Mr. Aubrey Kovacevich Profile

Aubrey Kovacevich

at Winona State Univ

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Proceedings Article | 31 August 2022 Poster + Paper

Design and initial performance of the HARDWARE.astronomy Housekeeping (H.aHk) box

Stephen Shaw, Larry Vettleson-Trutza, Carl Ferkinhoff, Adam Stammer, Nathan Antwi, Aubrey Kovacevich, Alex Franta, Gordon Stacey, Thomas Nikola, Christopher Rooney, Amit Vishwas, Stephen Parshley, Sarah Higdon, James Higdon

Proceedings Volume 12190, 1219011 (2022) https://doi.org/10.1117/12.2630261

KEYWORDS: Temperature metrology, Sensors, Control systems, Power supplies, Human-machine interfaces

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An often unglamorous, yet critical, part of most millimeter/submillimeter astronomical instruments is cryogenic temperature monitoring and control. Depending on the operating wavelength of the instrument and detector technology, this could be stable temperatures in the Kelvin range for millimeter heterodyne systems to 100 mK temperatures at sub-micro-Kelvin stability as for many submillimeter bolometer systems. Here we describe a project of the HARDWARE.astronomy initiative to build a low-cost open-source temperature monitoring and control system. The HARDWARE.astronomy Housekeeping Box, or H.aHk Box (pronounced “hack box”) is developed primarily by undergraduates and employs existing open-source devices (e.g Arduino, Raspberry Pi) to reduce costs while also limiting the complexity of the development. The H.aHk Box features a chassis with a control computer and ten expansion slots that can be filled with a variety of expansion cards. These cards include initially an AC 4-wire temperature monitor and PID control cards. Future work will develop 2-wire temperature monitors, stepper motor controller, and high-power supply. The base-system will also be able to interface with other house-keeping systems over USB, serial port and ethernet. The first deployment of the H.aHk Box will be for the ZEUS-2 submillimeter grating spectrometer. All designs, firmware, software and parts list will be published online allowing for other projects to adopt the system and create custom expansion cards as needed. Here we describe the design (including mechanical, electrical, firmware, and software components) and initial performance of the H.aHk Box system with initial AC/DC 4-wire and PID cards.

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