Engineering topics

Rosenberg, Leslie

Publications and source records attributed to Rosenberg, Leslie.

5 records

DOE OSTI2021

Axion dark matter experiment: Run 1B analysis details

Searching for axion dark matter, the ADMX Collaboration acquired data from January to October 2018, over the mass range 2.81–3.31 μeV, corresponding to the frequency range 680–790 MHz. Using an axion haloscope consisting of a microwave cavity in a strong magnetic field, the ADMX experiment excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions at 90% confidence level and 100% dark matter density over this entire frequency range, except for a few gaps due to mode crossings. This paper explains the full ADMX analysis for run 1B, motivating analysis choices informed by details specific to this run.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗

DOE OSTI2018

Piezoelectrically Tuned, Multimode Cavity Search for Axion Dark Matter

The eV axion is a well-motivated extension to the standard model. The Axion Dark Matter 27 eXperiment (ADMX) collaboration seeks to discover this particle by looking for the resonant con28 version of dark-matter axions to microwave photons in a strong magnetic eld. In this paper we 29 report results from an ADMX pathnder experiment, the ADMX \Sidecar", which is designed to 30 pave the way for future, higher mass, searches. The Sidecar experiment excludes masses in three 31 widely spaced frequency ranges (4202-4249 MHz, 5086-5799 MHz and 7173-7203 MHz), correspond32 ing to masses favored by some cosmic string simulations. In addition, Sidecar demonstrates the 33 successful use of piezoelectric actuators for both cavity tuning and antenna coupling. Finally, this publication is the rst to report data taken on both the TM010 and TM020 modes.

Boutan, Christian R.↗

DOE OSTI2018

Listening for Dark Matter with ADMX

The Axion Dark Matter Experiment (ADMX) is on the hunt for theoretical particles called axions, which may solve the dark matter mystery. ADMX, managed by Fermilab and housed at the University of Washington, is the first and only experiment of its type with the sensitivity to detect axion dark matter particles. For more information, please visit https://news.fnal.gov/2018/04/admx-announces-breakthrough-in-axion-dark-matter-detection-technology/ and https://www.fnal.gov/pub/science/particle-physics/experiments/admx.html

79 ASTRONOMY AND ASTROPHYSICS↗

DOE OSTI2015

Single-electron detection and spectroscopy via relativistic cyclotron radiation

It has been understood since 1897 that accelerating charges should emit electromagnetic radiation. Cyclotron radiation, the particular form of radiation emitted by an electron orbiting in a magnetic field, was first derived in 1904. Despite the simplicity of this concept, and the enormous utility of electron spectroscopy in nuclear and particle physics, single-electron cyclotron radiation has never been observed directly. Here we demonstrate single-electron detection in a novel radiofrequency spectrometer. We observe the cyclotron radiation emitted by individual electrons that are produced with mildly-relativistic energies by a gaseous radioactive source and are magnetically trapped. The relativistic shift in the cyclotron frequency permits a precise electron energy measurement. Precise beta electron spectroscopy from gaseous radiation sources is a key technique in modern efforts to measure the neutrino mass via the tritium decay endpoint, and this work is a proof-of-concept for future neutrino mass experiments using this technique.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗

DOE OSTI2015

Theoretical and Experimental Physics

We report on progress towards finding axion dark matter, neutrino oscillation parameters, Use of the gravity/gauge correspondence to to calculations in strongly coupled systems, use of jet substructure to search for new physics, use of lattice QCD to compute weak matrix elements, constraints on dark matter interactions from neutron stars, exotic Higgs searches, and new dark matter models.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