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                  <scp>n</scp>−A program for the simulation of positive ion extraction including magnetic fields

Becker, R.; Herrmannsfeldt, W.B.

doi:10.1063/1.1142795

Cited by 184 publications

(72 citation statements)

References 5 publications

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“…The specifications of the extraction system are shown in Table 3. Simulation of the extraction system was carried out using IGUN [9] and results converted to x-x 0 and y-y 0 phase space with skewed beam dynamics considered [10]. Fig.…”

Section: Extraction Systemmentioning

confidence: 99%

Design of a compact all-permanent magnet ECR ion source injector for ReA at the MSU NSCL

Pham

Leitner

Glennon

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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Keywords:Compact ECR ion source Permanent magnet ECR Low energy beam transport Heavy ion beams a b s t r a c tThe design of a compact all-permanent magnet electron cyclotron resonance (ECR) ion source injector for the ReAccelerator Facility (ReA) at the Michigan State University (MSU) National Superconducting Cyclotron Laboratory (NSCL) is currently being carried out. The ECR ion source injector will complement the electron beam ion trap (EBIT) charge breeder as an off-line stable ion beam injector for the ReA linac. The objective of the ECR ion source injector is to provide continuous-wave beams of heavy ions from hydrogen to masses up to 136 Xe within the ReA charge-to-mass ratio (Q =A) operational range from 0.2 to 0.5. The ECR ion source will be mounted on a high-voltage platform that can be adjusted to obtain the required 12 keV/u injection energy into a room temperature radio-frequency quadrupole (RFQ) for further acceleration. The beam line consists of a 30 kV tetrode extraction system, mass analyzing section, and optical matching section for injection into the existing ReA low energy beam transport (LEBT) line. The design of the ECR ion source and the associated beam line are discussed.

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Section: Extraction Systemmentioning

confidence: 99%

Design of a compact all-permanent magnet ECR ion source injector for ReA at the MSU NSCL

Pham

Leitner

Glennon

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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show abstract

“…(See Figure 2, region II: The extraction system) WARP includes both a two-dimensional, axially symmetric plasma sheath extraction model similar to IGUN [11] and a three-dimensional sheath extraction model comparable to KOBRA [12]. In order to allow for sufficient resolution at the plasma sheath while keeping the simulation time reasonable, the following two-step approach has been taken:…”

Section: Extraction Simulationmentioning

confidence: 99%

Comparison of extraction and beam transport simulations with emittance measurements from the ECR ion source venus

Winklehner¹,

Todd²,

Benitez³

et al. 2010

J. Inst.

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The versatility of ECR (Electron Cyclotron Resonance) ion sources makes them the injector of choice for many heavy ion accelerators. However, the design of the LEBT (Low Energy Beam Transport) systems for these devices is challenging, because it has to be matched for a wide variety of ions. In addition, due to the magnetic confinement fields, the ion density distribution across the extraction aperture is inhomogeneous and charge state dependent. In addition, the ion beam is extracted from a region of high axial magnetic field, which adds a rotational component to the beam. In this paper the development of a simulation model (in particular the initial conditions at the extraction aperture) for ECR ion source beams is described. Extraction from the plasma and transport through the beam line are then simulated with the particle-in-cell code WARP. Simulations of the multispecies beam containing Uranium ions of charge state 18+ to 42+ and oxygen ions extracted from the VENUS ECR ion source are presented and compared to experimentally obtained emittance values.

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“…IGUN [3] is a 2D ray-tracing simulation code that is designed for the simulation of ion extraction and transportation in electrostatic and magneto-static systems. The code is based on an electron ray-tracing code (EGUN) with additional modelling of the compensation of the ion space-charge by electrons in a plasma.…”

Section: Igunmentioning

confidence: 99%

Comparison of simulation codes for the beam dynamics of low-energy ions

Hanke

Heising

Probert

et al. 2002

Review of Scientific Instruments

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Results are presented of the simulation of low-energy ion dynamics with three different codes: KOBRA, IGUN and CPO. To share work between different codes one needs to be confident that they agree. For test cases, good agreement was found between the codes and analytical solutions. Where possible, results have been compared to experimental data from the CERN Laser Ion Source. These simulations are in general agreement with the data of the real beam line.c The following article has been submitted to Review of Scientific Instruments. After it is published, it will be found at http://ojps.aip.org/rsio/.Presented at ICIS2001, Oakland, California, USA 3-7 September 2001 Geneva, Switzerland October 2001 IntroductionSimulation of the extraction and low-energy transport of ions is a complex problem. In the case of the CERN Laser Ions Source (LIS) the beam is space-charge dominated and consists of a variety of charge states. To simulate the transport of beams through electrostatic fields, one starts from a set of measured beam parameters at the entry of the beam line. The result of the tracking depends then on the precision of the measurement, the field solver and the integration routine for the equation of motion of the particles.The simulation of particle transport in the space-charge domain can be shared between different codes if they have been cross-checked against each other. At CERN, the three codes KOBRA, IGUN and CPO are available. We have cross-checked these codes against each other with simple examples and have compared the results with experimental data available from the CERN LIS. The input beam distribution was identical for all codes. The codes were compared using two tests:1. Expansion of a space-charge dominated beam in a drift region without external fields; 2. Transport of particles in the electrostatic field of a Gridded Electrostatic Lens (GEL) [1] as used on the CERN LIS (see later description).

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i g u n−A program for the simulation of positive ion extraction including magnetic fields

Cited by 184 publications

References 5 publications

Design of a compact all-permanent magnet ECR ion source injector for ReA at the MSU NSCL

Design of a compact all-permanent magnet ECR ion source injector for ReA at the MSU NSCL

Comparison of extraction and beam transport simulations with emittance measurements from the ECR ion source venus

Comparison of simulation codes for the beam dynamics of low-energy ions

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