Measurement of the space charge effect of a negative hydrogen ion beam

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

A source of epithermal neutrons based on a vacuum-insulated tandem accelerator and a lithium target is developed for the technique of boron neutron capture therapy. A 2 MeV stationary proton beam with a current of up to 5 mA was obtained in the accelerator. With a view of increasing the current, the transport of a beam of negative hydrogen ions from the ion source to the accelerator is studied using a wire scanner OWS-30 (D-Pace, Canada) and a movable diaphragm. Dependences of the ion beam profile and the current on the residual gas pressure are measured and the influence of the space charge is detected. We measured the phase portrait of the beam in the radial and azimuth directions and discovered the effect produced by the aberrations of the focusing magnetic lens. We also gaged the value of the normalized beam emittance. The change in beam focusing mode and the introduction of optical diagnostics of the beam position in the diaphragm of the first accelerating electrode made it possible to significantly improve the stability of the accelerator operation at high current of the proton beam, up to 6.7 mA.

Язык оригиналаанглийский
Название основной публикации6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018
РедакторыY Belchenko, A Sanin
ИздательAmerican Institute of Physics Inc.
Число страниц7
Том2052
ISBN (электронное издание)9780735417809
DOI
СостояниеОпубликовано - 28 дек 2018
Событие6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018 - Academgorogok, Novosibirsk, Российская Федерация
Продолжительность: 3 сен 20187 сен 2018

Серия публикаций

НазваниеAIP Conference Proceedings
ИздательAMER INST PHYSICS
Том2052
ISSN (печатное издание)0094-243X

Конференция

Конференция6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018
СтранаРоссийская Федерация
ГородAcademgorogok, Novosibirsk
Период03.09.201807.09.2018

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    Bykov, T., Kasatov, D., Kolesnikov, I., Koshkarev, A., Makarov, A., Ostreinov, Y., Shchudlo, I., Sokolova, E., Sorokin, I., & Taskaev, S. (2018). Measurement of the space charge effect of a negative hydrogen ion beam. В Y. Belchenko, & A. Sanin (Ред.), 6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018 (Том 2052). [070004] (AIP Conference Proceedings; Том 2052). American Institute of Physics Inc.. https://doi.org/10.1063/1.5083784