Comparison of experimental and Monte-Carlo simulation of MeV particle transport through tapered/straight glass capillaries and circular collimators

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 362; pp. 72 - 79
• Main Authors: Hespeels, F., Tonneau, R., Ikeda, T., Lucas, S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2015
• Subjects: Beams (radiation); Capillaries; Collimators; Devices; Focusing effect; Glass; Glass capillary; Ion beam analysis; Micro beam; Monte Carlo methods; Particle beams; Simulation; Collimators; Glass capillary; Micro beam; Focusing effect; Ion beam analysis
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2015.09.030

•Monte-Carlo simulation for beam transportation through collimations devices.•We confirm the focusing effect of tapered glass capillary.•We confirm the feasibility of using passive collimation devices for ion beam analysis application.
This study compares the capabilities of three different passive collimation devices to produce micrometer-sized beams for proton and alpha particle beams (1.7MeV and 5.3MeV respectively): classical platinum TEM-like collimators, straight glass capillaries and tapered glass capillaries. In addition, we developed a Monte-Carlo code, based on the Rutherford scattering theory, which simulates particle transportation through collimating devices. The simulation results match the experimental observations of beam transportation through collimators both in air and vacuum. This research shows the focusing effects of tapered capillaries which clearly enable higher transmission flux. Nevertheless, the capillaries alignment with an incident beam is a prerequisite but is tedious, which makes the TEM collimator the easiest way to produce a 50μm microbeam.