Hector spectrograph (spector): mechanical engineering overview

Mahesh Mohanan; Julia Bryant; Rebecca Brown; Scott Croom; Robert Content; Tony Farrell; Michael Goodwin; Jonathan Bland-Hawthorn; Ellen Houston; Urs Klauser; Jon Lawrence; Helen McGregor; Naveen Pai; David Robertson; Will Saunders; Lew Waller; Ross Zhelem; Jessica Zheng

doi:10.1117/12.2630617

29 August 2022 Hector spectrograph (spector): mechanical engineering overview

Mahesh Mohanan, Julia Bryant, Rebecca Brown, Scott Croom, Robert Content, Tony Farrell, Michael Goodwin, Jonathan Bland-Hawthorn, Ellen Houston, Urs Klauser, Jon Lawrence, Helen McGregor, Naveen Pai, David Robertson, Will Saunders, Lew Waller, Ross Zhelem, Jessica Zheng

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121847P (2022) https://doi.org/10.1117/12.2630617
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Hector is a multi-integral-field-unit instrument for the Anglo-Australian Telescope (AAT). It simultaneously feeds two spectrographs, the existing AAOmega spectrograph and the new higher-resolution Spector spectrograph. Both are fed with new generation hexabundles. Spector has an all refractive 2- arm design which delivers 1.3A fixed resolution across the full wavelength range has higher resolution in the blue end and R=5000 in the red which makes Spector uniquely powerful spectrograph. The mechanical assembly of the spectrograph is designed to provide specific solutions to the tight spacing between component assemblies with strict tolerance constraints which makes Spector an interesting challenging instrument. The components start with a custom slit assembly providing precise positioning of 855 fibres which forms the interface point for light injection to the spectrograph. This paper presents a detail overview of opto-mechanical component design of Spector spectrograph along with technical specifications. Component fabrication, assembly, testing alignment was completed by early 2021 and received first light in December 2021.

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Mahesh Mohanan, Julia Bryant, Rebecca Brown, Scott Croom, Robert Content, Tony Farrell, Michael Goodwin, Jonathan Bland-Hawthorn, Ellen Houston, Urs Klauser, Jon Lawrence, Helen McGregor, Naveen Pai, David Robertson, Will Saunders, Lew Waller, Ross Zhelem, and Jessica Zheng "Hector spectrograph (spector): mechanical engineering overview", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121847P (29 August 2022); https://doi.org/10.1117/12.2630617

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