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Zuo C, Xue F, Li J, Li D, Chen D. Development of the caesium oven for HUST negative ion source. FUSION ENGINEERING AND DESIGN 2022. [DOI: 10.1016/j.fusengdes.2022.113334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hahn R, Battard T, Boucher O, Picard YJ, Lignier H, Comparat D, Keriel NA, Lopez C, Oswald E, Reveillard M, Viteau M. Comparative analysis of recirculating and collimating cesium ovens. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:043302. [PMID: 35489895 DOI: 10.1063/5.0085838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
We have performed a study of several cesium oven designs. A comparison between recirculating (or sticking-wall) and collimating (or re-emitting-wall) ovens is made in order to extract the most efficient design in terms of beam brightness. Unfortunately, non-reproducible behaviors have been observed, and the most often observed output flux is similar to the sticking-wall case, which is the lowest theoretical value of the two cases, with a beam brightness close to 1018 at. sr-1 s-1 cm-2. The reason of this universally observed behavior is unclear despite having tested several materials for the collimating tube. Conclusion on possible improved design based on sticking of cesium on several (un)cleaned surfaces is given.
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Affiliation(s)
- Raphaël Hahn
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Thomas Battard
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Oscar Boucher
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Yan J Picard
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Hans Lignier
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | - Daniel Comparat
- Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405 Orsay, France
| | | | - Colin Lopez
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, LuMIn, 91190 Gif-sur-Yvette, France
| | | | - Morgan Reveillard
- Orsay Physics, ZAC ST Charles, 3ème Avenue, No. 95, 13710 Fuveau, France
| | - Matthieu Viteau
- Orsay Physics, ZAC ST Charles, 3ème Avenue, No. 95, 13710 Fuveau, France
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Pandya K, Bansal G, Gahlaut A, Soni J, Yadav RK, Mahesh V, Tyagi H, Parmar K, Mistri H, Bhagora J, Prajapati B, Patel K, Bhuyan M, Gouswami M, Bandyopadhyay M, Chakraborty AK. System upgradation for surface mode negative ion beam extraction experiments in ROBIN. FUSION ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.fusengdes.2016.11.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fantz U, Friedl R, Fröschle M. Controllable evaporation of cesium from a dispenser oven. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:123305. [PMID: 23277980 DOI: 10.1063/1.4771967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This instrument allows controlled evaporation of the alkali metal cesium over a wide range of evaporation rates. The oven has three unique features. The first is an alkali metal reservoir that uses a dispenser as a cesium source. The heating current of the dispenser controls the evaporation rate allowing generation of an adjustable and stable flow of pure cesium. The second is a blocking valve, which is fully metallic as is the body of the oven. This construction both reduces contamination of the dispenser and enables the oven to be operated up to 300 °C, with only small temperature variations (<5 °C). By minimizing the temperature variation, the built up of the alkali metal at a cold spot is significantly hindered. The last feature is an integral surface ionization detector for measuring and controlling the evaporation rate. The dispenser oven can be easily transferred to the other alkali-metals.
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Affiliation(s)
- U Fantz
- Max-Planck-Institut für Plasmaphysik, EURATOM Association, Boltzmannstr. 2, 85748 Garching, Germany.
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