Low energy ion beam dynamics of NANOGAN ECR ion source

Kumar, Sarvesh; Mandal, A.

doi:10.1016/j.nima.2016.01.029

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Nanogan ECR source [23][24][25] has an all permanent magnetic confinement using NdFeB structure where the electrons diffuse from the high-pressure injection side to the low-pressure extraction side within the confined plasma. In order to confine the plasma in all possible directions, the magnetic field due to a Halbach type multipole increases radially towards the chamber walls for radial confinement and a longitudinal field due to solenoids creates magnetic mirror configuration with loss cone at the extraction side of the ion source.…”

Section: Experimental Detail and Observationsmentioning

confidence: 99%

“…The oxygen beam is tuned at 250 kV potential from the ECR source. The beam is analyzed in the 90-degree beam line of a switching cum analyzing magnet [23] for possible charge states of oxygen ions. The mass spectrum is taken by scanning the magnetic field and observing the currents of the analyzed beam on the Faraday cup and is shown in Fig.…”

Section: Experimental Detail and Observationsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Kumar

Sharma

et al. 2018

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

The plasma instabilities play an important role in an electron cyclotron resonance (ECR) ion source for the production of intense heavy ion beams in high charge states for particle accelerators. The geometrical and operational constraints of ECR sources hinder the trapping of ions for a sufficient time to get fully ionized with maximum efficiency. This problem is looked at in detail by studying the plasma instabilities in ECR ion sources. The ECR environment is full of complex rearrangements of various electric and magnetic fields to define a sustainable trap for the ions. The maximum frequency of plasma instability has been observed to be of 122.5 kHz under a set of sustainable plasma parameters. However, this limit may be pushed further if the plasma is overdriven in terms of source parameters. The instabilities cover a full regime of few tens of Hz to few hundreds of kHz under various operating conditions of radio frequency (rf), negative bias voltage, rf power and injection gas pressure. The rigorous details of frequencies and amplitudes of plasma instabilities are being reported by studying the Fourier spectrum of extracted and analyzed beam intensity. The plasma instabilities are attributed as drift waves in an inhomogeneous ECR plasma generated by the application of radio-frequency fields.

show abstract

Section: Experimental Detail and Observationsmentioning

confidence: 99%

Section: Experimental Detail and Observationsmentioning

confidence: 99%

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Kumar

Sharma

et al. 2018

Phys. Rev. Accel. Beams

Self Cite

View full text Add to dashboard Cite

show abstract

“…The experimental arrangement to study plasma instabilities in low energy ion beam facility [22][23][24][25] is as shown in figure 1. The beam is extracted from the ECR plasma and is analysed for various charge states.…”

Section: Methodsmentioning

confidence: 99%

Observations of parametric drift wave instabilities in an electron cyclotron resonance ion source

Kumar¹,

Sharma²,

Sharma³

et al. 2020

Plasma Phys. Control. Fusion

Self Cite

View full text Add to dashboard Cite

The parametric drift wave instabilities in a magnetically confined plasma such as electron cyclotron resonance (ECR) ion source, have been observed by Fourier transform of beam current oscillations using a spectrum analyzer. The beam current oscillations are found to have frequencies in the range from few tens of Hz to few hundreds of kHz and are tunable over a wide range by varying the ECR parameters. These oscillations are attributed to drift waves and found to have sub-structural frequencies symmetrically on either side. They exist for every ion beam extracted from the ECR ion source. These observations made with oxygen plasma have been validated with xenon plasma and theoretically justified as drift waves by the local slab model for magnetically confined plasmas. Such drift waves may be used as a diagnostic tool to improve the performance of ECR ion source.

show abstract

Development, installation, and offline-beam testing of a chopping and deflecting system for the High Current Injector at IUAC

Kedia

Mehta

2021

Vacuum

View full text Add to dashboard Cite

Low energy ion beam dynamics of NANOGAN ECR ion source

Cited by 4 publications

References 10 publications

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Observations of parametric drift wave instabilities in an electron cyclotron resonance ion source

Development, installation, and offline-beam testing of a chopping and deflecting system for the High Current Injector at IUAC

Contact Info

Product

Resources

About