PIC code simulations of collective effects in the space-charge-dominated beam of the University of Maryland Electron Ring (UMER)

Kishek, R. A.; Bernal, S.; Li, Y.; Reiser, M.; Venturini, M.; Haber, I.; Godlove, Terry F.

doi:10.1109/pac.1999.794250

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…The experimental results were compared with simulation studies using the WARP code [8]. Agreement was excellent and gave us confidence in the extensive simulation work on beam propagation through the ring itself [9]. A new theoretical model of space-charge dominated beams in a circular lattice was used to derive a set of coupled rms envelope equations for studying rms beam behavior in rings and bending lines and for the design of combined betatron and dispersion matching for beam injection into a ring [10].…”

Section: Prototype Experiments and Theoretical Studiesmentioning

confidence: 92%

The Maryland electron ring for investigating space-charge dominated beams in a circular fodo system

Reiser

O’Shea

Kishek

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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The University of Maryland Electron Ring (UMER), currently under construction, has been designed to study the physics of space-charge dominated beams at extremely large values of the betatron tune shift which exceed those of existing strong-focusing synchrotrons and rings by more than an order of magnitude. In this paper, the unique design features of this research facility, the new beam physics to be investigated, and recent experimental results in the injector prototype as well as simulation studies will be reviewed.

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Section: Prototype Experiments and Theoretical Studiesmentioning

confidence: 92%

The Maryland electron ring for investigating space-charge dominated beams in a circular fodo system

Reiser

O’Shea

Kishek

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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“…The result shows that there is no large difference in emittance growth, and therefore verifies the field linearity of the design. [6] …”

Section: Effect To Beam By Simulationmentioning

confidence: 99%

Design, simulation and test of pulsed Panofsky quadrupoles

Chin²,

Kishek³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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Two Panofsky quadrupoles with rectangular aperture and fast rise time are proposed for the injection area in the University of Maryland electron ring project (UMER) [1,2,3]. The theoretical current distribution needed on the surface of a rectangular aperture to produce a quadrupole field is derived [4]. The conductor location is determined mostly by the theoretical current distribution, with some free factors to optimise the field. The design is based on the linearity of longitudinal integrated field. Each quadrant of the Panofsky quadrupole consists of 10 loops of conductors to minimize inductance while retaining the field quality. A 2:1 scaled model has been made and the magnetic field was measured. Two 1:1 models have been made to measure inductance, mutual inductance and the rise time. Simulations of beam propagation with Panofsky quadrupoles demonstrated the linearity of the design.

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Beam Injection and Matching Studies at the University of Maryland Electron Ring (UMER)

Thangaraj¹,

Kishek²,

Bernal³

et al. 2006

AIP Conference Proceedings

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The University of Maryland Electron Ring (UMER) is a scaled model to investigate the physics of such intense beams. It uses a 10-keV electron beam along with other scaled beam parameters that model the larger machines but at a lower cost. Recently, multi turn operation of the ring (3.6 m diameter) has been achieved. In order to have full current transport of the electron beam, and to increase the number of turns of the beam around the ring, injection of the beam from the straight section into the ring becomes crucial. In this work, we report experimental results from the injection and matching of a space charge dominated beam and an emittance dominated beam. We also describe and analyze two methods of injection of the electron beam from the straight section into the ring. In one of the methods, the two injection quads are fixed to a preset value, while in the other both the injection quads are switched off (Collins injection).

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PIC code simulations of collective effects in the space-charge-dominated beam of the University of Maryland Electron Ring (UMER)

Cited by 4 publications

References 11 publications

The Maryland electron ring for investigating space-charge dominated beams in a circular fodo system

The Maryland electron ring for investigating space-charge dominated beams in a circular fodo system

Design, simulation and test of pulsed Panofsky quadrupoles

Beam Injection and Matching Studies at the University of Maryland Electron Ring (UMER)

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