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The cooling capabilities of C$_2$F$_6$/C$_3$F$_8$ saturated fluorocarbon blends for the ATLAS silicon tracker / Bates, R (Glasgow U.) ; Battistin, M (CERN) ; Berry, S (CERN) ; Bitadze, A (Glasgow U.) ; Bonneau, P (CERN) ; Bousson, N (Marseille, CPPM) ; Boyd, G (Oklahoma U.) ; Botelho-Direito, J (CERN) ; Crespo-Lopez, O (CERN) ; DiGirolamo, B (CERN) et al.
We investigate and address the performance limitations of the ATLAS silicon tracker fluorocarbon evaporative cooling system operation in the cooling circuits of the barrel silicon microstrip (SCT) sub-detector. In these circuits the minimum achievable evaporation temperatures with C(3)F(8) were higher than the original specification, and were thought to allow an insufficient safety margin against thermal runaway in detector modules subject to a radiation dose initially foreseen for 10 years operation at LHC. [...]
2015 - 33 p. - Published in : JINST 10 (2015) P03027 IOP Open Access article: PDF;

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The Thermosiphon Cooling System of the ATLAS Experiment at the CERN Large Hadron Collider / Battistin, M (CERN) ; Berry, S (CERN) ; Bitadze, A (Glasgow U.) ; Bonneau, P (CERN) ; Botelho-Direito, J (CERN) ; Boyd, G (Oklahoma U.) ; Corbaz, F (CERN) ; Crespo-Lopez, O (CERN) ; Da Riva, E (CERN) ; Degeorge, C (Indiana U.) et al.
The silicon tracker of the ATLAS experiment at CERN Large Hadron Collider will operate around –15°C to minimize the effects of radiation damage. The present cooling system is based on a conventional evaporative circuit, removing around 60 kW of heat dissipated by the silicon sensors and their local electronics. [...]
2015 - Published in : Int. J. Chem. React. Eng. 13 (2015) 511-521 De Gruyter Open Access article: PDF;

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A Custom Online Ultrasonic Gas Mixture Analyzer With Simultaneous Flowmetry, Developed for the Upgraded Evaporative Cooling System of the ATLAS Silicon Tracker / Bates, R (Glasgow U.) ; Battistin, M ; Berry, S ; Berthoud, J ; Bitadze, A ; Bonneau, P ; Botelho-Direito, J ; Bousson, N ; Boyd, G ; Bozza, G et al.
We describe a combined ultrasonic instrument for continuous gas flow measurement and simultaneous real-time binary gas mixture analysis. In the instrument, sound bursts are transmitted in opposite directions, which may be aligned with the gas flow path or at an angle to it, the latter configuration being the best adapted to high flow rates. [...]
2014 - 7 p. - Published in : IEEE Trans. Nucl. Sci. 61 (2014) 2059-2065
In : Advancements in Nuclear Instrumentation Measurement Methods and Applications, Marseille, France, 23 - 27 Jun 2013, pp.2059-2065

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Simultaneous On-line Ultrasonic Flowmetery and Binary Gas Mixture Analysis for the ATLAS Silicon Tracker Cooling Control System / Doubek, M (Prague, Tech. U., Mech.) ; Vacek, V (Prague, Tech. U., Mech.) ; Vitek, M (Prague, Tech. U., Mech.) ; Bates, R L (Glasgow U.) ; Bitadze, A (Glasgow U.) ; Battistin, M (CERN) ; Berry, S (CERN) ; Berthoud, J (CERN) ; Bonneau, P (CERN) ; Botelho-Direito, J (CERN) et al.
SIMULTANEOUS ON-LINE ULTRASONIC FLOWMETERY AND BINARY GAS MIXTURE ANALYSIS FOR THE ATLAS SILICON TRACKER COOLING CONTROL SYSTEM.
2014 External link: Published version from JaCoW
In : 14th International Conference on Accelerator & Large Experimental Physics Control Systems, San Francisco, CA, USA, 6 - 11 Oct 2013, pp.tuppc038

