نتایج جستجو برای: particle accelerator

تعداد نتایج: 189238  

2010
S. Pattalwar T. Jones J. Strachan H. Witte

PAMELA (Particle Accelerator for MEdicaL Applications) is a design study of a novel accelerator for cancer therapy using protons and carbon ions. The accelerator utilizes the nonscaling Fixed Field Alternating Gradient (FFAG) principle and features superconducting combined-function magnets with dipole, quadrupole, sextupole and octupole field components for steering the ion beam. The proton rin...

2006
Y. Shimosaki K. Takayama K. Torikai

Non-adiabatic features around the transition energy are well-known to be one of most important beam physics issues in most of circular hadron accelerators. A novel technique to avoid them by the adiabatic motion, a quasiadiabatic, nonfocusing transition-energy crossing (QNTC), was proposed. In a longitudinally separated function-type accelerator, in which particles are confined by an rf voltage...

1994
M. Lee P. Tran Y. Cai T. Chen J. Corbett M. Cornacchia P. Corredoura R. Genin S. Howry J. Irwin M. Minty P. Morton J-L. Pellegrin C. Pellegrini T. Raubenheimer D. Robin C. Wermelskirchen Y. Yan J. Yang

Many computer programs and a variety of models exist for the design of accelerator lattices and the correction of errors. Many physicists contributed to this work by developing codes to suit a variety of machines. At present, we are integrating some of these codes into a unified framework to design and control any type of machine. We will refer to this system of interactive accelerator design, ...

1999
Helmuth Spieler Ernest Orlando Lawrence

This tutorial paper provides an overview of design considerations for semiconductor radiation detectors and electronics in high radiation environments. Problems specific to particle accelerator applications are emphasized and many of the presented results originated in extensive studies of radiation effects in large scale particle detectors for the SSC and LHC. Basic radiation damage mechanisms...

2005
C. D. Barnes F. J. Decker M. J. Hogan R. Iverson D. K. Johnson P. Krejcik C. O’Connell C. Huang C. Joshi W. Lu K. A. Marsh

Evidence of particle trapping has been observed in a beam driven Plasma Wake Field Accelerator (PWFA) experiment, E164X, conducted at the Stanford Linear Accelerator Center by a collaboration which includes USC, UCLA and SLAC. Such trapping produces plasma dark current when the wakefield amplitude is above a threshold value and may place a limit on the maximum acceleration gradient in a PWFA. T...

2011
I. Batalov A. Valishev

The stability of non-linear Integrable Optics Test Accelerator (IOTA) model developed in [1] was tested. The area of the stable region in transverse coordinates and the maximum attainable tune spread were found as a function of non-linear lens strength. Particle loss as a function of turn number was analyzed to determine whether a dynamic aperture limitation present in the system. The system wa...

2013
Saravan Kumar Chandrasekaran Neil Wright

Superconducting radio frequency (SRF) cavities for particle accelerators are fabricated using high purity niobium to allow for continuous high power operation. A hot-spot generated at a surface defect during accelerator operation can quench superconductivity and limit its performance. Increased heat conduction to the liquid helium bath dissipates hot spots, maintaining performance. Properly tre...

Journal: :Symmetry 2016
Maxim Khlopov

The standard model involves particle symmetry and the mechanism of its breaking. Modern cosmology is based on inflationary models with baryosynthesis and dark matter/energy, which involves physics beyond the standard model. Studies of the physical basis of modern cosmology combine direct searches for new physics at accelerators with its indirect non-accelerator probes, in which cosmological con...

2008
Marcus Thomas Lidija Zivkovic John Parsons Gustaaf Brooijmans

1 Abstract According to the Standard Model of Particle Physics, all particles are necessarily mass-less. Obviously this is not the case. One attempt at reconciling the Standard Model's prediction with observed particle masses is the proposal that particles acquire mass through the interaction with a field that pervades all of space; the stronger the interaction, the greater the acquired mass. T...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1389

چکیده ندارد.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید