High-Frequency Resonant Cavities for the Detection of Axion Dark Matter

I. Stern; A.A. Chisholm; J. Hoskins; J. Hwang; C. Martin; P. Sikivie; N.S. Sullivan; D.B. Tanner; C. Boutan; M. Hotz; D. Lyapustin; G. Rybka; A. Wagner; L.J. Rosenberg; S.J. Asztalos; G. Carosi; C. Hagmann; D. Kinion; K. Van Bibber; R. Bradley; J. Clarke

High-Frequency Resonant Cavities for the Detection of Axion Dark Matter

ORAL

Abstract

The axion is a plausible dark matter candidate. The Axion Dark Matter eXperiment (ADMX) has conducted axion searches in the mass range of 1.9 -- 3.5 $\mu $eV (460 -- 850 MHz). Next-generation cavity designs will enable the exploration of a significantly larger portion of the favored dark matter axion mass-coupling phase space. ADMX is researching higher resonant frequency cavity designs, with Q-factor and effective volume comparable to or greater than the current experiment. Current concepts include segmented resonators, tunable periodic arrays, and superconducting hybrid cavities. The segmented resonator divides the cavity into equal volume sections, and combines the power (in phase) of each section. The tunable periodic arrays can be manipulated within the cavity to vary the resonance modes at high frequencies. Superconducting hybrids will use thin-film superconducting walls to obtain significantly higher Q-factors. Recent advances and future plans for cavity research will be presented.

^*Supported by DOE Grants DE-FG02-97ER41029, DE-FG02-96ER40956, DE-AC52-07NA27344, and DE-AC03-76SF00098, and the Livermore LDRD program.

March 31, 2012, 4:18 PM – March 31, 2012, 4:30 PM

Authors

I. Stern
- U. of Florida
A.A. Chisholm
- U. of Florida
J. Hoskins
- U. of Florida
J. Hwang
- U. of Florida
C. Martin
- U. of Florida
P. Sikivie
- U. of Florida
N.S. Sullivan
- U. of Florida
D.B. Tanner
- U. of Florida
C. Boutan
- U. of Washington
M. Hotz
- U. of Washington
D. Lyapustin
- U. of Washington
G. Rybka
- U. of Washington
A. Wagner
- U. of Washington
L.J. Rosenberg
- U. of Washington
S.J. Asztalos
- Lawrence Livermore National Laboratory
G. Carosi
- Lawrence Livermore National Laboratory
C. Hagmann
- Lawrence Livermore National Laboratory
D. Kinion
- Lawrence Livermore National Laboratory
K. Van Bibber
- Naval Postgraduate School
R. Bradley
- National Radio Astronomy Observatory
J. Clarke
- U. of California, Berkeley