[FFA_CEBAF_Collab] [EXTERNAL] FFA arc cells with correct scaling in sharepoint

[Brooks, Stephen]

I applied the "rescalings" to the 4+4 turn (or 4+3) FFA design to get sensible magnets.  The results are in:

Optics > FFA Arcs > Jul'21_4+4_optimised

There you can find: original lattice, component list output, betas etc. at a couple of match points at all the energies.  Also pictures of magnets.

For FFA2, I used "50% gradient scaling", which makes the magnets have 2cm vertical aperture in the centre and 8mm total midplane gap on the sides.  For FFA1, I retained those apertures but used 75% gradient scaling, as otherwise the BF beam excursion became very large horizontally.  FFA1's lattice cell in the 4+4 design is a bit odd, with a short but high gradient BD and a weak, long and wide BF.  The magnets are pretty reasonable despite this, though, so perhaps it is "optimised" after all.

     -Stephen


________________________________________
From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces at jlab.org> on behalf of Ryan Bodenstein via FFA_CEBAF_Collab <ffa_cebaf_collab at jlab.org>
Sent: 18 February 2022 12:21
To: Alex Bogacz; ffa_cebaf_collab at jlab.org
Subject: Re: [FFA_CEBAF_Collab] FFA at CEBAF WG mtg. this Friday, Feb. 18 at 11:00 am

Hello Colleagues,

Another productive meeting! We discussed a lot of topics, and are likely going to be working and planning hard this week for the FOA and other work.

I’ve attached the minutes to this email, and will upload them to the repository shortly.

You all have a great weekend!

Cheers!
Ryan

From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces at jlab.org> on behalf of Alex Bogacz <bogacz at jlab.org>
Date: Monday, February 14, 2022 at 6:04 PM
To: ffa_cebaf_collab at jlab.org <ffa_cebaf_collab at jlab.org>
Subject: [FFA_CEBAF_Collab] FFA at CEBAF WG mtg. this Friday, Feb. 18 at 11:00 am
Dear Colleagues,

We will continue design work on adiabatic arc design, this Friday, Feb. 18 at 11:00 am.
  *  Adiabatic arc design update – Vasiliy/Randy
  *  AOB – All
Please, follow a ZOOM invitation below.
Cheers,
Alex
 ___________________________________
S. Alex Bogacz,
Accelerator Physics Group Leader
Center for Advanced Studies of Accelerators
Jefferson Lab
12000 Jefferson Avenue,<x-apple-data-detectors://8>


ZOOM connection:

The link is here: https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1614898082-3Fpwd-3DTnUzMS81M2sxbDZIbERJU01tYkJCQT09&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=Ogg4WFNBwvADBq3fkmCLiJ7SaRDPYtawHzJElJMB0jE&m=1xTBq88L8UI8x-4n5CPsh6w9UKxq3rIcP7BBx143j13P3eGXFr4Vg1btX1ei7Lxt&s=Nc-HwsgFC6kICNgKGaW6yV-QI3xNMjmAenlcqgGZYhw&e= <https://urldefense.com/v3/__https://jlab-org.zoomgov.com/j/1614898082?pwd=TnUzMS81M2sxbDZIbERJU01tYkJCQT09__;!!P4SdNyxKAPE!Rq2Ce3MBdEjpHku5Dv58r-sMHF6v3M416sbNlfr2lMVef_5Rb5lqDL1dnYgAHyU$>

In case of problems, the zoom room is below:
Meeting ID: 161 489 8082
Passcode: 123456