ISSN 2413-4996 (English ed. Online)
ISSN 2409-9066 (English ed. Print)
ISSN 2409-9066 (English ed. Print)
Title | Thermoelectric Coolers for X-ray Detectors |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Anatychuk, LI, Prybyla, AV |
Short Title | Sci. innov. |
DOI | 10.15407/scine16.04.044 |
Volume | 16 |
Issue | 4 |
Section | Research and Engineering Innovative Projects of the National Academy of Sciences of Ukraine |
Pagination | 44-49 |
Language | English |
Abstract | Introduction. X-ray methods are widely used for the nondestructive microanalytic studies of the structure and composition of materials with a high spatial resolution. Further increase in their resolution depends substantially on improving the analytical characteristics of semiconductor detectors, as well as on the application of novel types of wide-aperture position-sensitive radiation detectors.
Problem Statement. The resolution of X-ray detectors is essentially dependent on their operating temperature mode, provided by the use of thermoelectric coolers. single-stage thermoelectric coolers (TeC) are used for superficial cooling (down to 250K); to cool sensors to an operating temperature of 230K two-stage TeCs are used and three-stage TeCs are used for temperatures down to 210K, whereas four- and five-stage ones are meant for cooling below 190K. Purpose. Design and structural optimization of a thermoelectric multi-stage cooler of X-ray radiation detector. Materials and Methods. Computer-based object-oriented design methods and optimal control theory methods adapted for thermoelectric energy conversion applications. To develop thermoelectric cooling modules, bismuth telluride-based materials (Bi2Te3) of n- and p-types of conductivity have been used. Results. Calculations of the design of the thermoelectric cooler as a part of the X-ray detector showed optimum electric power of the thermoelectric converter W=2.85W, which, with a refrigeration coefficient e=0.02, provides the detector base temperature Tc=-70°C and ∆T=90K. These temperature conditions are optimal for the operation of X-ray detectors and can significantly increase their resolution with minimal electricity consumption. Conclusions. A comprehensive study and optimization has been performed, and the design of a thermoelectric multistage cooler has been calculated, which ensures optimal operating conditions for the X-ray detector. The obtained results can be used to create X-ray detectors with high resolution. |
Keywords | computer simulation, thermoelectric cooling, X-ray detector |
References | 1. Buhay, O. M., Drozdenko, M. O., Storizhko, V. Yu. (2014, August). Microanalytical X-ray facility in IAP NASU. Presented at the conference “Nanotechnology and nanomaterials”. Lviv [in Ukrainian].
2. Woldseth, R. (1973). X-Ray Energy Spectrometry. Kevex: Scotts Valley, CA.
3. Stone, R. E., Barkley, V. A., Fleming, J. A. (1986). Performance of a GammaRay and X-ray Spectrometer using Germanium and Si(Li) Detectors Cooled by a Closed-Cycle Cryogenic Mechanical Refrigerato. IEEE Trans. Nucl. Sci. NS-33(1), 299.
4. Broerman E.C., Keyser R.M., Twomey T.R., Upp D.L. A new cooler for HPGe detector systems. ORTEC, PerkinElmer Instruments, Inc Oak Ridge TN 37831-0895 USA.
URL: https://pdfs.semanticscholar.org/0e62/f420e0ba91f616e92c05b460188be98e8e...
(Last accessed: 19.08.2018). 5. Schlesinger T.E., James R.B. Semiconductors and Semimetals. Vol. 43. Semiconductors for Room Temperature Nuclear Detector Applications. Academic Press: New York, 1995.
URL: https://pdfs.semanticscholar.org/eb10/208f629324cca0a2a3aff16de7b3cc0d44...
(Last accessed: 19.08.2018). 6. Semiconductors for Room-temperature Detectors. Applications II, Materials Research Society Symposium Proceedings, Vol. 487. Materials Research Society: Warrendale, PA, 1998.
URL: https://inis.iaea.org/search/search.aspx?orig_q=RN:30034710
(Last accessed: 19.08.2018). 7. Sokolov, A., Loupilov, A., Gostilo, V. (2004). Semiconductor Peltier-cooled detectors for x-ray fluorescence analysis. X-Ray Spectrometry, 33 (6), 462–465.
8. X-Ray Detectors. http://www.rmtltd.ru/applications/photodetectors/xray.php
(Last accessed: 19.08.2018). 9. X-RAY and Gamma Ray Detector High Resolution CdTe Cadmium Telluride.
http://www.amptek.com/wp-content/uploads/2014/04/XR-100T-CdTe-X-ray-and-...
(Last accessed: 19.08.2018). 10. Anatychuk, L. I., Vihor, L. N. (2013). The limits of thermoelectric cooling for photodetectors. J. of Thermoelectricity, 5, 54–58.
11. COMSOL Multiphysics User’s Guide.
URL: http://people.ee.ethz.ch/~fieldcom/pps-comsol/documents/User%20Guide%20a...
(Last accessed: 19.08.2018). 12. Anatychuk, L. I., Semeniuk, V. A. (1992). Optimal control of the properties of thermoelectric materials and instruments. Chernivtsi: Ruta.
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