IPAC2013 - List of Keywords (induction)

Paper	Title	Other Keywords	Page
MOPME047	Simulation of a Beam Angel Monitor using the Axial B-dot Field	simulation, monitoring, coupling, dipole	580
	J. Pang, X. He, Q. Li, C. Ma CAEP/IFP, Mainyang, Sichuan, People's Republic of China
	Funding: The National Natural Science Foundation of China A beam angel monitor using the axial B-dot field was presented recently while the one using azimuthal B-dot field had been widely employed to measure the beam positions for more than ten years. Basing on the principle of the proportionality between the deflection angel and the difference of axial B field with corresponding positions, the axial B-dot monitor has a potential use for beam deflection angle measurement directly. A test stand was built to test and improve the axial B-dot monitor, which is fabricated as a PCB structure. Meanwhile, simulations using the CST MWS code have been performed, demonstrating a good agreement to the test results and giving some advice to suppress the disturbance of position deviation of the beam.

MOPWA017	Design of the 500 kA Linear Transformer Driver Stage	simulation, pulsed-power, damping, high-voltage	696
	T.X. Liang, X.F. Jiang, A.C. Qiu, F.J. Sun, Z.G. Wang, J.H. Yin, Z. Zhang NINT, Xi'an, People's Republic of China
	Funding: Supported by the funding of National Natural Science of China (Grant No. 51077111) and Stage Key Laboratory of Electrical Insulation and Power Equipment(Grant No.51077111) , Xi’an Jiaotong Univercity. Linear transformer driver (LTD) is a novel fast discharge high pulsed power source. It can realize many LTD stages in series or parallel conveniently, and can directly acquire 100~200ns high power pulse. The pulse maybe realizes to directly drive load without any pulse compressing and forming unit. This paper introduces the latest development of fast LTD technology in abroad. The 100kV/500kA LTD stage with the rise time of 150ns has been designed. The stage is consisting of 20 discharging bricks in parallel. The simplified circuit model of LTD stage is given and the output parameters are simulated with universal circuit simulation software program, and the matched load current of 500kA and the rise time of about 150ns is obtained at the charging voltage of the capacitors about ±80kV. Tianxue Liang is with the State Key Laboratory of Environment Simulation and Effect for Intense Pulsed Radiation, Northwest Institute of Nuclear Technology, P. O. Box 69-10, Xi’an 710024, China(phone:86-029-84767380; e-mail: liangtxlkk@163.com).

TUPWA058	Experimental Study of Soliton Wave Trains in Intense Electron Beams	electron, space-charge, simulation, laser	1835
	Y. Mo, B.L. Beaudoin, D.W. Feldman, I. Haber, R.A. Kishek, P.G. O'Shea UMD, College Park, Maryland, USA
	Funding: Supported by the US Dept. of Energy, Office of High Energy Physics, and by the US Dept. of Defense, Office of Naval Research and the Joint Technology Office. Longitudinal perturbations in intense beams can lead to instabilities or degradation of beam quality, ultimately affecting the performance of accelerators, especially near the source where space charge is important. In this experimental study, conducted on the University of Maryland Electron Ring (UMER), large-amplitude perturbations are purposefully generated and their propagation observed over a long transport length. It is found that narrow, large-amplitude perturbations on a long-pulse beam develop into Korteweg-deVries (KdV) type soliton wave trains. Each peak in the wave train has a constant width and amplitude over a long propagation distance, with the amplitude inversely proportional to the square of the width. Furthermore, two such pulses are seen to interact with each other and emerge from the collision unchanged. The experimental data is compared with the KdV model and particle-in-cell simulations with good agreement. We induce perturbations using two methods: using photoemission to perturb the density at the cathode, or using an induction cell to directly perturb particle velocities.

THPEA033	Electronics for Precise Measurements of Accelerator Pulsed Magnets	extraction, injection, booster, septum	3216
	A.V. Pavlenko, A.M. Batrakov, I.V. Ilyin BINP SB RAS, Novosibirsk, Russia
	Injection and extraction systems of modern accelerator complexes have high requirements for measurements accuracy of pulsed magnets field parameters. To satisfy these demands the fast and precision digital integrators were elaborated in BINP, Russia. These devices are intended for measurements in pulsed magnets (septum magnets, bumps, etc.) with the field duration, ranging from 5 μs, providing a relative accuracy better than 5•10^-5. The set of these devices are the main measuring electronics in injection and extraction section of 3 GeV Booster Ring at NSLS-II facility, which is under construction now in BNL (USA).

