FIREBAll-2 thermal control system: Performance of the 2018 flight and improvements for 2021

Zeren Lin; Gillian Kyne; Bruno Milliard; Hung Pham; Keri Hoadley; Chris Martin; David Schiminovich; Erika T. Hamden; Shouleh Nikzad; Vincent Picouet

doi:10.1117/12.2561974

13 December 2020 FIREBAll-2 thermal control system: Performance of the 2018 flight and improvements for 2021

Zeren Lin, Gillian Kyne, Bruno Milliard, Hung Pham, Keri Hoadley, Chris Martin, David Schiminovich, Erika T. Hamden, Shouleh Nikzad, Vincent Picouet

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Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 1144529 (2020) https://doi.org/10.1117/12.2561974
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The Faint Intergalactic Medium Redshifted Emission Balloon (FIREBall-2) is a UV multi-object spectrograph exploring the CGM of galaxies at low redshifts (0.3 < z < 1.0). The science detector is a EMCCD cooled by a Sunpower cryocooler to minimize the noise contributions from dark current. To efficiently remove the heat generated by the cryocooler and other critical hardware, we built a custom water cooling circuit which uses a water/alcohol/ice mixture to regulate temperatures during flight. We report the ground and flight performances of the thermal system during the 2018 campaign and the lessons learned since then. We will discuss the model predictions of the potential impacts of several major upgrades as well as modifications to adapt to those impacts, and the ground performance of the thermal system during the rebuild of FIREBall-2, compared with the model predictions, for the next launch of FIREBall-2 in Fort Sumner in 2020.

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Zeren Lin, Gillian Kyne, Bruno Milliard, Hung Pham, Keri Hoadley, Chris Martin, David Schiminovich, Erika T. Hamden, Shouleh Nikzad, and Vincent Picouet "FIREBAll-2 thermal control system: Performance of the 2018 flight and improvements for 2021", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 1144529 (13 December 2020); https://doi.org/10.1117/12.2561974

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KEYWORDS

Control systems

Cryocoolers

Performance modeling

Sensors

Thermal modeling

Astronomical imaging

Electron multiplying charge coupled devices

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