Looking at Horizontal Main Injector proton emittances at 8 and 150 GeV in 

recent stores 

Vaia Papadimitriou

April 1, 2009

Stores 6850‐6944 (Mar. 1‐Mar. 30, 2009)

store number

Intensities

9000

9500

10000

10500

11000

11500

12000

12500

13000

13500

14000

14500

15000

6840 6850 6860 6870 6880 6890 6900 6910 6920 6930 6940 6950

# 47 p at MI,  8 GeV (1E09)

# 48 p at MI,  150 GeV after coal. (1E09)

# 49 SBD p at Tev injection (1E09)

Stores 6850‐6944 (Mar. 1‐Mar. 30, 2009)

store number

Emittances

9

10

11

12

13

14

15

16

17

18

19

20

21

6840 6850 6860 6870 6880 6890 6900 6910 6920 6930 6940 6950

# 75 p H emitt,  MI 8 GeV (pi‐mm‐mrad)

# 76 p H emitt,  MI 150 GeV (pi‐mm‐mrad)

# 77 p H emitt Tev 150,  before ramp (pi‐mm‐mrad)

Stores 6850‐6944 (Mar. 1‐Mar. 30, 2009)

store number

Hor. Brightness(Intensity/Emittance)

500

550

600

650

700

750

800

850

900

950

1000

6840 6850 6860 6870 6880 6890 6900 6910 6920 6930 6940 6950

H brightness, MI 8 GeV

H brightness, MI 150 GeV

H brightness, TeV 150 GeV

Stores 6850‐6944 (Mar. 1‐Mar. 30, 2009)

store number

Long. Emittances

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

4

6840 6850 6860 6870 6880 6890 6900 6910 6920 6930 6940 6950

# 200 Alt. P Longitudinal Emittance MI 8 GeV

# 204 Alt. P Longitudinal Emittance MI 150 GeV

In the next pages we look at horizontal emittances as well as centroids, sigmas, amplitudes and χ’s of the Flying Wire profile fits at Main Injector 8 and 150 GeV, comparing performance in mid February and late March. 

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHIP02[72]

I:WHIP02[73]

I:WHIP04[108]

I:WHIP04[109]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)amplitude of fit

(1st pass expectedto have bigger amp.)

8 GeV

Transfer number (18 per store with two bunches each)

6829Why 1st and 2nd bunch have systematicallydifferent amplitudes?

Is the integrator reset to 0before the 2nd bunch?J. Zagel will check.

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0 18 36 54 72 90 108 126 144

I:WHIP02[72]

I:WHIP02[73]

I:WHIP04[108]

I:WHIP04[109]

Stores 6931‐6944 (Mar. 26‐Mar. 30, 2009)

amplitude of fit

(1st pass expectedto have bigger amp.)

8 GeV

Transfer number (18 per store with two bunches each)

6944

After the integrator hold time was reducedfrom 200 ns to 100 ns.Significantly smaller difference now between1st and 2nd batch. Both amplitudes are now small though.

13

13.5

14

14.5

15

15.5

16

16.5

17

17.5

18

18.5

19

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHEP02[144]

I:WHEP02[145]

I:WHEP04[216]

I:WHEP04[217]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)

Transfer number (18 per store with two bunches each)

Emittances8 GeV

02 is 1st pass04 is 2nd pass

6829

Bigger emitt. difference between 1st and 2nd pass

13

13.5

14

14.5

15

15.5

16

16.5

17

17.5

18

18.5

19

19.5

20

0 18 36 54 72 90 108 126 144

I:WHEP02[144]

I:WHEP02[145]

I:WHEP04[216]

I:WHEP04[217]

Stores 6931‐6944 (Mar. 26‐Mar. 30, 2009)

Transfer number (18 per store with two bunches each)

Emittances8 GeV

02 is 1st pass04 is 2nd pass

6944

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

4

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHSP02[72]

I:WHSP02[73]

I:WHSP04[108]

I:WHSP04[109]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)Sigmas of fit

8 GeV

Transfer number (18 per store with two bunches each)

6829

3.4

3.5

3.6

3.7

3.8

3.9

4

4.1

4.2

4.3

0 18 36 54 72 90 108 126 144

I:WHSP02[72]

I:WHSP02[73]

I:WHSP04[108]

I:WHSP04[109]

Stores 6931‐6944 (Mar. 26‐Mar. 30, 2009)

Sigmas of fit8 GeV

Transfer number (18 per store with two bunches each)

6944

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)Centroids

8 GeV

‐3

‐2.5

‐2

‐1.5

‐1

‐0.5

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHCP02[72]

I:WHCP02[73]

I:WHCP04[108]

I:WHCP04[109]

Transfer number (18 per store with two bunches each)

6829

02 is 1st pass04 is 2nd passBigger difference in centroids between 1st and 2nd pass.

