[FFA_CEBAF_Collab] [EXTERNAL] FFA at CEBAF WG mtg. this Friday, May 5, at 11:00 am

[Brooks, Stephen]

I think that "mystery scaling law" that looks like:

f(x) = 3x^2-2x^3
x goes from 0 to 1
Cell length = start*(end/start)^f(x)

...is one I suggested for CBETA, just using f(x) linearly for dipoles and offsets.  Then, for length and beta functions that can't go below zero, I suggested to Dejan to use the "log scale" version with f(x) in the exponent.

f(x) is the cubic polynomal that satisfies f(0)=0, f(1)=1, f'(0)=f'(1)=0, so it smoothy connects 0 to 1.

For the CBETA adiabatic transitions, Scott Berg eventally optimised a quintic polynomial to improve performance further, but this cubic is often a good generic starting point.

     -Stephen

________________________________________
From: Donish Khan <dkhan at jlab.org>
Sent: 05 May 2023 14:18
To: Brooks, Stephen; Alex Bogacz via FFA_CEBAF_Collab
Subject: Re: [EXTERNAL] [FFA_CEBAF_Collab] FFA at CEBAF WG mtg. this Friday, May 5, at 11:00 am

Ahh, seems like my Mac converted the word file to pages automatically. I’ll get it to docx but in the meanwhile I’ve attached a pdf (uploaded to the share folder as well).

Let me know if that doesn’t work.

Thanks,
Donish



On May 5, 2023, at 2:12 PM, Brooks, Stephen <sbrooks at bnl.gov> wrote:

I can't open a ".pages" file here.  Do you have a Word, RTF or text document?

    -Stephen

________________________________________
From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces at jlab.org<mailto:ffa_cebaf_collab-bounces at jlab.org>> on behalf of Donish Khan via FFA_CEBAF_Collab <ffa_cebaf_collab at jlab.org<mailto:ffa_cebaf_collab at jlab.org>>
Sent: 05 May 2023 14:09
To: Alex Bogacz
Cc: Alex Bogacz via FFA_CEBAF_Collab
Subject: Re: [FFA_CEBAF_Collab] FFA at CEBAF WG mtg. this Friday, May 5, at 11:00 am

Hi All,

Great discussions today. Attached you’ll find our minutes (as well as in the shared folder, which is also linked at the bottom of the attached minutes).

Happy Friday and have a great weekend!

Thanks,
Donish





On May 1, 2023, at 9:17 PM, Alex Bogacz via FFA_CEBAF_Collab <ffa_cebaf_collab at jlab.org> wrote:


Dear Colleagues,

We will continue our design efforts on Friday, May 5, at 11:00 am.

*  Final look at IPAC’23 contributions – Alex

*  Parametric resonance optics for a compact merger – Vasiliy, Randi

*  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,


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=qAyOUABfRmuk_W1BX9AvMg&m=jnmHf29oSXyjMAJ_DRjgO9pl4NDTsbBXhT5rN8XAxC6b5ml_x5-qzDJfzQYDlNM5&s=CzzEFKiy36lBGhpuVtt3j0uLvnMKSNMIjgZR66XaUWw&e= <https://urldefense.com/v3/__https://jlab-org.zoomgov.com/j/1614898082?pwd=TnUzMS81M2sxbDZIbERJU01tYkJCQT09__;!!P4SdNyxKAPE!Ar4Gt-dzzXW3hMKh61Wu0jcWE8CDoQL-F4dLn1PS6CEazU1PF_Sa5URQlbggVLB_ht0M5AYPK6FgkMKCGzHns1KV_WI$>

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




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