Décio Ferreira
A5010605952- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Stellar, planetary, and galactic studies
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Astronomical Observations and Instrumentation
- BIM and Construction Integration
- Semiconductor Lasers and Optical Devices
- Magneto-Optical Properties and Applications
- solar cell performance optimization
- Lung Cancer Diagnosis and Treatment
- Engineering and Test Systems
- Optical Coatings and Gratings
- Particle physics theoretical and experimental studies
- Photocathodes and Microchannel Plates
- 3D Surveying and Cultural Heritage
- Photonic and Optical Devices
- Optical Network Technologies
- Medical Imaging Techniques and Applications
- History and Developments in Astronomy
Kavli Institute for the Physics and Mathematics of the Universe
2018-2022
Laboratório Nacional de Astrofísica
2014-2022
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting prime focus, 2394 reconfigurable fibers will be distributed over 1.3 deg field of view. The spectrograph has been designed with 3 arms blue, red, cameras to simultaneously observe spectra from 380nm 1260nm in one exposure at resolution ~1.6-2.7A. An international collaboration developing this...
The Prime Focus Spectrograph (PFS) is an optical/near-infrared multifiber spectrograph with 2394 science fibers distributed across a 1.3-deg diameter field of view at the Subaru 8.2-m telescope. wide wavelength coverage from 0.38 μm to 1.26 μm, resolving power 3000, simultaneously strengthens its ability target three main survey programs: cosmology, galactic archaeology and galaxy/AGN evolution. A medium resolution mode 5000 for 0.71 0.89 will also be available by simply exchanging...
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting prime focus, 2394 reconfigurable fibers will be distributed over 1.3 deg field of view. The spectrograph has been designed with 3 arms blue, red, cameras to simultaneously observe spectra from 380nm 1260nm in one exposure at resolution ~ 1.6-2.7Å. An international collaboration developing this...
FOCCoS, Fiber Optical Cable and Connector System, has the main function of capturing direct light from focal plane Subaru Telescope using optical fibers, each one with a microlens in its tip, conducting this through route containing connectors to set four spectrographs. The fiber cable is divided 3 different segments called A, B C. Multi-fibers assure precise connection among all fibers segments, providing flexibility for instrument changes. To strong accurate connection, these sets are...
PFS (Prime Focus Spectrograph), a next generation facility instrument on the Subaru telescope, is now being tested telescope. The equipped with very wide (1.3 degrees in diameter) field of view Subaru's prime focus, high multiplexity by 2394 reconfigurable fibers, and waveband spectrograph that covers from 380nm to 1260nm simultaneously one exposure. Currently engineering observations are ongoing Prime Instrument (PFI), Metrology Camera System (MCS), first spectrpgraph module (SM1) visible...
The Prime Focus Spectrograph (PFS) is an optical/near-infrared multi-fiber spectrograph with 2394 science fibers, which are distributed in 1.3 degree diameter field of view at Subaru 8.2-meter telescope. simultaneous wide wavelength coverage from 0.38 um to 1.26 um, the resolving power 3000, strengthens its ability target three main survey programs: cosmology, Galactic archaeology, and galaxy/AGN evolution. A medium resolution mode 5000 for 0.71 0.89 also will be available by simply...
The Fiber Optical Cable and Connector System (FOCCoS), provides optical connection between 2400 positioners a set of spectrographs through fibers cables as part PFS instrument for Subaru telescope. fiber cable will be segmented in 3 parts along the route, A, B C, connected by multi-fiber connectors. company USCONEC produces connector under study. 32F model can connect 32 4 x 8 matrix arrangement. ferrules are made durable composite, Polyphenylene Sulfide (PPS) based thermoplastic....
The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of 8.2m Subaru telescope. PFS will cover 1.3 degrees diameter field with 2394 fibers to complement imaging capability Hyper SuprimeCam (HSC). unit called Instrument (PFI) provides interface top structure telescope and also accommodates optical bench in which Cobra fiber positioners fiducial are located. In addition, acquisition guiding cameras (AGCs), cable wrapper,...
An increasing number of astronomical spectrographs employ optical fibres to collect and deliver light. For integral-field high multiplex multi-object survey instruments, offer unique flexibility in instrument design by enabling be located remotely from the telescope focal plane where fibre inputs are deployed. Photon-starved observations demand optimum efficiency system. In addition intrinsic absorption loss fibres, another mechanism, so-called ratio degradation (FRD) must considered. A...
