Bench and thermal vacuum testing of the JUICE-UVS microchannel plate detector system

Michael W. Davis; Oswald H. W. Siegmund; G. Randall Gladstone; Adrian Martin; Philippa M. Molyneux; Kurt D. Retherford; Todd J. Veach; John V. Vallerga

doi:10.1117/12.2529649

9 September 2019 Bench and thermal vacuum testing of the JUICE-UVS microchannel plate detector system

Michael W. Davis, Oswald H. W. Siegmund, G. Randall Gladstone, Adrian Martin, Philippa M. Molyneux, Kurt D. Retherford, Todd J. Veach, John V. Vallerga

Author Affiliations +

Proceedings Volume 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI; 111180Q (2019) https://doi.org/10.1117/12.2529649
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

The JUICE (JUpiter ICy moons Explorer) Ultraviolet Spectrograph (JUICE-UVS) is the fifth in the line of Alice/UVS spectrographs from Southwest Research Institute (SwRI). The heart of the instrument is a far-UV sensitive microchannel plate detector system. This detector includes an atomic-layer deposition (ALD) coating on the bottom plate to minimize gain sag, resulting in a detector with orders of magnitude longer lifetime given comparable fluences than previously flown MCP detectors. This detector is also the first instance of a curved microchannel plate z-stack receiving an ALD coating to minimize gain sag. The detector electronics have also been improved over previous generations to preserve pulse height integrity at the high (i.e. 100 kHz) count rates expected during operation in the Jupiter system. The flight model detector was bench tested at Sensor Sciences and delivered to the JUICE-UVS project in August 2018. Further bench tests were undertaken at SwRI after delivery, followed by thermal vacuum testing in October 2018. The results of these tests are presented herein.

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Michael W. Davis, Oswald H. W. Siegmund, G. Randall Gladstone, Adrian Martin, Philippa M. Molyneux, Kurt D. Retherford, Todd J. Veach, and John V. Vallerga "Bench and thermal vacuum testing of the JUICE-UVS microchannel plate detector system", Proc. SPIE 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI, 111180Q (9 September 2019); https://doi.org/10.1117/12.2529649

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KEYWORDS

Sensors

Microchannel plates

Electronics

Atomic layer deposition

Coating

Spectrographs

Quantum efficiency

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