Comparison Of Electromagnetic, Electrostatic And Permanent Magnet Quadrupole Lens Probe-Forming Systems For High Energy Ions

Journal Article · Wed Jun 01 04:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3586097· OSTI ID:21513363

Dymnikov, Alexander D; Glass, Gary A ^[1]

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1. Louisiana Accelerator Center/Physics Dept/, Louisiana University at Lafayette, 320 Cajundome Blvd., Lafayette Louisiana 70506 (United States)

The focusing system is an essential part of any ion microbeam system and focusing of MeV ion beams is generally accomplished using quadrupole lenses. There are two types of quadrupole lenses requiring the application of either voltage or current to provide the excitation, but there is also the possibility of utilizing lenses constructed from permanent magnets. All of these lens types have different advantages and disadvantages. Most microprobes employ electromagnetic quadrupoles for focusing, however electrostatic lenses have several advantages with respect to electromagnetic lenses, including significantly smaller size, no hysteresis effects, no heating, the utilization of highly stable voltage supplies, focusing which is independent of ion mass, and construction from industrial grade materials. The main advantage of the permanent magnetic lens is that it does not require the application of external power which can significantly reduce the overall lifetime cost. In this presentation, the short probe-forming systems comprised from all these types of quadrupole lenses are compared and the smallest beam spot size and appropriate optimal parameters of these probe-forming systems are determined.

• OSTI ID: 21513363
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1336; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAMS
COMPARATIVE EVALUATIONS
ELECTRIC POTENTIAL
ELECTROMAGNETIC LENSES
ELECTROSTATIC LENSES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EVALUATION
EXCITATION
FOCUSING
HEATING
HYSTERESIS
ION BEAMS
LENSES
LIFETIME
MAGNETIC FIELDS
MAGNETS
MASS
MEV RANGE
MULTIPOLES
PERMANENT MAGNETS
QUADRUPOLES