Ion microprobe improvements in Tandetron Laboratory NPI CAS: Numerical calculation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00509714" target="_blank" >RIV/61389005:_____/19:00509714 - isvavai.cz</a>

Alternative codes found

RIV/44555601:13440/19:43894754

Result on the web

<a href="https://doi.org/10.1016/j.nimb.2019.08.007" target="_blank" >https://doi.org/10.1016/j.nimb.2019.08.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nimb.2019.08.007" target="_blank" >10.1016/j.nimb.2019.08.007</a>

Result language

angličtina

Original language name

Ion microprobe improvements in Tandetron Laboratory NPI CAS: Numerical calculation

Original language description

Ion scanning microprobe was implemented in the Tandetron Laboratory, Nuclear Physics Institute of the Czech Academy of Sciences (NPI CAS) in Rez in 2009. Rez microprobe is coupled with a tandetron accelerator, which provides ions from hydrogen to gold, and able to focus heavy ions with the maximum mass energy product at the level 11 MeV amu/q(2). Therefore, microprobe can be used for polymers irradiation by protons and helium as well as for irradiation of various types of glass and other materials with heavy ions. The number of applications for the microprobe in the Tandetron Laboratory is constantly increasing, that leads to the necessity to raise the efficiency of the microprobe operation. Increasing the beam current density allows for a reduction in the time per experiment in relation to recording the number of events. The present work is an attempt to improve the parameters of existing ion scanning microprobe based on a compact Oxford triplet lens system. Since the microprobe is used to investigate both thin and thick targets, the position of the detectors that can restrict the microprobe construction were taken into account in the calculation. The collimated acceptance of the probe-forming system was selected as an objective function as it takes into account both chromatic and all spherical aberrations. Two methods for improving the microprobe parameters were considered. The first one is based on separation of the first lens in the system, whilst the second - on decreasing the working distance. Both ways need changing in the microprobe construction, but the last one requires a major alteration in a target chamber. The benefits of each way were studied. Obtained parameters of the new probe-forming system have shown a two fold increase of the current density of the given probe size for Rez microprobe in comparison with the present system. The benefits of the displacement of the first lens disappear with the decreasing of the working distance.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nuclear Instruments & Methods in Physics Research Section B

ISSN

0168-583X

e-ISSN

—

Volume of the periodical

458

Issue of the periodical within the volume

11

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

5

Pages from-to

77-81

UT code for WoS article

000486134400012

EID of the result in the Scopus database

2-s2.0-85070547161