Electron cyclotron resonance ion source plasma characterization by X-ray spectroscopy and X-ray imaging

Castro, G.; Biri, S.; Rácz, R.; Pálinkás, J.; Caliri, Claudia; Celona, L.; Neri, L.; Romano, Francesco; Torrisi, G.; Gammino, S.

doi:10.1063/1.4939201

Cited by 38 publications

(59 citation statements)

References 11 publications

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“…SDD results revealed strong correlation between plasma and beam parameters (plasma parameters: X-ray counts, electron temperature and density; beam parameters: analysed beam intensity, average charge). The results revealed a surprisingly very good agreement between warm-electrons density fluctuations, output beam currents and the calculated electromagnetic modal density of the plasma chamber [14]. Several CCD pinhole-camera images were shown as example, pointing significant differences of the energy content and displacement of the plasma vs. microwave frequency.…”

Section: The Experimental Scenariomentioning

confidence: 74%

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Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Rácz

Biri

Caliri

et al. 2017

Plasma Sources Sci. Technol.

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Pinhole and CCD based quasi-optical X-ray imaging technique was applied to investigate the plasma of an Electron Cyclotron Resonance Ion Source. Spectrally integrated and energy resolved images were taken from an axial perspective. The comparison of integrated images taken of argon plasma highlights the structural changes affected by some ECRIS setting parameters, like strength of the axial magnetic confinement, RF frequency and microwave power. Photon counting analysis gives precise intensity distribution of the X-ray emitted by the argon plasma and by the plasma chamber walls. This advanced technique points out that the spatial positions of the electron losses are strongly determined by the kinetic energy of the electrons themselves to be lost and also shows evidences how strongly the plasma distribution is affected by slight changes in the RF frequency.

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Section: The Experimental Scenariomentioning

confidence: 74%

“…For 12.92 GHz the emission is decreasing monotonically from ROI-1 to ROI-4. This can explain the fact that at certain frequencies there is a non-perfect correlation between the volumetric emission and the trend of the Ar 4+ current, as evidenced in our previous paper [14].…”

Section: Effect Of the Rf Frequency To The Spectrally Resolved Imagesmentioning

confidence: 77%

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Rácz

Biri

Caliri

et al. 2017

Plasma Sources Sci. Technol.

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“…The airflow also causes change in discharge power, while breakdown voltage was found to be caused by metastable state species. 45 Voltage amplitude and gas flow rate method has also been applied to characterize plasma jet. However, this characterization method cannot effectively characterize the plasma discharge at low airflow.…”

Section: Characterization Of Plasmamentioning

confidence: 99%

A review on plasma combustion of fuel in internal combustion engines

et al. 2017

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Summary In recent years, new ways of improving the combustion efficiency of fuel during gas turbine operations have been developed. The most significant has been the application of plasma technology for the combustion of fuel in gas turbine operations. Plasma is formed when gas is exposed to either high temperature or high‐voltage electricity. This technology is very promising and has proven to enhance the performance of gas turbines and reduce toxic emissions. Recent studies have shown the use of different types of plasma applications in gas turbine operations such as plasma torch, filamentary discharge, and nanosecond pulse discharge, whose results show that plasma technology has great potential in improving flame stabilization, the fuel/air mixing ratio, and flash point values of these fuels. These findings and advances have further provided new opportunities in the development of efficient plasma discharges for practical uses in plasma combustion of fuel for gas turbine operations. This article is a comprehensive overview of the advances and blind spots in the knowledge of plasma combustion of fuel during internal combustion engine operations. This review also focuses on applications, methods, and experimental results in plasma combustion of fuel in gas turbines.

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“…9 Evaluation and detailed analysis of the data recorded with CCD pinhole camera are still in progress. The preliminary results coming from the pictures however are promising and shown here.…”

Section: Resultsmentioning

confidence: 99%

“…The scientific results obtained by using these two detectors are going to be published. 9 There is a major conformity in the data acquisition techniques: photos were taken in photon counting mode in both cases. Thousands of images were taken with experimentally adjusted short (milliseconds) exposure time while each pixels registered either 0 or 1 X-ray events.…”

Section: Comparison Of Experimental Techniquesmentioning

confidence: 99%

X-ray pinhole camera setups used in the Atomki ECR Laboratory for plasma diagnostics

Rácz

Biri

Pálinkás

et al. 2015

Review of Scientific Instruments

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Imaging of the electron cyclotron resonance (ECR) plasmas by using CCD camera in combination with a pinhole is a non-destructive diagnostics method to record the strongly inhomogeneous spatial density distribution of the X-ray emitted by the plasma and by the chamber walls. This method can provide information on the location of the collisions between warm electrons and multiple charged ions/atoms, opening the possibility to investigate the direct effect of the ion source tuning parameters to the plasma structure. The first successful experiment with a pinhole X-ray camera was carried out in the Atomki ECR Laboratory more than 10 years ago. The goal of that experiment was to make the first ECR X-ray photos and to carry out simple studies on the effect of some setting parameters (magnetic field, extraction, disc voltage, gas mixing, etc.). Recently, intensive efforts were taken to investigate now the effect of different RF resonant modes to the plasma structure. Comparing to the 2002 experiment, this campaign used wider instrumental stock: CCD camera with a lead pinhole was placed at the injection side allowing X-ray imaging and beam extraction simultaneously. Additionally, Silicon Drift Detector (SDD) and High Purity Germanium (HPGe) detectors were installed to characterize the volumetric X-ray emission rate caused by the warm and hot electron domains. In this paper, detailed comparison study on the two X-ray camera and detector setups and also on the technical and scientific goals of the experiments is presented. C 2015 AIP Publishing LLC. [http://dx

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Electron cyclotron resonance ion source plasma characterization by X-ray spectroscopy and X-ray imaging

Cited by 38 publications

References 11 publications

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

Electron cyclotron resonance ion source plasma characterization by energy dispersive x-ray imaging

A review on plasma combustion of fuel in internal combustion engines

X-ray pinhole camera setups used in the Atomki ECR Laboratory for plasma diagnostics

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