Update of Booster Alignment & Magnet Moves February 29, 2012

Update of Booster Alignment & Magnet Moves

February 29, 2012

Bill Marsh, Kiyomi Seiya, Dean Still, Kent Triplet Alex Waller

Aperture scan

Orbit smooth

Alignment and Move

1, Take Position and Dipole current data with ACL scriptB: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.

Aperture scan and offline analysis(1)

with correctionsw/o corrections

Aperture scan and offline analysis(2)

New W75 is able to do analysis with the corrections.

Horizontal positions from scan

Horizontal aperture-25/+30 mm @ SHORT-15/+15 mm @LONG

Vertical positions from scan

Vertical aperture-7/+7mm @ SHORT-7/+12mm @LONG

bx @short = 33.7 bx @long = 6.1

by @short = 5.3 by @short = 20.4

H_emittance(95%) = 14p mmmradV_emittance(95%) = 16p mmmrad +/-21.5 mm

+/-1

7.9m

m

+/-9.12 mm+/

-9.1

5mm

@ SHORT @ LONG

H/V beam size at short and long

-10

-5

0

5

10

0 5 10 15 20 25

Horizontal long (HL)sperture center

original beam positionafter orbit smooth

beam

pos

ition

[mm

]

period

-6

-4

-2

0

2

4

6

0 5 10 15 20 25

Vertical long (VL)

VL_ap_center_wo_offbpm wo off before swo off - after

beam

pos

ition

[mm

]

period

-6

-4

-2

0

2

4

6

0 5 10 15 20 25

Vertical short (VS)

VS_ap_center_wo_offbpm wo off before swo off - after

beam

pos

ition

[mm

]period

-10

-5

0

5

10

0 5 10 15 20 25

Horizontal short (HS)HS_ap_center_wo_offbpm-h_wo_offbpm-H_wo_off-after

beam

pos

ition

[mm

]

period

Orbit smooth with B80

Desired position

Before smooth

After smooth

Intensity and beam loss after smoothAfter smoothBefore smooth

Corrector current after smooth

VerticalHorizontal

Aperture scanFinished 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 smoothMoved 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.

Aperture restriction at short 14

Aperture scan with 3 bump + 5 bump

F D RF

Corrector+

BPM

Scan @ SHORT

Scan @ LONG

notcherV pinger

Ext. kicker

Col.6 ACol. 6B

Col. 7A

Ext. kicker BRF#2BRF#1

BRF#4BRF#3

BRF#6BRF#5

BRF#8BRF#7

BRF#19

BRF#9BRF#10

BRF#12BRF#11

BRF#14BRF#13

BRF#18BRF#17

BRF#16BRF#15

Components restricted aperture

V pingernocker

41.6

6mm

114.3mm

Short section with correctors

57.1

7mm

63.25mm

56.8

5mm

L2 (4 x ext. kickers)L12 (old H pinger, nocker, V pinger, ext. kicker)

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

Charge 0 (Intensity) bpm MAP (mm) center (mm)

Ver

(mm

)

Hor (mm)

0.000

12.82

25.64

38.46

51.28

64.10

76.92

89.74

recalc long 12 b40 removed

chg0

Aperture @ L12 & L11

57.1

7mm

63.25mm

L5 with H pinger and notcher

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

Charge 0 (Intensity) bpm MAP (mm) center (mm)

Ver

(mm

)

Hor (mm)

0.000

12.82

25.64

38.46

51.28

64.10

76.92

89.74

recalc long 5 b40 removed

chg0

Aperture @ L5

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

Ver

(mm

)

Hor (mm)

0.000

12.82

25.64

38.46

51.28

64.10

76.92

89.74

recalc long 6 with B40 offset removed

chg0

ver bpm ver center

57.1

7mm

76.2

mm

L6 and L7 with collimators

L66A 6BShielding Shielding

6A CollimatorUpstream Bellows

> 1 inch

57.17mm

57.1

7mm

L14 – L24 with RF cavities

Radiation survey at L14 -24

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

0 1 2 3 4 5

del_X[m] Y[m]

del_

X[m

] Y[m]

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

5 6 7 8 9 10

del_X[m] Y[m]

del_

X[m

] Y[m]

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

10 11 12 13 14 15

del_X[m] Y[m]

del_

X[m

] Y[m]

-0.005

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

15 16 17 18 19 20

del_X[m] Y[m]

del_

X[m

] Y[m]

L14 L15 L16 L17 L18

L19 L21 L22 L23 L24

BRF19

BRF18

RF cavity alignment error in H & V5mm

-30 -20 -10 0 10 20 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

-30 -20 -10 0 10 20 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

-30 -20 -10 0 10 20 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

Charge 0 (Intensity) bpm MAP (mm) center (mm)

Ver

(mm

)

0.000

12.82

25.64

38.46

51.28

64.10

76.92

89.74

recalc long 19

chg0

hor bpm (mm)

Beam position at L19

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

0 5 10 15 20 25

D-UF-UF-DD-D

heig

ht[m

]

cell #

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

5 6 7 8 9 10

[m]

period

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

10 11 12 13 14 15

[m]

period

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

15 16 17 18 19 20

[m]

period

221.41

221.415

221.42

221.425

221.43

221.435

221.44

221.445

221.45

20 21 22 23 24 25

[m]

period

Vertical alignment error on F & D magnets5mm

Future plans

1. Align BRF#19, #18 and 17

2. Align Pinger and Notcher at L5

3. Align Ext. kickers, pinger and nocker at L2 & L12

4. Orbit smooth with B80 from injection to flattop and remove the momentum offset in the correctors.

5. Review beam positions at the collimators.

6. Move magnet @ period 15