The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of 8.2m Subaru telescope. PFS will cover 1.3 degree diameter field with 2394 fibers to complement imaging capability Hyper SuprimeCam (HSC). unit called Instrument (PFI) provides interface top structure telescope and also accommodates optical bench in which Cobra fiber positioners are located. In addition, acquisition guiding cameras (AGCs), positioner system, cable wrapper,...
The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of 8.2m Subaru telescope. PFS will cover 1.3 degrees diameter field with 2394 fibers to complement imaging capability Hyper SuprimeCam (HSC). unit called Instrument (PFI) provides interface top structure telescope and also accommodates optical bench in which Cobra fiber positioners fiducial are located. In addition, acquisition guiding cameras (AGCs), cable wrapper,...
The Fiber Optical Cable and Connector System, FOCCoS, subsystem of the Prime Focus Spectrograph, PFS, for Subaru telescope, is responsible to feed four spectrographs with a set optical fibers cables. light injection each spectrograph assured by convex curved slit linear array 616 fibers. In this paper we present design that ensures right direction using masks micro holes. This kind mask made technique called electroforming, which able produce nickel plate holes in sequence. precision error...
The Fiber Optical Cable and Connector System, FOCCoS, for the Prime Focus Spectrograph, PFS, is responsible transporting light from Subaru Telescope focal plane to a set of four spectrographs. Each spectrograph will be fed by convex curved slit with 616 optical fibers organized in linear arrangement. frontal surface covered special dark composite, made refractory oxide, which able sustain its properties minimum quantities abrasives during polishing process; this stability obtained This...
The Prime Focus Spectrograph (PFS) of the Subaru Measurement Images and Redshifts (SuMIRe) project for telescope includes four identical spectrograph modules fed by 600 fibers each. This paper presents integration, alignment test procedures first module composed an optical entrance unit that creates a collimated beam distributes light to three channels, two visible one near infrared. In particular, we present performance single Red channel module. Firstly, report on measured performance:...
FOCCoS, "Fiber Optical Cable and Connector System", is a part of subsystem Prime Focus Spectrograph", for Subaru telescope. FOCCoS are divided in 3 different segments called A, B C. Multi-fibers connectors assure precise connection among all optical fibers the segments, providing flexibility instrument changes. permanently installed at Telescope structure starting Bench device finishing another device. By this way, represent link between light entrance, from C, delivery, to A. This cable...
The Fiber Optic Cable and Connector System, FOCCoS, is a set of optical cables to feed the Prime Focus Spectrograph, PFS, for Subaru telescope [01,02]. extremity responsible delivering light spectrographs called, FCA, A. A cable installed at Spectrograph side consists Slit Assembly, FSA, routing with its support Input FIA. FSA composed fibers arranged linearly on device supported by Frame, protected segmented tubes routed between strain relief boxes connection interface. FIA Bench (Gang...
In this paper, we present the beginning of last phase integration process FOCCoS subsystem, "Fiber Optical Cable and Connector System", to be installed on Subaru telescope as part PFS (Prime Focus Spectrograph) project <sup>[01]</sup>. consists 3 cables (A, B C) integrate operate instruments easily <sup>[02]</sup>. At stage, are about complete by building that intermediates telescope's light gathering output devices for spectrographs. B, which is ~55m long, subdivided into 4 units. Each unit...
In this paper, we present details about the construction of fiber cable Subaru Night-Sky Spectrograph (SuNSS). This instrument addresses two major concerns on PFS project, namely understanding temporal and spatial behavior night sky emission, particularly in red infrared channels, finding a way accurate subtraction for spectrographs. SuNSS is installed spider arm telescope, can deliver lights to spectrograph via called FOCCoS-B (Cable B). means that enables us take spectra as long dome...
PFS (Prime Focus Spectrograph), a next generation facility instrument on the Subaru telescope, is very wide- field, massively multiplexed, and optical near-infrared spectrograph. Exploiting prime focus, 2394 reconfigurable fibers will be distributed in 1.3 degree-diameter field of view. The spectrograph system has been designed with 3 arms blue, red, cameras to simultaneously deliver spectra from 380nm 1260nm one exposure. instrumentation conducted by international collaboration managed...