Maximiliano Silva-Feaver

Maximiliano Silva-Feaver

Postdoctoral Fellow
Physics

Biographical Sketch

I completed my bachelor’s in physics from Santa Clara University in 2015. In 2015-2016, I worked on developing microwave multiplexing electronics for X-ray and CMB sensor applications and designing the DM-Radio pathfinder experiment as a research assistant for Prof. Kent Irwin at Stanford University. I completed my doctorate in 2023, advised by Prof. Kam Arnold on developing the readout electronics and deploying the first Small Aperture Telescope for the Simons Observatory. I started as a Mossman Postdoctoral Fellow at Yale University’s Wright Laboratory in 2023, working on the analysis of Simons Observatory Small Aperture Telescope data and design and construction of the ALPHA and HAYSTAC-phase III axion haloscopes.

I believe that developing room for young members to succeed in large science collaborations is as essential as individual university support. To this end, I have actively developed structural changes to improve graduate and postdoctoral researcher representation within the Simons Observatory and ALPHA projects.

Research:

I work in the fields of Cosmology and Dark Matter direct detection. I am a member of the Simons Observatory (SO) Cosmic Microwave Background (CMB) experiment, and the HAYSTAC and ALPHA Axion direct-detection experiments.

For my Ph.D. research, I designed, constructed, deployed, and tested the first SO Small Aperture Telescope (SAT). Within SO, I focused on camera readout electronics: the SLAC Microwave Radio Frequency (SMuRF) electronics, which were custom built to read out the superconducting microwave multiplexer cryogenic circuit capable of measuring ~1000 superconducting camera pixels on a single readout line. I led early testing and design iteration with the SLAC (DoE National Research Laboratory) team. I ultimately oversaw the system integration and operation at the SO high-elevation site in the Atacama Desert in Chile. I maintained the telescopes since their commissioning (Oct 2023). In 2022, I began working on the SO SAT data reduction and analysis pipeline utilizing simulation and North American lab data as a predoctoral research fellow at the Flatiron Institute. I continue this effort with the on-sky data as a Yale Mossman Fellow.

I joined the HAYSTAC and ALPHA axion direct detection experiments at Yale. HAYSTAC is a microwave cavity haloscope that has set the tightest constraints on Axion-like dark matter in the 15-25 micro-electronvolt mass range operating since 2016. I am upgrading HAYSTAC to extend its sensitivity to a 30-35 micro-electronvolt mass range. ALPHA is a new experiment sited at Yale that will probe the 40-80 micro-electronvolt mass range using a new technique based on coupling the axion field to a tunable plasma resonance. I am designing and testing the ALPHA microwave receiver system and integrating the ALPHA haloscope at Yale.

Education

Ph.D., University of California, San Diego, 2023

Honors & Awards

Selected Publications

Contact Info

maximiliano.silva-feaver@yale.edu

WLC 258

PIs: Laura Newburgh and Reina Maruyama

Research Website

Research Areas: Astrophysics & Cosmology, Elementary Particles

Research Type: Experimentalist

Experiments

CV

LinkedIn

Experiments

ALPHA, HAYSTAC, RAY

Baker, Barrett, Brown, Heeger, Lamoreaux, Lehnert, Maruyama

Science Goal: Search for axion dark matter using quantum and microwave technologies.

WL Involvement: Yale is responsible for systems engineering, cryogenics, and magnetics. Lamoreaux and Maruyama are PIs of HAYSTAC, Maruyama is deputy spokesperson of ALPHA and PI of RAY.

Inside HAYSTAC axion dark matter experiment instrument.

CHIME

Newburgh

Science goal: Measure the expansion history of the Universe and discover insights about dark energy. 

WL involvement: The Newburgh group uses a technique called holography to map the beam shape of CHIME to be able to identify and remove emission from unintended sources.

CHIME radio telescopes.

News