Paper

Title

Other Keywords

Page

MOPME047

Simulation of a Beam Angel Monitor using the Axial B-dot Field

simulation, monitoring, coupling, dipole

580

J. Pang, X. He, Q. Li, C. Ma
CAEP/IFP, Mainyang, Sichuan, People's Republic of China

Funding: The National Natural Science Foundation of China
A beam angel monitor using the axial B-dot field was presented recently while the one using azimuthal B-dot field had been widely employed to measure the beam positions for more than ten years. Basing on the principle of the proportionality between the deflection angel and the difference of axial B field with corresponding positions, the axial B-dot monitor has a potential use for beam deflection angle measurement directly. A test stand was built to test and improve the axial B-dot monitor, which is fabricated as a PCB structure. Meanwhile, simulations using the CST MWS code have been performed, demonstrating a good agreement to the test results and giving some advice to suppress the disturbance of position deviation of the beam.

MOPWA017

Design of the 500 kA Linear Transformer Driver Stage

simulation, pulsed-power, damping, high-voltage

696

T.X. Liang, X.F. Jiang, A.C. Qiu, F.J. Sun, Z.G. Wang, J.H. Yin, Z. Zhang
NINT, Xi'an, People's Republic of China

Funding: Supported by the funding of National Natural Science of China (Grant No. 51077111) and Stage Key Laboratory of Electrical Insulation and Power Equipment(Grant No.51077111) , Xi’an Jiaotong Univercity.
Linear transformer driver (LTD) is a novel fast discharge high pulsed power source. It can realize many LTD stages in series or parallel conveniently, and can directly acquire 100~200ns high power pulse. The pulse maybe realizes to directly drive load without any pulse compressing and forming unit. This paper introduces the latest development of fast LTD technology in abroad. The 100kV/500kA LTD stage with the rise time of 150ns has been designed. The stage is consisting of 20 discharging bricks in parallel. The simplified circuit model of LTD stage is given and the output parameters are simulated with universal circuit simulation software program, and the matched load current of 500kA and the rise time of about 150ns is obtained at the charging voltage of the capacitors about ±80kV.
Tianxue Liang is with the State Key Laboratory of Environment Simulation and Effect for Intense Pulsed Radiation, Northwest Institute of Nuclear Technology, P. O. Box 69-10, Xi’an 710024, China(phone:86-029-84767380; e-mail: liangtxlkk@163.com).

TUPWA058

Experimental Study of Soliton Wave Trains in Intense Electron Beams

electron, space-charge, simulation, laser

1835

Y. Mo, B.L. Beaudoin, D.W. Feldman, I. Haber, R.A. Kishek, P.G. O'Shea
UMD, College Park, Maryland, USA

Funding: Supported by the US Dept. of Energy, Office of High Energy Physics, and by the US Dept. of Defense, Office of Naval Research and the Joint Technology Office.
Longitudinal perturbations in intense beams can lead to instabilities or degradation of beam quality, ultimately affecting the performance of accelerators, especially near the source where space charge is important. In this experimental study, conducted on the University of Maryland Electron Ring (UMER), large-amplitude perturbations are purposefully generated and their propagation observed over a long transport length. It is found that narrow, large-amplitude perturbations on a long-pulse beam develop into Korteweg-deVries (KdV) type soliton wave trains. Each peak in the wave train has a constant width and amplitude over a long propagation distance, with the amplitude inversely proportional to the square of the width. Furthermore, two such pulses are seen to interact with each other and emerge from the collision unchanged. The experimental data is compared with the KdV model and particle-in-cell simulations with good agreement. We induce perturbations using two methods: using photoemission to perturb the density at the cathode, or using an induction cell to directly perturb particle velocities.

THPEA033

Electronics for Precise Measurements of Accelerator Pulsed Magnets

extraction, injection, booster, septum

3216

A.V. Pavlenko, A.M. Batrakov, I.V. Ilyin
BINP SB RAS, Novosibirsk, Russia

Injection and extraction systems of modern accelerator complexes have high requirements for measurements accuracy of pulsed magnets field parameters. To satisfy these demands the fast and precision digital integrators were elaborated in BINP, Russia. These devices are intended for measurements in pulsed magnets (septum magnets, bumps, etc.) with the field duration, ranging from 5 μs, providing a relative accuracy better than 5•10^-5. The set of these devices are the main measuring electronics in injection and extraction section of 3 GeV Booster Ring at NSLS-II facility, which is under construction now in BNL (USA).