Speaker
Description
Standard axion search methods rely on resonant cavities with a strong magnetic field.
These cavities must be tuneable in discrete steps to search for axions with small linewidths.
In this talk we will discuss a different method for searching for axions based on broadband
search ideas. Specifically we will focus on the Axion Quark Nugget (AQN) model. The
AQN model is based on earlier quark nugget model with an added axion domain wall which
stabilizes the quark nugget. Axions produced in this model travel with a velocity of v 0.6c.
This means that line width of axions from the AQN model will be large ( 1 GHz) and this
will require a new detection strategy. We will discuss new methods for detecting broadband
axions including a search for daily modulations which, up until now, have been up until
now ignored in the literature. The idea is to collect the signal over entire season during
a specific hour and fitting the resulting power excess as a function of time (measured in
hours) during 24 hours period. We will discuss how a genuine signal can be discriminated
from a spurious signal and background noise by considering B=0 data and by studying the
phase drift of the daily modulations. Finally we will comment on how these broadband
searches may be applied to current axion cavity experiments.
