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[Ross Corliss <ross.corliss AT stonybrook.edu>]

Optics recapitulates beam optics -- this looks like an accelerator beam tune instability plot.  There are certain orbits in the lightpipe that always hit the same places over and over again because they have a rational ratio of motion around the perimeter per bounce.  Close to these ratios lasts longer, farther from these dies faster because they drift away from the safe spots faster.  I'm amused here that it's inverted from the accelerator case, where one wants to avoid these beat patterns.  Here they're the good ones.

-Ross

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Dr. Ross Corliss

If it's work hours, and I'm not in a meeting, feel free to look for me in my virtual office:
(my zoom office is out of order, alas.  Reach out, though, and I can generate a link.)

On Oct 14, 2020, at 1:57 PM, Dan Cacace <dannycacace AT gmail.com> wrote:

For those interested, here is a quick update to the plot I showed earlier addressing Bob's two comments about using a quarter of the beam width and snell's law. You can definitely see an interesting pattern, but again take it with a grain of salt. It will be good to see a "proper" plot from Kristina.

<image.png>

-Dan

On Thu, Oct 8, 2020 at 5:51 PM Bob Azmoun <azmoun AT bnl.gov> wrote:

Dear All,

This is a friendly reminder that we will have our weekly laser calibration meeting tomorrow at 9am. 

A link to the Indico page is here: https://indico.bnl.gov/event/9800/

and the bluejeans link is here: https://bluejeans.com/881710315

I put together a tentative agenda, but please feel free to modify it and upload any material you wish to present. 

As discussed, here is the laser system procurement list in google sheets: 

https://docs.google.com/spreadsheets/d/1IJ38FGIPg8_reQmr9sdhti9CY17jYKDnwaR7MtfHOcY/edit?usp=sharing 

Talk to you tomorrow!

Cheers,

Bob

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B. Azmoun
Brookhaven National Laboratory
Physics Dept. Bldg. 510 C
Upton, NY 11973
P: (631) 344-4082
F: (631) 344-3253
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