Zobrazeno 1 - 10
of 132
pro vyhledávání: '"T.P. Wangler"'
Autor:
H.V. Smith, Ji Qiang, Richard L. Sheffield, Robert W. Garnett, P.L. Colestock, C.K. Allen, J.D. Schneider, K.R. Crandall, K.C.D. Chan, W. P. Lysenko, Martin Schulze, T.P. Wangler, John D. Gilpatrick
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 519:425-431
Progress was made during the past decade towards a better understanding of halo formation caused by beam mismatch in high-intensity beams. To test these ideas an experiment was carried out at Los Alamos with proton beams in a 52-quadrupole focusing c
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 379:21-40
In 1991 a space charge calculation for bunched beam with a three-dimensional ellipsoid was proposed, replacing the usual SCHEFF routines. It removes the cylindrical symmetry required in SCHEFF and avoids the point to point interaction computation, wh
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 15, Iss 9, p 090101 (2012)
We have developed high-efficiency normal-conducting rf accelerating structures by combining $H$-mode resonator cavities and a transverse beam focusing by permanent-magnet quadrupoles (PMQ), for beam velocities in the range of a few percent of the spe
Autor:
B. Blind, M. T. Wilson, G.H. Neuschaefer, G.P. Lawrence, Stanley O. Schriber, F.W. Guy, G. L. Varsamis, T.S. Bhatia, Robert A. Krakowski, N. M. Schnurr, T.P. Wangler
Publikováno v:
Nuclear Science and Engineering. 106:160-182
Publikováno v:
2007 IEEE Particle Accelerator Conference (PAC).
The radio-frequency quadrupole (RFQ) accelerator is the best structure immediately after an ion source for accelerating light-ion beams with considerable currents. On the other hand, the higher-energy part of the RFQ is known to be not a very efficie
Publikováno v:
Proceedings of the 2003 Bipolar/BiCMOS Circuits and Technology Meeting (IEEE Cat. No.03CH37440).
We compare macroparticle simulations with beam-profile measurements from a proton beam-halo experiment in a study of beam-halo formation in mismatched beams in a 52-quadrupole periodic-focusing channel. The lack of detailed measurement of the initial
Autor:
T.P. Wangler, T.S. Wang
Publikováno v:
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366).
This work is an attempt to explore possible techniques to graphically display the dynamics of halo particles for a mismatched beam in a periodic-focusing lattice. It is found that by using the particle-core model and a suitable change of the phase-sp
Publikováno v:
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366).
Our design approach takes advantage of the large velocity acceptance of the superconducting cavities. As a guide to an initial layout, an analytic model of multi-cell cavities excited in a n-mode was used to provide an expression for the transit-time
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
Results of numerical beam-dynamics studies for both the radiofrequency quadrupole (RFQ) and the drift-tube linac (DTL) are presented. The scaling of longitudinal emittance produced during the adiabatic bunching in an RFQ is discussed. The benefits of
Publikováno v:
Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.
A collaborative study by Los Alamos and Brookhaven National Laboratories investigating a facility to produce tritium for the USA's defense needs indicates that a 1.6-GeV, 250-mA proton accelerator is required. A reference design of this accelerator s