Latest progress on two new ALS-U beamlines for diffraction-limited performance
Year: 2026
Type: conference-paper
Abstract: The Advanced Light Source Upgrade (ALS-U) will increase soft X-ray coherent flux by 100×. We developed two new beamlines, engineered to minimize loss of brightness and utilize the advanced coherence of the light source. Each beamline uses a minimalist optical layout: a cryogenically-cooled silicon M1 mirror, a monochromator with variable-line-spacing gratings, and a final focusing M3 mirror. Optics are designed for Strehl ratio > 0.8 and sub-100 nrad vibration. A piezo-bimorph M3 mirror paired with a wavefront sensor allows for wavefront optimization. Fabrication is underway. New test data include at-wavelength efficiency measurements for blazed gratings, and motion performance of piezo-actuated pitch/roll flexure systems at cryogenic temperatures, granite air-bearing positioners, and monochromators.
Source: JACOW
Authors: Bergeret,Maxime, Islegen-Wojdyla,Antoine, Allézy,Arnaud, Jensen,Cody, Cocco,Daniele, DiMasi,Elaine, Gullikson,Eric, Cutler,Grant, Alvarez,Henry, Hervey,Jack, Goldberg,Kenneth, La Fleche,Kyle, Armstrong,Robin, Johnson,Ryan, Gleason,Samuel, Shah,Shrenik, Morton,Simon, Kumar,Subhalakshmi, Bryant,Diane
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7148446936
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