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Development of a custom on-line ultrasonic vapour analyzer/flowmeter for the ATLAS inner detector, with application to gaseous tracking and Cherenkov detectors / Bates, R. (Glasgow U.) ; Battistin, M. (CERN) ; Berry, S. (CERN) ; Berthoud, J. (CERN) ; Bitadze, A. (Glasgow U.) ; Bonneau, P. (CERN) ; Botelho-Direito, J. (CERN) ; Bousson, N. (Marseille, CPPM) ; Boyd, G. (Oklahoma U.) ; Bozza, G. (CERN) et al.
Precision sound velocity measurements can simultaneously determine binary gas composition and flow. We have developed an analyzer with custom electronics, currently in use in the ATLAS inner detector, with numerous potential applications. [...]
arXiv:1210.8045.- 2013 - 8 p. - Published in : JINST 8 (2013) C01002 IOP Open Access article: PDF; External link: Preprint
In : Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012, pp.C01002

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A combined ultrasonic flow meter and binary vapour mixture analyzer for the ATLAS silicon tracker / Bates, R. (Glasgow U.) ; Battistin, M. (CERN) ; Berry, S. (CERN) ; Berthoud, J. (CERN) ; Bitadze, A. (Glasgow U.) ; Bonneau, P. (CERN) ; Botelho-Direito, J. (CERN) ; Bousson, N. (Marseille, CPPM) ; Boyd, G. (Oklahoma U.) ; Bozza, G. (CERN) et al.
An upgrade to the ATLAS silicon tracker cooling control system may require a change from C3F8 (octafluoro-propane) evaporative coolant to a blend containing 10-25% of C2F6 (hexafluoro-ethane). Such a change will reduce the evaporation temperature to assure thermal stability following radiation damage accumulated at full LHC luminosity. [...]
arXiv:1210.4835.- 2013 - 30 p. - Published in : JINST 8 (2013) P02006 Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint

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Prototype ATLAS IBL Modules using the FE-I4A Front-End Readout Chip / ATLAS IBL Collaboration
The ATLAS Collaboration will upgrade its semiconductor pixel tracking detector with a new Insertable B-layer (IBL) between the existing pixel detector and the vacuum pipe of the Large Hadron Collider. The extreme operating conditions at this location have necessitated the development of new radiation hard pixel sensor technologies and a new front-end readout chip, called the FE-I4. [...]
arXiv:1209.1906; AIDA-PUB-2012-010.- 2012 - 45 p. - Published in : JINST 7 (2012) P11010 Fulltext: PDF; External link: Preprint

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A Combined On-Line Acoustic Flowmeter and Fluorocarbon Coolant Mixture Analyzer for The ATLAS Silicon Tracker / Bitadze, A. (Glasgow U.) ; Bates, R. (Glasgow U.) ; Battistin, M. (CERN) ; Berry, S. (CERN) ; Bonneau, P. (CERN) ; Botelho-Direito, J. (CERN) ; DiGirolamo, B. (CERN) ; Godlewski, J. (CERN) ; Perez-Rodriguez, E. (CERN) ; Zwalinski, L. (CERN) et al.
An upgrade to the ATLAS silicon tracker cooling control system may require a change from C3F8 (octafluoro-propane) to a blend containing 10-30% of C2F6 (hexafluoro-ethane) to reduce the evaporation temperature and better protect the silicon from cumulative radiation damage with increasing LHC luminosity. Central to this upgrade is a new acoustic instrument for the real-time measurement of the C3F8/C2F6 mixture ratio and flow. [...]
arXiv:1201.2640.- 2011 - 6 p. - Published in : Conf. Proc.: C111010 (2011) , pp. WEPMN038 Fulltext: PDF; External links: Preprint; Published version from JaCoW
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.969-972

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