The University of Maryland Electron Ring (UMER)

O’Shea, P.G.; Beaudoin, B.; Bernal, S.; Cui, Yaodong; Feldman, D. W.; Glanzer, M.; Godlove, Terry F.; Harris, John R.; Holland, M.; Li, H.; Kishek, R. A.; Quinn, B.; Rahimi, Nina; Reiser, M.; Valfells, Á.; Virgo, M.; Walter, M.; Yun, R.; Yun, V.; Kehne, D.

doi:10.1109/pac.2001.987458

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…The University of Maryland Electron Ring (UMER) is a special, low-cost, scaled, electron storage ring designed for research in intensive beam physics in order to understand the physics of applications of intensive beams [7,8,9]. More details on UMER can be found in Section 1.2.…”

Section: Background and Motivationmentioning

confidence: 99%

“…The experiment is implemented on the facility of University of Maryland Electron Ring (UMER) [7]. The schematic of the whole experimental system is shown in the The Y section we use in the experiment is the part of the injection section, which includes SD6, YQ (Y-section big quadrupole) and PD (the pulsed dipole), also QR1 (the first ring quadrupole).…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Experiments on Injection into University of Maryland Electron Ring

Bai¹,

Kishek²,

Beaudoin³

et al. 2006

AIP Conference Proceedings

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The University of Maryland Electron Ring (UMER) is built as a low-cost testbed for intense beam physics for benefit of larger ion accelerators. The beam intensity is designed to be variable, spanning the entire range from low current operation to highly space-charge-dominated transport. The ring has been closed and multi-turn commissioning has begun. One of the biggest challenges of multi-turn operation of UMER is correctly operating the Y-shaped injection/recirculation section, which is specially designed for UMER multi-turn operation. It is a challenge because the system requires several quadrupoles and dipoles in a very stringent space, resulting in mechanical, electrical, and beam control complexities. Also, the earth's magnetic field and the image charge effects have to be investigated because they are strong enough to impact the beam centroid motion. This thesis presents both simulation and experimental study of the beam centroid motion in the injection region to address above issues.

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Section: Background and Motivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Experiments on Injection into University of Maryland Electron Ring

Bai¹,

Kishek²,

Beaudoin³

et al. 2006

AIP Conference Proceedings

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“…The University of Maryland electron ring (UMER) experiment [1,2], currently under construction, will be used to investigate the dynamics of space charge dominated low energy (10keV) electron beams. One point of interest is the energy distribution in the beam.…”

Section: Introductionmentioning

confidence: 99%

Energy analyzer experiments for the University of Maryland electron ring

Valfells

Bernal²,

Cui³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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The University of Maryland electron ring (UMER) experiment [1,2], currently under construction, will be used to investigate the dynamics of space charge dominated low energy (10keV) electron beams. One point of interest is the energy distribution in the beam. We use an energy analyzer of cylindrical geometry to determine the longitudinal energy of the electron beam. The data can be resolved temporally, which gives an indication of the axial energy distribution in the beamlets. We also have the capability of scanning the beam in the transverse direction so that a lateral distribution of the longitudinal energy may be determined. We present results of energy spread measurements from the injector region of UMER under various conditions. Later efforts will include the effects of bending on the energy spread in the beam.

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“…The University of Maryland Electron Ring (UMER) [1,2] has been designed to examine the physics of a highly space-charge-dominated electron beam as it propagates through hundreds of periods in an alternatinggradient transport system. Because this experimental apparatus can access a range of beam parameters not heretofore accessible, considerable effort has been expended in the careful design of a comprehensive set of beam diagnostics so that the beam can be accurately characterized and the physics clearly understood.…”

Section: Introductionmentioning

confidence: 99%

“…

AbstractAn important feature of the UMER experimental program [1,2] is the continuing use of comparison between computer simulation and experimental measurement. These comparisons have, for example, explained several significant features observed in the prototype injector experiment.

…”

mentioning

confidence: 99%

Computer simulation of the UMER electron gun

Haber

Bernal²,

Kishek³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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An important feature of the UMER experimental program [1,2] is the continuing use of comparison between computer simulation and experimental measurement. These comparisons have, for example, explained several significant features observed in the prototype injector experiment. Therefore, during assembly and testing of the UMER injector two-and threedimensional simulations are being conducted with the aim of understanding the space-charge-dominated physics in the gun and injector transport sections, as well as interpreting experimental data. These simulations are important to providing a realistic initial beam distribution for simulating beam dynamics in the main ring. Emphasis here is on simulating the beam propagation in the gun region between the cathode grid and the anode grid for comparison with measurements at the exit from the gun structure.

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The University of Maryland Electron Ring (UMER)

Cited by 10 publications

References 9 publications

Modeling and Experiments on Injection into University of Maryland Electron Ring

Modeling and Experiments on Injection into University of Maryland Electron Ring

Energy analyzer experiments for the University of Maryland electron ring

Computer simulation of the UMER electron gun

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