Recent content by Twigg

Is there a typo in there? Specifically: Isn't that too many electrons for Yb+?

I think this is similar to my plan B of using a wire to suspend the mass. I agree this is definitely a cleaner way of getting the desired constraint. However, the rubber pads (if they work) would significantly simplify the assembly because I wouldn't need to add features to anchor the the wires...

Hi all! Usually, one would model a rubber as incompressible (##\nu \rightarrow \infty## or equivalently ##\kappa \rightarrow \infty##, where ##\nu## is Poisson ratio and ##\kappa## is bulk compressibility). However, I am trying to use rubber in an application where performance will improve the...

Not sure I understand the question. It isn't known until it's measured. Typically the initial position of an ion depends on how it's loaded to the trap. I am sure the probability distribution for loading an ion would be very different in the ALPHA experiment compared to the electron g-2...

You might be right. As far as nuclear P-violating effects, you probably know more than I do. What I can say is that there is a common understanding in eEDM experiments that you can't distinguish between an eEDM signal and a parity-violating interaction that involves the nucleus. If one...

I don't believe so. Even if you had sufficient phase matching, the spectral intensity of white light sources is much, much lower than a laser. Since frequency doubling and tripling are nonlinear processes, the doubling/tripling efficiency falls with lower intensity. However, there are spectral...

Are you side-locking or locking using modulation (PDH, lock-in, etc.)? If side-locking, that sounds right. As a rule of thumb, the signal you want to put on the spectrum analyzer is whatever signal normally goes into the PID servo. So, for example, if you were PDH locking, you would put the...

Sorry, one final final follow-up. Since you have a bowtie cavity and only 10,000 finesse, your mirrors are probably on kinematic mirror mounts, yes? Sorry, I'm used to much more annoying cavities where the mirrors are optically contacted onto rigid spacers, so a cleaning or re-contacting...

A quick follow-up on this. I was just playing around with a cavity today, and found that compressed nitrogen can actually work for removing dust from cavity mirrors (it wasn't perfect, but it had an effect). I would avoid dust-off out of fear of spraying non-volatile residue on the mirrors...

STIRAP is a form RAP (adiabatic passage). Adiabatic passage means that the quantum state needs to be preserved. If your laser linewidth is broader than the splitting between the bottom 2 states, then you will progress into a mixed state as the randomized fluctuation of the laser phase will...

Sorry for the late reply. I have bad news for you. I take you've optimized your alignment and played with the beam diameter. Assuming that, the reason you see a low reflection contrast (the height of the dip in reflection) is most likely the same reason you have a broad linewidth. What you're...

Yeah, no. That'll make some nice fiber flambé. You had the right idea going free space. But you can actually still make it work with a fiber EOM. Sure you can. You basically already said it. Split a milliwatt or two off your main beam and send it into a fiber EOM (or free space EOM, whichever...

I haven't used one myself, but all of my coworkers who have ended up switching to fiber EOMs just due to the sheer hassle (getting the requisite voltage, and alignment issues resulting in residual amplitude modulation). I think the only good reason to use a free space EOM is if you absolutely...

Your Hamiltonian has a constant Rabi rate and a time-dependent detuning. What would you expect in the limit where ##B \rightarrow 0##? Well, A is your Rabi rate and you'd expect Rabi flopping at a timescale ##\frac{1}{A}## (up to factors of ##2\pi##, which I always mess up). Based on your...

One final update on this thread. After taking a truly painful amount of data, we found that the magnitude of non-reproducible changes in the elasticity of the sapphire plate are linearly related to the coefficient of static friction between the sapphire plate and the ball bearings. In other...