Russell Roberts

Optimizing Field Geometry for Modular Micropore-Optics Soft X-ray Time-Domain Surveys

N. E. White, Massimiliano Galeazzi, Russell Roberts, K. D. Küntz

Wide-field micropore (lobster eye) optics enable focusing soft X-ray instruments with fields of view of hundreds of square degrees, but square-format modules require careful geometric arrangement to support both wide-area surveys and sensitive pointed observations. We examine this design problem using the …

XTRA: the x-ray transient array

N. E. White, Massimiliano Galeazzi, Daniel Kocevski, J. Eric Grove et autres

XTRA (X-ray TRansient Array) is a NASA Small Explorer concept designed for 2030s time-domain and multimessenger astrophysics. Operating in a Sun–Earth L2 orbit, XTRA makes time-domain surveys and provides rapid autonomous response to high-energy transients. The payload combines the Burst Alert Monitor …

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The lobster eye x-ray telescope

Kayla Spencer, Massimiliano Galeazzi, Russell Roberts, Madison Pacheco et autres

The Lobster Eye X-ray Telescope (LXT) utilizes micropore (lobster eye) optics to address a key limitation in current X-ray instrumentation for a wide field of view. When coupled with large-area CCD detectors, the instrument achieves good angular resolution and energy resolution across …

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Predicting micropore optic performance based on pore wall surface measurements

Kayla Anissa Benzaid-Williams, Brian M. Walsh, J. William Boley, Russell Roberts et autres

Micropore optics (MPOs) are a style of grazing incidence optics used in astrophysics and heliophysics applications for imaging X-rays over a large field of view. They are composed of an array of high aspect ratio square channels tens of microns in width, …

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Polished titanium substrates for x-ray mirrors

Russell Roberts, M. Galeazzi, K. D. Küntz, Rousseau Nutter et autres

The fabrication of x-ray mirrors requires achieving ultra-flat, low surface roughness substrates for high x-ray reflectivity. The fabrication pipeline presented here involves commercial sheets of Ti-6Al-4V (Ti64) that are initially flattened through restrained stress relief annealing. These sheets are then polished using …

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Manufacturing methods and technology (MMTE) measure for fabrication of low voltage start sealed beam arc lamps

Edward Chan, Tim Bell, Russell Roberts

A program is in progress to establish a production capability for the purpose of meeting estimated military needs for the X6335, a 1kW sealed beam xenon arc lamp with low voltage starting mechanism. In accordance with the requirements of the contract, the …