Gemini Observatory commissioned a SDSU (ARC) detector controller (DC) replacement for the aging GNAAC DC for the Gemini Near Infrared Spectrograph (GNIRS). The focus of this paper is on the iterative development approach that led to a unique Python-based DC. We leveraged the stability and modern technology of the Gemini Data System (GDS) and Gemini Instrument API (GIAPI) to facilitate communication between the DC and the Gemini telescope systems. Another core innovation was to implement a Python version of the Gemini specific CAD/CAR EPICS records which allowed us to switch from an EPICS Input Output Controller (IOC) to a Caproto Python IOC. These innovations allow the Python based DC to communicate with all of the many Gemini systems required to process GNIRS observations. The use of a Python based DC enhances the system's functionality but also simplifies future updates and maintenance. Our paper delves into the team-centric iterative development process, the software engineering challenges, and the initial operational performance, emphasizing the software's role in modernizing the observatory's infrastructure.
We present a status update on SCORPIO, the next facility instrument for the Gemini South telescope at Cerro Pachon, Chile. SCORPIO is now in advanced Assembly, Integration and Verification phase at SWRI (San Antonio) and LICA (Madrid) in anticipation of shipment to Chile by Fall-2025.
IGRINS-2 is a high-resolution, near-infrared spectrograph developed by Korea Astronomy and Space Science Institute (KASI) for Gemini Observatory as a new facility instrument. It provides spectral resolving power of ~45,000 and a simultaneous wavelength coverage of 1.49-2.46 μm. IGRINS-2 is an improved version of IGRINS (Immersion GRating INfrared Spectrometer) with minor optical and mechanical design changes, new detector controllers, and operating software to be fully integrated into Gemini operating systems. Since the project began in early 2020, project key milestones including assembly and pre-delivery performance verification were completed, and delivered to Gemini North in early September, 2023. After the successful post-delivery verification and telescope integration, the first light spectra were acquired in October 2023. We present design changes and upgrades made to IGRINS-2 from the original IGRINS, assembly and alignment procedures, and verification of the instrument requirements. We also report the preliminary results of the system performance tests.
We are developing, the second generation of Immersion GRating INfrared Spectrometer, IGRINS-2 which will be a dedicated facility instrument of the Gemini Observatory. IGRINS has been in active operation for more than 8 years since 2014, including recent visits to the Gemini South telescope. House Keeping Package (HKP) of the IGRINS-2 control software monitors temperature, vacuum pressure, and Power Distribution Unit (PDU) of the hardware components, and controls PDU and calibration unit (the motors and the lamps). Slit Camera Package (SCP) and Data Taking Package (DTP) operate the infrared array detectors of Detector Control System (DCS). The interface board for each H2RG detector in IGRINS-2 has been changed from JADE2 to MACIE, which leads us to develop our own control software using the MACIE library in DCS. The IGRINS-2 software will communicate with Gemini Master Process (GMP) through Gemini Instrument Application Programmer Interface (GIAPI). This work presents the design and development process of the IGRINS-2 control software.
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