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BEGIN:VEVENT
DTSTAMP:20261014T142154Z
LAST-MODIFIED:20210205T220538Z
DTSTART:20210222T190000Z
DTEND:20210222T210000Z
UID:event2398@bu.edu
URL:http://physics.bu.edu/internal/events/show/2398
SUMMARY:CASPEr-Electric - first results and next generations
DESCRIPTION:Featuring Janos Adam\, Boston University Physics Department\n\n
	Part of the Preliminary Oral Exam.\n\nAstronomical evidence suggests that m
	ost of the matter in the universe is made of particles whose properties are
	 not understood yet. The existence of dark matter would solve this conundru
	m. However\, only gravitational effects of dark matter have been observed f
	ar\, therefore there are many possible candidates. One well motivated candi
	date is the axion. Experimental searches rely on its interactions with stan
	dard model particles. One of these interactions – the nucleon EDM couplin
	g – is probed by the CASPEr-Electric experiment. An axion field creates a
	n oscillating nuclear electric dipole moment which interacts with a static 
	electric field. This interaction will tilt the nuclear spins similarly to a
	n NMR experiment.\n\nIn this talk I will start with a brief introduction ab
	out the basics of dark matter\, axions and describe how CASPEr-Electric ope
	rates. I will present our first results which searched for axion-like dark 
	matter near the Compton frequency of 40 MHz (arXiv:2101.01241). Then I will
	 cover our ongoing efforts to probe the 1 kHz – 1MHz range using SQUIDs. 
	Ultimately I will talk about optical excitation of paramagnetic centers in 
	a ferroelectric crystal used in CASPEr. I will cover how these centers allo
	w us to control the relaxation times of a nuclear spin ensemble and how we 
	can utilize this effect in the future phases of CASPEr.
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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