Research output: Contribution to journal › Article › peer-review
Update of ion-optical system of neutral beam of Tokamak à Configuration Variable. / Sorokin, A. V.; Akhmetov, T. D.; Brul, A. V. et al.
In: Review of Scientific Instruments, Vol. 91, No. 1, 013323, 01.01.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Update of ion-optical system of neutral beam of Tokamak à Configuration Variable
AU - Sorokin, A. V.
AU - Akhmetov, T. D.
AU - Brul, A. V.
AU - Davydenko, V. I.
AU - Ivanov, A. A.
AU - Karpushov, A. N.
AU - Mishagin, V. V.
AU - Shikhovtsev, I. V.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - An injector of fast deuterium atoms for plasma heating was designed and installed at the Tokamak à Configuration Variable (TCV). The neutral beam can deliver 1 MW power to the plasma in 2 s pulses. An ion beam of the injector is formed by a triode multislit ion-optical system with spherical electrodes which provide ballistic focusing. Tests at TCV revealed that the total angular divergence of the neutral beam across the slits exceeded the expected value more than twice. It was finally established that this increase in divergence was caused by the asymmetry of the chamfers at the slit edges of the plasma electrode. The redesigned shape of the slits of the plasma grid together with precise machining significantly improved the beam quality. Experimental testing proved that the neutral beam profile in the direction across the grid slits became very close to the expected value.
AB - An injector of fast deuterium atoms for plasma heating was designed and installed at the Tokamak à Configuration Variable (TCV). The neutral beam can deliver 1 MW power to the plasma in 2 s pulses. An ion beam of the injector is formed by a triode multislit ion-optical system with spherical electrodes which provide ballistic focusing. Tests at TCV revealed that the total angular divergence of the neutral beam across the slits exceeded the expected value more than twice. It was finally established that this increase in divergence was caused by the asymmetry of the chamfers at the slit edges of the plasma electrode. The redesigned shape of the slits of the plasma grid together with precise machining significantly improved the beam quality. Experimental testing proved that the neutral beam profile in the direction across the grid slits became very close to the expected value.
KW - DUCT
UR - http://www.scopus.com/inward/record.url?scp=85078443407&partnerID=8YFLogxK
U2 - 10.1063/1.5128569
DO - 10.1063/1.5128569
M3 - Article
C2 - 32012616
AN - SCOPUS:85078443407
VL - 91
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 1
M1 - 013323
ER -
ID: 23261960