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Superconducting Magnetic Hall Effect Ion Source

IP.com Disclosure Number: IPCOM000109367D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Cuomo, JJ: AUTHOR [+2]

Abstract

The Hall-Effect or End-Hall ion source is a type of ion source which produces a charge-neutralized beam of ions at energies of from 20 to 150 eV (*). This ion source utilizes the trapping of electrons in perpendicular electric and magnetic fields near the anode of the source to provide high plasma density and subsequently a high ion current. Ions drift from the source due to the gradient in the magnetic field set up by a large magnet placed behind the anode structure. This magnet is also used to help with the confinement of electrons near the anode. Generally, the magnet used is a simple electromagnet or a permanent magnet. The characteristics of the ion beam produced are strongly related to the strength and shape of the magnetic field.

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Superconducting Magnetic Hall Effect Ion Source

       The Hall-Effect or End-Hall ion source is a type of ion
source which produces a charge-neutralized beam of ions at energies
of from 20 to 150 eV (*).  This ion source utilizes the trapping of
electrons in perpendicular electric and magnetic fields near the
anode of the source to provide high plasma density and subsequently a
high ion current.  Ions drift from the source due to the gradient in
the magnetic field set up by a large magnet placed behind the anode
structure.  This magnet is also used to help with the confinement of
electrons near the anode.  Generally, the magnet used is a simple
electromagnet or a permanent magnet.  The characteristics of the ion
beam produced are strongly related to the strength and shape of the
magnetic field.  This source can be limited at either large sizes or
large ion currents by the complexity of creating a large area
magnetic field.

      The invention consists of replacing the existing magnet
structure with an electromagnet constructed from the high temperature
superconducting compounds of either Yittrium Barium Copper Oxide, or
else related materials (see the figure).  These materials can be
superconducting at liquid nitrogen temperatures (77~K).  The use of a
superconducting magnet has several advantages.  First, it reduces the
complexity and size of the existing magnet structure, resulting in
reduced power supplies and cooling requirements.  Second, it allows...