Datesman, Aaron M.Adams, Joseph S.Bandler, Simon R.Betancourt-Martinez, Gabriele L.Miniussi, AntoineSakai, KazuhiroSmith, Stephen J.Wakeham, Nicholas A.et al2022-01-202022-01-202017-01-09A. M. Datesman et al., "Reduced-Scale Transition-Edge Sensor Detectors for Solar and X-Ray Astrophysics," in IEEE Transactions on Applied Superconductivity, vol. 27, no. 4, pp. 1-5, June 2017, Art no. 2100505, doi: 10.1109/TASC.2017.2649839.https://doi.org/10.1109/TASC.2017.2649839http://hdl.handle.net/11603/24028Aaron M. Datesman, Joseph S. Adams, Simon R. Bandler, Gabriele L. Betancourt-Martinez, Meng-Ping Chang, James A. Chervenak, Megan E. Eckart, Audrey E. Ewin, Fred M. Finkbeiner, Jong Yoon Ha, Richard L. Kelley, Caroline A. Kilbourne, Antoine Miniussi, Frederick S. Porter, John E. Sadleir, Kazuhiro Sakai, Stephen J. Smith, Nicholas A. Wakeham, Elissa H. Williams, Edward J. Wassell, and Wonsik YoonWe have developed large-format, close-packed X-ray microcalorimeter arrays fabricated on solid substrates, designed to achieve high energy resolution with count rates up to a few hundred counts per second per pixel for X-ray photon energies up to 8 keV. Our most recent arrays feature 31-micron absorbers on a 35-micron pitch, reducing the size of pixels by about a factor of two. This change will enable an instrument with significantly higher angular resolution. In order to wire out large format arrays with an increased density of smaller pixels, we have reduced the lateral size of both the microstrip wiring and the Mo/Au transition-edge sensors (TES). We report on the key physical properties of these small TESs and the fine Nb leads attached, including the critical currents and weak-link properties associated with the longitudinal proximity effect.5 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domain Mark 1.0Text