TY - GEN

T1 - Upgrades of a vacuum insulated tandem accelerators for obtaining required voltage without breakdowns

AU - Sorokin, I.

AU - Kolesnikov, Ia

AU - Makarov, A.

AU - Schudlo, I.

AU - Taskaev, S.

N1 - Funding Information: The study has supported by the Russian Science Foundation (project No. 19-72-30005) and by the Budker Institute of Nuclear Physics. Publisher Copyright: © 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.

PY - 2021

Y1 - 2021

N2 - Epithermal neutron source based on an electrostatic tandem accelerator of a new type - Vacuum Insulation Tandem Accelerator, and lithium neutron target has been proposed and developed at BINP for Boron Neutron Capture Therapy - promising method for treatment of tumors. 2 MeV proton beam was obtained in the accelerator, the neutron generation carried out with bombardment of lithium target by protons, successful experiments on irradiation of cell cultures incubated in boron medium have been carried out, human glioblastoma grafted mice were cured. It is necessary to increase proton energy from 2 to 2.3 MeV to form a neutron beam suitable for the treatment of deep-seated tumors and to provide the high-voltage strength of the accelerator at a potential of 1.2 MV in order to suppress dark currents to an acceptably small value. Two upgrades to obtain the required potential were consistently implemented. At first, the glass rings of the feedthrough insulator were replaced by smooth ceramic ones doubled in height which made it possible to refuse placing the resistive divider inside. Then the smooth ceramic rings were replaced by the new ceramic rings with a ribbed outer surface. Modernization made it possible to obtain the required voltage of 1.15 MV in the accelerator without breakdowns. The report describes in detail the modernizations carried out, presents the results of the studies.

AB - Epithermal neutron source based on an electrostatic tandem accelerator of a new type - Vacuum Insulation Tandem Accelerator, and lithium neutron target has been proposed and developed at BINP for Boron Neutron Capture Therapy - promising method for treatment of tumors. 2 MeV proton beam was obtained in the accelerator, the neutron generation carried out with bombardment of lithium target by protons, successful experiments on irradiation of cell cultures incubated in boron medium have been carried out, human glioblastoma grafted mice were cured. It is necessary to increase proton energy from 2 to 2.3 MeV to form a neutron beam suitable for the treatment of deep-seated tumors and to provide the high-voltage strength of the accelerator at a potential of 1.2 MV in order to suppress dark currents to an acceptably small value. Two upgrades to obtain the required potential were consistently implemented. At first, the glass rings of the feedthrough insulator were replaced by smooth ceramic ones doubled in height which made it possible to refuse placing the resistive divider inside. Then the smooth ceramic rings were replaced by the new ceramic rings with a ribbed outer surface. Modernization made it possible to obtain the required voltage of 1.15 MV in the accelerator without breakdowns. The report describes in detail the modernizations carried out, presents the results of the studies.

UR - http://www.scopus.com/inward/record.url?scp=85130353994&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/6b6d86b6-9539-3dd1-812e-17553112eedc/

U2 - 10.18429/JACoW-RuPAC2021-MOPSA56

DO - 10.18429/JACoW-RuPAC2021-MOPSA56

M3 - Conference contribution

AN - SCOPUS:85130353994

SN - 9783954502400

T3 - CERN-Proceedings

SP - 228

EP - 230

BT - 27th Russian Particle Accelerator Conference, RuPAC 2021

A2 - Kuzin, Maksim

A2 - Schaa, Volker R W

PB - CERN

T2 - 27th Russian Particle Accelerator Conference, RuPAC 2021

Y2 - 27 September 2021 through 1 October 2021

ER -