[FFA_CEBAF_Collab] [EXTERNAL] 650MeV injector with positrons

[Brooks, Stephen]

--[Would you consider using directly the 650 MeV e- to generate the positrons, which are then collected to 110 MeV for injection into the 3 cryomodules and return loop, again to 650 MeV e+ ?]--

Yes, that's the motivation for showing it this way.  This answers Jay's question about why I made a design that allows e- and e+ to be accelerated *simultaneously*.  You can't have e+ without e-, or at least I assume not!

     -Stephen


________________________________________
From: Joe Grames <grames at jlab.org>
Sent: 13 March 2022 14:20
To: Brooks, Stephen; Alex Bogacz
Subject: Re: [FFA_CEBAF_Collab] [EXTERNAL] 650MeV injector with positrons

Would you consider using directly the 650 MeV e- to generate the positrons, which are then collected to 110 MeV for injection into the 3 cryomodules and return loop, again to 650 MeV e+ ?

Joe

________________________________
From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces at jlab.org> on behalf of Alex Bogacz via FFA_CEBAF_Collab <ffa_cebaf_collab at jlab.org>
Sent: Friday, March 11, 2022 8:45 PM
To: Brooks, Stephen <sbrooks at bnl.gov>
Cc: ffa_cebaf_collab at jlab.org <ffa_cebaf_collab at jlab.org>
Subject: Re: [FFA_CEBAF_Collab] [EXTERNAL] 650MeV injector with positrons

Thanks Stephen,
Let’s discuss it this Friday.

Cheers,


Alex

___________________________________

S. Alex Bogacz,

Accelerator Physics Group Leader

Center for Advanced Studies of Accelerators

Jefferson Lab

12000 Jefferson Avenue,

Newport News, VA 23606

___________________________________
Sent from my iPhone

On Mar 11, 2022, at 2:21 PM, Brooks, Stephen via FFA_CEBAF_Collab <ffa_cebaf_collab at jlab.org> wrote:

I made this schematic (slide 2) of how you could get e+ and e- through the single-loop 650MeV injector without having to go on both sides of the linac.  You can stack vertically with verticals splitting dipoles.

    -Stephen
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