A Simple Image Intensifier Prepared for the Transport of Nano-Ampere keV Ion Beams

Abstract

We introduce our handmade image intensiˆer for visualizing the beam proˆles of accelerated ion beams having energy and current in the order of keV and nano-amperes, respectively. The simple image intensiˆer comprising stainless steel meshes and a ‰uorescent screen has been designed for the transport of mm-size ion beams. The intensiˆer is easy to install in the beamline of a vacuum setup, because it is designed to attach on a con‰at ‰ange of ICF70. We have used the image intensiˆer to observe the beam proˆles of the ion beams transported from the ion source to an ultra-high vacuum chamber. Through the use of the image intensiˆer, bright images were obtained, and it was concluded that the intensiˆer is useful for observing the proˆles of the beams having current densities greater than 0.1 nA mm-2 .

Detection System for KeV Proton Beam Scattered from an ESD-surface with Monolayer Pits of Alkali Halide Crystal

“…The inset shows an illustration of the incident beam spot proˆle before collimation. In the beam spot proˆle of 3×3 mm 2 , dark lines originated from a stainless mesh, used as a secondary electron emitter, are visible 15) . To observe the incident beam spot prole after collimation and scattering of protons from the target surface, the image intensiˆer was replaced by a ‰uorescent screen made on the ITO glass plate, assembled with a micro-channel-plate (MCP) (F2807; Hamamatsu Photonics), shown in Fig.…”

“…1. The main part of the experimental setup was described elsewhere 14,15) ; thus, only a brief outline and the parts modiˆed for this experiment are discussed.…”

“…A Faraday cup and a simple image intensiˆer shown in Fig. 2(a) were equipped downstream of the UHV chamber to transport and collimate a 15 keV proton beam from the RF ion source 15) . The inset shows an illustration of the incident beam spot proˆle before collimation.…”