1. Transfer Line for EIC

2. Proposed EIC layout

3. Transfer line requirements
Achromatic
Keep Sync. Rad. Growth under control
Room for matching region, diagnostic region
Room for compression chicane if needed
Room to make a spreader step
Minimize number of dipoles (cost)

4. EIC Ion ring and e- ring IP IP
Injection

5. Electron ring CEBAF coordinates
Injection

6. Option 1 design choices Utilizes 3.6 meters dipoles (68 of them)
Quadrupoles are QR type (73 of them)
120 degrees FODO.
First ARC bends degrees.
Second ARC bends in other direction
Injecting at degrees. Leaving 10mrad for septum.
Straight of 21 meters between the two arcs.
Straight of 23 meters after 2nd arc (matching quads in it)

7. Proposed transfer line

8. CEBAF to EIC

9. Optical properties

10. Emittance growth
0.11 mm normalized

11. Alternate option
Making the design choice that one can inject at the 90 degrees point. (Assuming beam quality is not an issue when doing trickle injection).
Drastic reduction in footprint, number of magnets and consequently cost.
Almost no synch rad loss. Beam quality preserved.

12. Alternate option

13. Emittance growth option 2
80 μm.rad

14. Optical properties option 2

15. Component count and layout
Option
Quads
Dipoles
Tunnel length (m)
#1 injecting front of arc 73 68
382
#2 injection at 90 degs. 46 16
285

16. Ring Injection We will start with a PEPII like design:
Dispersion free injection insertion
Septum+ RF kickers
Insertion with five quad, one of them split to inject and upright beam ellipse
Closed orbit will be bumped by RF and DC kickers
Vertical injection because of greater dynamic aperture in this plane and absence of synchrotron oscillations.

17. Things to check Beam quality after half an arc
Effect of injected beam (still in the process of damping) on detectors (need to design collimators to be installed in the rest of the arc for beam dumping and envelope control)
Beam Beam effects due to degraded injected beam
Effect on polarization (dilution?)