Visible light spectrometry measurements for studying an ECRIS plasma and especially applied to the MONO1001 ion source

Abstract

The cylindrical geometry of the magnetic confinement of the MONO1001 electron cyclotron resonance ͑ECR͒ ion source made in GANIL ͓P. Jardin et al., Rev. Sci. Instrum. 73, 789 ͑2002͔͒ allows us to measure radial characteristics of the working ECR plasma with helium gas. The physical and the geometrical characteristics of the resonance surface inside the working ECR source have been quantified with the help of a visible light spectrometer. Hence, we have deduced a shape of the electron cyclotron resonance ion sources resonance surface which corresponds closely to our magnetic calculations.

3D-full wave and kinetics numerical modelling of electron cyclotron resonance ion sources plasma: steps towards self-consistency

“…In reference [8] results about 2D time-dependence PIC model were also mentioned, confirming this separation between inner/outer ECR surface plasma regions: a dense plasmoid surrounded by a rarefied halo. The result -although not self-consistently obtained by evaluating plasma effect on RF -was however in qualitative agreement with experimental results of Bibinov et al [17] and Tuske et al [18], they being among the few ones having performed spaceresolved measurements of plasma density through optical emission spectroscopy techniques [17,18]. Therefore, in the perspectives on the present paper -where we want to calculate plasma influence on RF and vice-versa -we can reasonably assume that the starting condition of the step k = 0 is given by a "plasmoid-halo" model.…”

Injected 1+ ion beam as a diagnostics tool of charge breeder ECR ion source plasmas

“…Several diagnostics methods have been applied for studying minimum-B ECRIS plasmas. These include Langmuir probes [13], bremsstrahlung [14][15][16][17] and x-ray [18][19][20] diagnostics, microwave interferometry [21], plasma diamagnetism [15,22], optical emission spectroscopy [23][24][25], and measurement of the plasma potential and energy spread of the extracted ion beams [26,27], for example. A comprehensive review of ECRIS plasma diagnostics is presented in [28].…”

ECR plasma photographs as a plasma diagnostic

“…The non-destroying feature of this method is certainly an advantage; the drawback is that the recorded information always corresponds to integration or superposition over a specific line-of-sight in the plasma volume. Previous VL [9][10][11], UV [12] and XR [13][14][15] imaging work and also plasma modeling studies [16][17][18][19] have shown that spatial imaging in any region gives important and new insight into the plasma structure and properties of the ECR plasma as well as the processes that create the radiation.…”