Prime Focus Spectrograph (PFS): the prime focus instrument

Shiang-Yu Wang; Pin-Jie Huang; Hsin-Yo Chen; Masahiko Kimura; Chih-Yi Wen; Chi-Hung Yan; Jennifer Karr; Richard C. Y. Chou; Yin-Chang Chang; Shu-Fu Hsu; Yen-Shan Hu; Hung-Hsu Ling; Dan J. Reiley; Mitsuko Roberts; James E. Gunn; Craig Loomis; Robert H. Lupton; Hassan Siddiqui; Graham J. Murray; Decio Ferreira; Leandro Henrique dos Santos; Ligia Souza Oliveira; Antonio Cesar de Oliveira; Lucas Souza Marrara; Naoyuki Tamura; Yuki Moritani; Naruhisa Takato

doi:10.1117/12.2561194

13 December 2020 Prime Focus Spectrograph (PFS): the prime focus instrument

Shiang-Yu Wang, Pin-Jie Huang, Hsin-Yo Chen, Masahiko Kimura, Chih-Yi Wen, Chi-Hung Yan, Jennifer Karr, Richard C. Y. Chou, Yin-Chang Chang, Shu-Fu Hsu, Yen-Shan Hu, Hung-Hsu Ling, Dan J. Reiley, Mitsuko Roberts, James E. Gunn, Craig Loomis, Robert H. Lupton, Hassan Siddiqui, Graham J. Murray, Decio Ferreira, Leandro Henrique dos Santos, Ligia Souza Oliveira, Antonio Cesar de Oliveira, Lucas Souza Marrara, Naoyuki Tamura, Yuki Moritani, Naruhisa Takato

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114477V (2020) https://doi.org/10.1117/12.2561194
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degrees diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument (PFI) provides the interface with the top structure of Subaru telescope and also accommodates the optical bench in which Cobra fiber positioners and fiducial fibers are located. In addition, the acquisition and guiding cameras (AGCs), the cable wrapper, the fiducial fiber illuminator, and viewer, the field element, and the telemetry system are located inside the PFI. The mechanical structure of the PFI was designed with special care such that its deflections sufficiently match those of the HSC’s Wide Field Corrector (WFC) so the fibers will stay on targets over the course of the observations within the required accuracy. The delivery of PFI components started in 2017. After the verification of these components, the mechanical structure of the PFI is fully assembled in early 2019 and all Cobra positioners are integrated in summer 2020. A temperature controlled chamber with precise x-y scanner was setup for the verification of the fiber positioners. The testing of the target convergence performance of Cobra positioners is now in progress.

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Shiang-Yu Wang, Pin-Jie Huang, Hsin-Yo Chen, Masahiko Kimura, Chih-Yi Wen, Chi-Hung Yan, Jennifer Karr, Richard C. Y. Chou, Yin-Chang Chang, Shu-Fu Hsu, Yen-Shan Hu, Hung-Hsu Ling, Dan J. Reiley, Mitsuko Roberts, James E. Gunn, Craig Loomis, Robert H. Lupton, Hassan Siddiqui, Graham J. Murray, Decio Ferreira, Leandro Henrique dos Santos, Ligia Souza Oliveira, Antonio Cesar de Oliveira, Lucas Souza Marrara, Naoyuki Tamura, Yuki Moritani, and Naruhisa Takato "Prime Focus Spectrograph (PFS): the prime focus instrument", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114477V (13 December 2020); https://doi.org/10.1117/12.2561194

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