Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Measurement of the space charge effect of a negative hydrogen ion beam. / Bykov, T.; Kasatov, D.; Kolesnikov, Ia и др.
6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018. ред. / Y Belchenko; A Sanin. Том 2052 American Institute of Physics Inc., 2018. 070004 (AIP Conference Proceedings; Том 2052).Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
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TY - GEN
T1 - Measurement of the space charge effect of a negative hydrogen ion beam
AU - Bykov, T.
AU - Kasatov, D.
AU - Kolesnikov, Ia
AU - Koshkarev, A.
AU - Makarov, A.
AU - Ostreinov, Yu
AU - Shchudlo, I.
AU - Sokolova, E.
AU - Sorokin, I.
AU - Taskaev, S.
N1 - Publisher Copyright: © 2018 Author(s).
PY - 2018/12/28
Y1 - 2018/12/28
N2 - 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.
AB - 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.
KW - ACCELERATOR
UR - http://www.scopus.com/inward/record.url?scp=85059606113&partnerID=8YFLogxK
U2 - 10.1063/1.5083784
DO - 10.1063/1.5083784
M3 - Conference contribution
AN - SCOPUS:85059606113
VL - 2052
T3 - AIP Conference Proceedings
BT - 6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018
A2 - Belchenko, Y
A2 - Sanin, A
PB - American Institute of Physics Inc.
T2 - 6th International Symposium on Negative Ions, Beams and Sources, NIBS 2018
Y2 - 3 September 2018 through 7 September 2018
ER -
ID: 18064854