Anmin Guan, Suifu Wang, Yilin Sun, et al. Emittance of heavy ion beam extracted from Nielsen ion source[J]. Nuclear techniques, 1986, 09(1): 38-40,62.DOI:
) extracted from Nielsen source was measured. The measurements of emittance with slit-probe method were performed on a test bench at different positions of the beam line (in front of and behind the annalyzing magnet).The measuring errors of emittance were corrected with different focusing voltages of einzellens.
The experimental results showed that the emittances were different with the gap of the extraction
the shape of the plasma boundary and the increase of the ion mass and intensity of ion beams.
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references
J. Heinemeir and P. Tykesson , Production of negative heavy ion beam by charge exchange in metal vapour , Proceeding of the I international conference on electrostatic accelerator techrology , 1977 .