Lyman-ultraviolet imaging filter development for the FLUID rocket payload

Farr, Emily; Kruczek, Nicholas E.; France, Kevin; Nell, Nicholas; Behr, Patrick; Ulrich, Stefan; Larruquert, Juan; Honrado, Carlos; Reyes, Paloma

doi:10.1117/12.2677932

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Results from this calibration run and additional aging studies are discussed in detail in Ref. 38. Bonding of the F110M secondary optic has been completed, and final telescope assembly and alignment occurred in September through November 2023.…”

Section: Assemblymentioning

confidence: 99%

Far- and Lyman-ultraviolet imaging demonstrator: a rocket-borne pathfinder instrument for high efficiency ultraviolet band selection imaging

Nell,

Kruczek,

France

et al. 2024

J. Astron. Telesc. Instrum. Syst.

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The Far-and Lyman-ultraviolet imaging demonstrator (FLUID) is a rocket-borne arcsecond-level ultraviolet (UV) imaging instrument covering four bands between 92 and 193 nm. FLUID will observe nearby galaxies to find and characterize the most massive stars that are the primary drivers of the chemical and dynamical evolution of galaxies and the co-evolution of the surrounding galactic environment. The FLUID short wave channel is designed to suppress efficiency at Lyman-α (121.6 nm) while enhancing the reflectivity of shorter wavelengths. Utilizing this technology, FLUID will take the first ever images of local galaxies isolated in the Lyman UV (90-120 nm). As a pathfinder instrument, FLUID will employ and increase the technology readiness level of band-selecting UV coatings and solar-blind UV detector technologies, including microchannel plate and solid-state detectors; technologies that are prioritized in the 2022 NASA Astrophysical Biennial Technology Report. These technologies enable high throughput and high sensitivity observations in the four coaligned UV imaging bands that make up the FLUID instrument. We present the design of FLUID, status on the technology development, and results from initial assembly and calibration of the FLUID instrument.

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Section: Assemblymentioning

confidence: 99%

Far- and Lyman-ultraviolet imaging demonstrator: a rocket-borne pathfinder instrument for high efficiency ultraviolet band selection imaging

Nell,

Kruczek,

France

et al. 2024

J. Astron. Telesc. Instrum. Syst.

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“…The future technology of LUMOS is currently being tested with the Far-and Lyman-Ultraviolet Imaging Demonstrator (FLUID) sounding rocket payload, with important scientific goals of identifying the VUV morphological characteristics of low redshift galaxies for the first time in the spectral range of 100 to 115 nm [ 4,5 ]. The proposed telescope mirrors for the FLUID payload are different medium-and narrow-bands tuned in different parts of the VUV, which will be developed by GOLD-IO-CSIC [ 6 ] (GOLD is the Spanish acronym for Thin Films Optics Group, Madrid, Spain), following two different approaches.…”

Section: Introductionmentioning

confidence: 99%

Narrowband mirrors based on fluorides tuned at vacuum ultraviolet wavelengths

López-Reyes,

Honrado-Benítez,

Gutiérrez-Luna

et al. 2024

Advances in Optical Thin Films VIII

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The interest of the astrophysics community to make space observations in the vacuum ultraviolet (VUV, triggers the research to overcome the challenges to develop efficient VUV optics due to material absorption and the limited knowledge of optical constants. Future space observatories like the "Habitable Worlds Observatory, HWO/NASA" require efficient coatings capable of providing high-throughput image bandpasses in the VUV which is currently included as a NASA technology gap. Among the scarce transparent materials in this range, some metal fluoride materials exhibit the shortest cutoffs. Typically, highreflective narrowband coatings consist of periodic combinations of fluoride multilayers (MLs), with relatively high contrasting refractive index, such as MgF2/LaF3 or AlF3/LaF3 MLs.In this context, GOLD-IO-CSIC group has been developing high-performance all-dielectric VUV coatings, with special emphasis on short wavelengths down to 120 nm. This short VUV range is relatively unexplored and shows a comparatively lower performance due to the increased absorption of fluorides towards shorter wavelengths. Here, we present coatings based on combinations of MgF2/LaF3 and AlF3/LaF3 MLs, which can be tuned at any VUV wavelength >120 nm with a remarkable performance above 85% at H Ly-α (121.6 nm) for AlF3/LaF3 MLs; this improves the state-of-the-art at such short wavelengths. We also present a comparative study on the nanostructural morphologies of the two sets of MLs.Both the selection of the ML materials and the introduction of some aperiodicity on the ML designs allow choosing the bandwidth or the desired optical profile with remarkable freedom.Below ~120 nm there is no suitable combination of fluorides since all fluorides but LiF turn absorbing. We, then, present narrowband coatings based on Al, LiF, and SiC films, tuned at ~100 nm, with a strong rejection at the close H Ly-α line that could mask the observations.

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FLUID: a rocket-borne pathfinder instrument for high efficiency UV band selection imaging

Nell,

Kruczek,

France

et al. 2023

UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII

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The Far-and Lyman-Ultraviolet Imaging Demonstrator (FLUID) is a rocket-borne multi-band arcsecond-level Ultraviolet (UV) imaging instrument covering four bands between 92 – 193 nm. FLUID will observe nearby galaxies to find and characterize the most massive stars, the primary drivers of the chemical and dynamical evolution of galaxies, and the co-evolution of the surrounding galactic environment. The FLUID short wave channel is designed to suppress efficiency at Lyman alpha wavelengths, while enhancing the reflectivity of shorter wavelengths. Utilizing this technology, FLUID will take the first ever images of local galaxies isolated in the Lyman ultraviolet. As a pathfinder instrument, FLUID will employ and increase TRL of band-selecting UV coatings, and solar-blind UV detector technologies including microchannel plate and solid-state detectors; technologies prioritized in the 2022 NASA Astrophysical Biennial Technology Report. These technologies enable high throughput and high sensitivity observations in four co-aligned UV imaging bands that make up the FLUID instrument. We present the design of FLUID, status on the technology development, and results from initial assembly and calibration of the FLUID instrument.

show abstract

Lyman-ultraviolet imaging filter development for the FLUID rocket payload

Cited by 4 publications

References 15 publications

Far- and Lyman-ultraviolet imaging demonstrator: a rocket-borne pathfinder instrument for high efficiency ultraviolet band selection imaging

Far- and Lyman-ultraviolet imaging demonstrator: a rocket-borne pathfinder instrument for high efficiency ultraviolet band selection imaging

Narrowband mirrors based on fluorides tuned at vacuum ultraviolet wavelengths

FLUID: a rocket-borne pathfinder instrument for high efficiency UV band selection imaging

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