Send to

Choose Destination
See comment in PubMed Commons below
Rev Sci Instrum. 2014 Feb;85(2):02B308. doi: 10.1063/1.4827677.

Comparative study of beam losses and heat loads reduction methods in MITICA beam source.

Author information

Consorzio RFX, Euratom-ENEA association, Stati Uniti 4, 35127 Padova, Italy.


In negative ion electrostatic accelerators a considerable fraction of extracted ions is lost by collision processes causing efficiency loss and heat deposition over the components. Stripping is proportional to the local density of gas, which is steadily injected in the plasma source; its pumping from the extraction and acceleration stages is a key functionality for the prototype of the ITER Neutral Beam Injector, and it can be simulated with the 3D code AVOCADO. Different geometric solutions were tested aiming at the reduction of the gas density. The parameter space considered is limited by constraints given by optics, aiming, voltage holding, beam uniformity, and mechanical feasibility. The guidelines of the optimization process are presented together with the proposed solutions and the results of numerical simulations.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Institute of Physics
    Loading ...
    Support Center