I don't think you need very high temperatures to move alkali atoms
like Cs, Rb, or Na around in a vapor cell. The trick is to have one part of
the cell much colder than the rest. The Cs will automatically go the
coldest spot. The temperature just sets the rate at which it moves. I
remember
There's an interesting and more readable PRL by the same group,
published last year on June 2 . Its on arXiv: 1110.2379v1 . or PRL 106,
223001 (2011). They have already built the trap and have laser-cooled the
Thorium ions (cool pictures of the ion crystals). Their current problem is
thanks for the comments. I'm off on a vacation for 1 week followed by a
conference for 1 week. My connectivity may be poor, so I'll reply when I
get back.
Ralph
KM6IYN
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Hi,
The fitting routine only takes up 40 uS of the 1 sec interval
between measurements, as shown in Fig. 1 of the paper. This is less than
10(-4) of the measurement interval. It just determines the phase difference
at the start of every second. I don't think the filtering effect is very
Hi Time-nuts and Attila,
Thanks for the very interesting and informative criticisms. That
is what I was looking for. I don't agree with most of them, but I need
some time to work out some detailed answers.
To focus on the forest instead of the trees: The method uses a
$300
Here's a short reply to the comments of Bob, Attila, Magnus, and others.
Thanks for reading the paper carefully. I appreciate it. Some of the
comments are quite interesting, other seem off the mark. Let's start with
an interesting one:
The issue I intended to raise, but which I'm not sure I
I've been comparing the ADEV produced by the sine-wave fitter (discussed
last November) with that of a counter-based system. See the enclosed plot.
We ran the test in Leo Hollberg's lab at Stanford, using a 5071a Cesium
standard and my own 5065a Rubidium standard. Leo first measured the ADEV
using
Hi Tom,
to reply to your questions:
(1) Yes, I was also surprized at how good the 5065a is. It's a stock unit
that has apparently never been repaired or modified. I'm guessing it was
turned off for a long time (the seller said it was stored in an unheated
container in Alaska). Leo's lab is very
Are schematics available?
Ralph
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