Influence of the space charge of an ion beam on the time-of-flight diagnostics of its composition

A. Pushkarev, X. P. Zhu, C. C. Zhang, A. Prima, Y. Li, Yu Egorova, M. K. Lei

Research output: Contribution to journalArticle

Abstract

The results of time-of-flight diagnostics of the composition of high-intensity pulsed ion beams are presented. The experiments were performed on a diode of focusing and flat geometry, in the mode of self-magnetic insulation of electrons (accelerating voltage 250-300 kV, pulse duration 120 ns, ion current density 20-300 A/cm2), and a focusing diode in an external magnetic insulation mode (300 kV, 80 ns, 100-200 A/cm2). A delay in the registration of protons by 40-50 ns (on the drift path 14-16 cm) was found in the absence of a delay in the registration of heavy ions. It has been shown that this delay can be related to the deceleration of light ions during the transport from the diode to a collimated Faraday cup. This effect of spatial compression of the ion beam in the direction of the drift increases its pulse power but complicates the time-of-flight diagnostics of its composition.

Original languageEnglish
Article number103303
JournalReview of Scientific Instruments
Volume90
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

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Electric space charge
Ion beams
space charge
Diodes
ion beams
diodes
insulation
Insulation
Chemical analysis
light ions
Deceleration
Ions
deceleration
Heavy ions
ion currents
heavy ions
Protons
pulse duration
Current density
current density

ASJC Scopus subject areas

  • Instrumentation

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Influence of the space charge of an ion beam on the time-of-flight diagnostics of its composition. / Pushkarev, A.; Zhu, X. P.; Zhang, C. C.; Prima, A.; Li, Y.; Egorova, Yu; Lei, M. K.

In: Review of Scientific Instruments, Vol. 90, No. 10, 103303, 01.10.2019.

Research output: Contribution to journalArticle

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