Why the flipping between 1st and 2nd pass?(Not always correlated with odd or even number of corrresponding pbar transfers)

‐3

‐2.5

‐2

‐1.5

‐1

‐0.5

0 18 36 54 72 90 108 126 144

I:WHCP02[72]

I:WHCP02[73]

I:WHCP04[108]

I:WHCP04[109]

Stores 6931‐6944 (Mar. 26‐Mar. 30, 2009)

Centroids8 GeV

Transfer number (18 per store with two bunches each)

6944

02 is 1st pass04 is 2nd pass

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHFP02[72]

I:WHFP02[73]

I:WHFP04[108]

I:WHFP04[109]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)χ2’s of fit8 GeV

Transfer number (18 per store with two bunches each)

6829

The χ2’s are quitedifferent for the 1st and 2nd bunch/batch.

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0 18 36 54 72 90 108 126 144

I:WHFP02[72]

I:WHFP02[73]

I:WHFP04[108]

I:WHFP04[109]

Stores 6931‐6944 (Mar. 26‐Mar. 30, 2009)

χ2’s of fit8 GeV

Transfer number (18 per store with two bunches each)

6944

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHIP03[146]

I:WHIP03[147]

I:WHIP05[182]

I:WHIP05[183]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)amplitude of fit

(1st pass expectedto have bigger amp)

150 GeV

Transfer number (18 per store with two bunches each)

6829 Why 1st and 2nd bunch have systematicallydifferent amplitudes?

Is the integrator reset to 0before the 2nd bunch?

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

0 20 40 60 80 100 120 140

I:WHIP03[146]

I:WHIP03[147]

I:WHIP05[182]

I:WHIP05[183]

Stores 6931‐6944 (Mar. 1‐Mar. 30, 2009)

amplitude of fit

(1st pass expectedto have bigger amp)

150 GeV

Transfer number (18 per store with two bunches each)

6944

13

13.5

14

14.5

15

15.5

16

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHEP03[290]

I:WHEP03[291]

I:WHEP05[362]

I:WHEP05[363]

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)Emittances150 GeV

03 is 1st pass05 is 2nd pass

Transfer number (18 per store with two bunches each)

6829

12

12.5

13

13.5

14

14.5

15

15.5

16

16.5

17

17.5

18

0 18 36 54 72 90 108 126 144

I:WHEP03[290]

I:WHEP03[291]

I:WHEP05[362]

I:WHEP05[363]

Stores 6931‐6944 (Mar. 1‐Mar. 30, 2009)Emittances150 GeV

03 is 1st pass05 is 2nd pass

Transfer number (18 per store with two bunches each)

6944

Stores 6792‐6829 (Feb. 10‐Feb. 23, 2009)Centroids

150 GeV

‐1.4

‐1.3

‐1.2

‐1.1

‐1

0 18 36 54 72 90 108 126 144 162 180 198 216

I:WHCP03[146]

I:WHCP03[147]

I:WHCP05[182]

I:WHCP05[183]

Transfer number (18 per store with two bunches each)

6829

No difference here between 1st and 2nd pass

‐1.28

‐1.26

‐1.24

‐1.22

‐1.2

‐1.18

‐1.16

‐1.14

‐1.12

‐1.1

‐1.08

0 18 36 54 72 90 108 126 144

I:WHCP03[146]

I:WHCP03[147]

I:WHCP05[182]

I:WHCP05[183]

Stores 6931‐6944(Mar. 1‐Mar. 30, 2009)Centroids

150 GeV

Transfer number (18 per store with two bunches each)

6944

No difference here between 1st and 2nd pass

Conclusions

The fit amplitudes which were significantly different between the 1st and 2nd proton batch at both 8 and 150 GeV are much closer after the integrator hold time reduction on March 3 and additional adjustments on March 20th. The amplitudes are much smaller now though than they used to be.

The sigmas, emittances and centroids have been exhibiting similar differences between the 1st and 2nd

batch in the February and March comparisons. The χ2

differences at 8 GeV for the fits of the 1st and 2nd batch have been now improved.