1. Beam Injection and Extraction Scheme
Vladimir Anferov

2. Injection-Extraction Overview
Single Turn operation
Two kickers create symmetric local orbit bump
Lambertson in the middle of the bump
to set the injected beam onto distorted closed orbit
to extract the beam off the distorted closed orbit
Multiple turn accumulation:
Phase space painting accumulation scheme
The kickers inject the beam off the closed orbit
Kickers switch strength to fill the acceptance

3. Kickers & Lambertson Location
24mrad kick 
32 mm orbit bump
Phase advance between kickers = p

4. Accumulation Upright phase space ellipse at the septum
Horizontal betatron tune is Qx = 1.75
Four turns can be injected off axis at one radius

5. Anticipated performance
Maximum orbit bump amplitude is limited by the 50mm aperture of the kicker.
Injection orbits are separated by 6mm, which comes from 2mm septum + 2mm space on each side
Septum Thickness = 2mm
Horiz. Aperture = ±25mm
Total Turns = 13
Phase radiuses = 0, 6, 12, 18mm
Beam size = 38mm

6. Kicker Design Specs Gap = 50 mm Length = 40 cm (or longer)
Rise time = 10 nsec
Voltage = kV at 25 MeV = kV at 50 MeV

7. CIS traveling wave kicker design

8. Kicker design issues
Feedthrough and vacuum can design for 10nsec rise time
Transition from 11cm wide elliptical chamber in the dipole to 5cm gap in the kicker.

9. Lambertson magnet specs
Bend angle = 20 deg
Yoke length = 10”
Field Gap = 1” (2.54 cm)
Field (for 60MeV)= kGauss
Septum width = mm
Leakage field < Gauss for <1mrad bend at 25 MeV

10. Lambertson magnet design
Assembly drawing
Vacuum chamber

11. Field Calculations

12. End pack

13. Conclusion
Injection scheme setup for either single turn (in & out) operation or multiple turn accumulation
Lambertson design is out for fabrication
Kicker design is not done yet