NIO1 (Negative Ion Optimization 1) is a versatile ion source designed to study the physics of production and acceleration of H- beams up to 60 keV. In ion sources, the gas is steadily injected in the plasma source to sustain the discharge, while high vacuum is maintained by a dedicated pumping system located in the vessel. In this paper, the three dimensional gas flow in NIO1 is studied in the molecular flow regime by the Avocado code. The analysis of the gas density profile along the accelerator considers the influence of effective gas temperature in the source, of the gas temperature accommodation by collisions at walls, and of the gas particle mass. The calculated source and vessel pressures are compared with experimental measurements in NIO1 during steady gas injection.
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February 2016
Research Article|
October 26 2015
Background gas density and beam losses in NIO1 beam source
E. Sartori;
E. Sartori
a)
1Consorzio RFX (CNR, ENEA, INFN,
Università di Padova
, Acciaierie Venete SpA), C.so Stati Uniti 4, 35127 Padova, Italy
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P. Veltri;
P. Veltri
1Consorzio RFX (CNR, ENEA, INFN,
Università di Padova
, Acciaierie Venete SpA), C.so Stati Uniti 4, 35127 Padova, Italy
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M. Cavenago
;
M. Cavenago
2INFN-LNL,
v.le dell’Università 2
, I-35020 Legnaro (PD), Italy
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G. Serianni
G. Serianni
1Consorzio RFX (CNR, ENEA, INFN,
Università di Padova
, Acciaierie Venete SpA), C.so Stati Uniti 4, 35127 Padova, Italy
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Contributed paper, published as part of the Proceedings of the 16th International Conference on Ion Sources, New York, New York, USA, August 2015.
Rev. Sci. Instrum. 87, 02B118 (2016)
Article history
Received:
August 21 2015
Accepted:
September 15 2015
Citation
E. Sartori, P. Veltri, M. Cavenago, G. Serianni; Background gas density and beam losses in NIO1 beam source. Rev. Sci. Instrum. 1 February 2016; 87 (2): 02B118. https://doi.org/10.1063/1.4932976
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