Improvement of Digital Filter for the FNAL Booster Transverse Dampers
Title | Improvement of Digital Filter for the FNAL Booster Transverse Dampers PDF eBook |
Author | |
Publisher | |
Pages | |
Release | 2013 |
Genre | |
ISBN |
Fermilab Booster has two transverse dampers which independently suppress beam instabilities in the horizontal and vertical planes. A suppression of the common mode signal is achieved by digital notch filter which is based on subtracting beam positions for two consecutive turns. Such system operates well if the orbit position changes sufficiently slow. Unfortunately it is not the case for FNAL Booster where the entire accelerating cycle consists of about 20000 turns, and successful transition crossing requires the orbit drifts up to about 10 [mu]m/turn, resulting in excessive power, power amplifier saturation and loss of stability. To suppress this effect we suggest an improvement of the digital filter which can take into account fast orbit changes by using bunch positions of a few previous turns. To take into account the orbit change up toN-th order polynomial in time the system requires (N + 3) turns of "prehistory". In the case of sufficiently small gain the damping rate and the optimal digital filter coefficients are obtained analytically. Numerical simulations verify analytical theory for the small gain and predict a system performance with gain increase.
Energy Research Abstracts
Title | Energy Research Abstracts PDF eBook |
Author | |
Publisher | |
Pages | 760 |
Release | 1982 |
Genre | Power resources |
ISBN |
Proceedings
Title | Proceedings PDF eBook |
Author | |
Publisher | |
Pages | 772 |
Release | 1995 |
Genre | Nuclear physics |
ISBN |
Proceedings of the 1995 Particle Accelerator Conference
Title | Proceedings of the 1995 Particle Accelerator Conference PDF eBook |
Author | |
Publisher | |
Pages | 766 |
Release | 1996 |
Genre | Nuclear engineering |
ISBN |
Conference Record of the 1991 IEEE Particle Accelerator Conference
Title | Conference Record of the 1991 IEEE Particle Accelerator Conference PDF eBook |
Author | |
Publisher | |
Pages | 736 |
Release | 1991 |
Genre | Nuclear engineering |
ISBN |
Conference Record of the 1991 IEEE Particle Accelerator Conference
Title | Conference Record of the 1991 IEEE Particle Accelerator Conference PDF eBook |
Author | IEEE Nuclear and Plasma Sciences Society |
Publisher | Institute of Electrical & Electronics Engineers(IEEE) |
Pages | 720 |
Release | 1991 |
Genre | Science |
ISBN | 9780780301351 |
Global Trends 2040
Title | Global Trends 2040 PDF eBook |
Author | National Intelligence Council |
Publisher | Cosimo Reports |
Pages | 158 |
Release | 2021-03 |
Genre | |
ISBN | 9781646794973 |
"The ongoing COVID-19 pandemic marks the most significant, singular global disruption since World War II, with health, economic, political, and security implications that will ripple for years to come." -Global Trends 2040 (2021) Global Trends 2040-A More Contested World (2021), released by the US National Intelligence Council, is the latest report in its series of reports starting in 1997 about megatrends and the world's future. This report, strongly influenced by the COVID-19 pandemic, paints a bleak picture of the future and describes a contested, fragmented and turbulent world. It specifically discusses the four main trends that will shape tomorrow's world: - Demographics-by 2040, 1.4 billion people will be added mostly in Africa and South Asia. - Economics-increased government debt and concentrated economic power will escalate problems for the poor and middleclass. - Climate-a hotter world will increase water, food, and health insecurity. - Technology-the emergence of new technologies could both solve and cause problems for human life. Students of trends, policymakers, entrepreneurs, academics, journalists and anyone eager for a glimpse into the next decades, will find this report, with colored graphs, essential reading.