Emittance and matching of ECR sources

Krauss-Vogt, W.; Beuscher, H.; Hagedoorn, H.L.; Reich, J.; Wucherer, P.

doi:10.1016/0168-9002(88)90586-4

Cited by 22 publications

(6 citation statements)

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“…The filled symbols are the emittance values, while the corresponding open symbols are the beam currents for that particular ion species. We observe that the emittance values reduce with increasing mass, as reported in literature but that within a charge state distribution, the higher charge states have a lower emittance contrary to the behavior predicted by Krauss-Vogt et al 10 The explanation for the mass dependant behavior is due to the cooling of the heavier masses due to ion-ion collisions inside the plasma. 11,12 The charge state dependence shows that it is consistent with the model that highly charged ions are created closer to the axis of the plasma where the hot electrons are confined, which also confines the highest charge states in the potential well.…”

Section: A Single Gas Operationcontrasting

confidence: 60%

Studies of emittance of multiply charged ions extracted from high temperature superconducting electron cyclotron resonance ion source, PKDELIS

Rodrigues

Lakshmy

Kumar

et al. 2010

Review of Scientific Instruments

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For the high current injector project at Inter University Accelerator Centre, a high temperature superconducting electron cyclotron resonance (ECR) ion source, PKDELIS, would provide the high charge state ions. The emittance of the ECR ion source is an important parameter to design further beam transport system and to match the acceptances of the downstream radio frequency quadrupole and drift tube linac accelerators of the high current injector. The emittance of the analyzed beam of PKDELIS ECR source has been measured utilizing the three beam size technique. A slit and two beam profile monitors positioned at fixed distances from each other were used to measure the beam size. The digitized beam profiles have been analyzed to determine the emittance of various multiply charged ions. The variation of emittance with gas mixing, ultrahigh frequency power, and extraction energy are discussed in this presentation.

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Section: A Single Gas Operationcontrasting

confidence: 60%

Studies of emittance of multiply charged ions extracted from high temperature superconducting electron cyclotron resonance ion source, PKDELIS

Rodrigues

Lakshmy

Kumar

et al. 2010

Review of Scientific Instruments

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“…The emittance of the beam from the ion source is mainly dictated by the ions temperature, slit size of the plasma electrode, and the magnetic field in the extraction region. The normalised emittance of the extracted beam is given by 22,23 …”

Section: Resultsmentioning

confidence: 99%

Envelope equations for cylindrically symmetric space charge dominated multi species beam

2011

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We have derived differential equations for the beam envelope of a cylindrically symmetric space charge dominated multi-species beam. The major contribution here is the inclusion of the emittance growth of each species of the beam resulting from the nonlinear space charge effect of the other species which arises if the beam radius of that particular species is greater than the other species. In addition, we have also discussed the beam selection using slits and considered only the effective values of the current and emittance of each species after the slit for further transport in case the beam size of any species is larger than the slit size or the finite aperture of the beam pipe. Finally, we have studied the transport of proton from 2.45 GHz microwave ion source in the presence of H þ 2 , H þ 3 species to demonstrate the application of these results. Numerical results are presented for various values of the total beam current and different fractions of p, H þ 2 , and H þ 3 species.

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“…In non-dispersive plane. The normalized emittances are compared with the theoretical magnetic emittance described by Busch's theorem [17] for mass-to-charge (A/Q) ratio ranging from 1 to 16 and aperture radius at the source extraction ranging from 0.5 mm and 2.5 mm. Figure 9 shows the normalized emittance plotted against the A/Q ratio.…”

Section: Experimental and Simulation Setupmentioning

confidence: 99%

Upgrade and Improvement of the TRIUMF ECRIS Charge State Booster

Adegun,

Ames,

Kester

2024

J. Phys.: Conf. Ser.

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Recently, the RF system of the TRIUMF electron cyclotron resonance ion source charge state booster (ECRIS CSB) underwent an upgrade to implement two-frequency heating using a single waveguide. The injection and extraction optics, as well as the injection and extraction systems, were carefully modelled and systematically optimized to improve the efficiency and beam quality of the charge state booster. With optimized plasma and beam optics under the single-frequency heating regime, the maximum charge state of the 133Cs isotope produced was 27+, with the peak of the charge state distribution at Cs23+ with an efficiency of 8.5 %. However, with the implementation of two-frequency heating, the maximum charge state of Cs that can be produced increased to 32+, and the charge state distribution’s peak shifted to Cs26+ with an efficiency of 9.1 %. Additionally, the two-frequency heating resulted in a total beam RMS emittance that was approximately half of the one that was measured under the single-frequency heating due to the more pronounced negative potential dip created at the plasma center.

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Emittance and matching of ECR sources

Cited by 22 publications

References 0 publications

Studies of emittance of multiply charged ions extracted from high temperature superconducting electron cyclotron resonance ion source, PKDELIS

Studies of emittance of multiply charged ions extracted from high temperature superconducting electron cyclotron resonance ion source, PKDELIS

Envelope equations for cylindrically symmetric space charge dominated multi species beam

Upgrade and Improvement of the TRIUMF ECRIS Charge State Booster

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