon receiving characteristic parameters (Q/sub 0/, ome
Publikováno v:
Conference Record of the 1991 IEEE Particle Accelerator Conference.
The authors describe a multivariable control system that compensates the electrical structure of the accelerator by using gain-shaping in the frequency domain. The amplitude and phase quantities have been resolved into in-phase and quadrature (I&Q) v
Autor:
S.P. Jachim, W.D. Gutscher
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 37:1825-1828
An alternative method is presented for calibrating the six-port reflectometer. Through the use of a redundant set of calibration standards, an estimate of the 11 real calibration constants is determined in the minimum-mean-squared-error sense. This t
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