Update of Booster Alignment & Magnet Moves February 29, 2012

1. Update of Booster Alignment & Magnet Moves February 29, 2012 Bill Marsh, Kiyomi Seiya, Dean Still, Kent Triplet Alex Waller

2. Aperture scan Orbit smooth Alignment and Move

3. Aperture scan and offline analysis(1) • 1, Take Position and Dipole current data with ACL script • B:HP23L, B:VP23L, B:HL23T, B:VL23T • *some data was missing on the file from ACL. • *ACL script kept taking data every $17 event, even without beam. • *Position data was taken on one pulse behind from the one corrector current was taken. • *BPM offset from 5years ago. • 2, Select data in a reasonable area which can make linear fitting. • 3, Calculate scale and offset between position and dipole current. • Long-23 • H: scale= -0.80, offset= 10.81 (HP23L = scale * HL23T + offset) • V: scale= 4.65, offset=-23.00 (VP23L = scale * VL23T + offset) • 4, Reconstruct 20 x 20 dipole current data. • Data1[H_1, V_1] • : : • : • Data400[H_20, V_20] • 5, Combined the dipole current and charge data with scale and offset.

4. Aperture scan and offline analysis(2) w/o corrections with corrections New W75 is able to do analysis with the corrections.

5. Horizontal positions from scan Horizontal aperture -25/+30 mm @ SHORT -15/+15 mm @LONG

6. Vertical positions from scan Vertical aperture -7/+7mm @ SHORT -7/+12mm @LONG

7. H/V beam size at short and long bx @short = 33.7 bx @long = 6.1 by @short = 5.3 by @short = 20.4 @ LONG @ SHORT +/-17.9mm H_emittance(95%) = 14p mmmrad V_emittance(95%) = 16p mmmrad +/-9.15mm +/-21.5 mm +/-9.12 mm

8. Orbit smooth with B80 Desired position Before smooth After smooth

9. Intensity and beam loss after smooth Before smooth After smooth

10. Corrector current after smooth Horizontal Vertical

11. Aperture scan • Finished at all 48 location. • All analysis process will be automated on W75 • H aperture @ SHORT : -25/+30 mm ( beam size: +/- 21.5 mm) • @ LONG : -15/+15 mm ( beam size: +/- 9.15 mm) • V aperture @ SHORT : -7/+7 mm ( beam size: +/- 9.12mm) • @ LONG : -7/+12 mm ( beam size: +/- 17.9 mm) • Orbit smooth • Moved beam position at injection to the aperture center • at pd. 7 – pd. 23 using orbit smooth program. • Intensity and beam loss around rf periods were increased. • There was an offset on the horizontal corrector current.

12. Aperture restriction at short 14

13. Aperture scan with 3 bump + 5 bump Corrector + BPM D RF F Scan @ SHORT Scan @ LONG

14. Components restricted aperture BRF#16 Ext. kicker BRF#14 BRF#15 BRF#13 BRF#12 BRF#10 BRF#11 BRF#9 notcher V pinger BRF#17 Col.6 A Col. 6B BRF#18 BRF#19 Col. 7A BRF#7 BRF#8 BRF#5 BRF#6 nocker BRF#3 BRF#1 V pinger BRF#4 Ext. kicker BRF#2

15. Short section with correctors 114.3mm 41.66mm

16. L2 (4 x ext. kickers) L12 (old H pinger, nocker, V pinger, ext. kicker) 56.85mm 57.17mm 63.25mm

17. Aperture @ L12 & L11

18. L5 with H pinger and notcher 57.17mm 63.25mm

19. Aperture @ L5

20. L6 and L7 with collimators 57.17mm 76.2mm

21. L6 6B 6A Shielding Shielding

22. > 1 inch 6A Collimator Upstream Bellows

23. L14 – L24 with RF cavities 57.17mm 57.17mm

24. Radiation survey at L14 -24

25. RF cavity alignment error in H & V BRF19 5mm L15 L17 L18 L14 L16 BRF18 L21 L22 L19 L23 L24

26. Beam position at L19

27. Vertical alignment error on F & D magnets 5mm

28. Future plans • Align BRF#19, #18 and 17 • Align Pinger and Notcher at L5 • Align Ext. kickers, pinger and nocker at L2 & L12 • Orbit smooth with B80 from injection to flattop and remove the momentum offset in the correctors. • Review beam positions at the collimators. • Move magnet @ period 15