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

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 cu...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2019-10, Vol.90 (10)
Main Authors: Pushkarev, A., Zhu, X. P., Zhang, C. C., Prima, A., Li, Y., Egorova, Yu, Lei, M. K.
Format: Article
Language:English
Subjects:
Collimation
Composition
Deceleration
Delay
Drift
Heavy ions
Insulation
Ion beams
Ion current density
Ion currents
Light ions
Pulse duration
Scientific apparatus & instruments
Space charge
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5116598