1. Details of K1.8BR Beam line
Masami Iio

2. Horizontal extent @FF (rms) Vertical extent @FF (rms)
K1.8BR Beam Line PT
Max Momentum
1.1 GeV/c
Beam line length m
Acceptance
2.6 msr・%
Horizontal (rms)
6.1 mm
Vertical (rms)
3.0 mm

3. Envelopes of Kaon Beam
Vertical extent
Horizontal extent

4. Transport calculation by Turtle
< The definition of a beam >
Negative Kaon (1.1 GeV/c)
One half the Horizontal and Vertical extent : 0.3, 0.3 cm
One half the Horizontal and Vertical angular divergence : 100, 20 mr
Momentum bite : ±3%

5. K Beam Profile@FF (Position)

6. K Beam Profile@FF (Shape)

7. Angle of K

8. Position-angle correlation@FF

9. Momentum Bite

10. Position-Momentum bite correlation@FF

11. Back ground Pion Profile

12. Pion Profile@FF (Position)

13. Pion Profile@FF (Shape)

14. Angle of

15. Position-angle correlation@FF

16. Momentum Bite

17. Position-Momentum bite correlation@FF

18. Number estimation of particles

19. Momentum dependence of Acceptance
K- beam is cut to the slit in separator with the change of kick angle depending on momentum.

20. Physics process
Cross Section
Decay

21. K- Yield in the final focus
If Electric Field of Separator is fixed, Acceptance decreases.
If Kick Angle is fixed, decrease of Kaon is dominant in the Decay.

22. K/p
Profile (Y-position)
Mean shift

23. K/p (Fixed E)
If electric field of separator was fixed(50 kV/cm), K/Pi ratio improves as momentum of particle decreases.

24. K/p Ratio@FF (Fixed KA )
If Kick Angle of Kaon is fixed ( mrad), K/Pi ratio gets worse as momentum of particle decreases.