| Title |
Angular Distribution Measurement of Atoms Evaporated from a Resistive Oven Applied to Ion Beam Production |
| Authors |
- T. Thuillier, A. Leduc
LPSC, Grenoble Cedex, France
- O. Bajeat, A. Leduc, L. Maunoury
GANIL, Caen, France
|
| Abstract |
A low temperature oven has been developed to produce calcium beam with Electron Cyclotron Resonance Ion Source. The atom flux from the oven has been studied experimentally as a function of the temperature and the angle of emission by means of a quartz microbalance. The absolute flux measurement permitted to derive Antoine’s coefficient for the calcium sample used : A=8.98± 0.07 and B=7787± 110 in standard unit. The angular FWHM of the atom flux distribution is found to be 53.7±7.3 °at 848K. The atom flux hysteresis observed experimentally in several laboratories is explained as follows: at first calcium heating, the evaporation comes from the sample only resulting in a small evaporation rate. once a full calcium layer has formed on the crucible refractory wall, the caclcium evaporation surface includes the crucible’s enhancing dramatically the evaporation rate for a givent temperature. A Monte-Carlo code, developed to reproduce and investigate the oven behaviour as a function of temperature is presented. A discussion on the gas regime in the oven is proposed as a function of its temperature. A fair agreement between experiment and simulation is found.
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| Paper |
download TUXZO03.PDF [0.830 MB / 6 pages] |
| Slides |
download TUXZO03_TALK.PDF [4.542 MB] |
| Cite |
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| Conference |
ECRIS2020 |
| Series |
International Workshop on ECR Ion Sources (24th) |
| Location |
East Lansing, MI, USA |
| Date |
28-30 September 2020 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Guillaume Machicoane (FRIB-MSU, East Lansing, MI, USA); Alexa Allen (FRIB, East Lansing, MI, USA); Ana Lesage (FRIB, East Lansing, MI, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-226-4 |
| Online ISSN |
2222-5692 |
| Received |
28 September 2020 |
| Revised |
19 February 2021 |
| Accepted |
21 July 2021 |
| Issue Date |
16 April 2022 |
| DOI |
doi:10.18429/JACoW-ECRIS2020-TUXZO03 |
| Pages |
72-77 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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