Beams Division Seminar

Configuration Management inthe Tevatron – Alignment

Ray Stefanski

March 6, 2003

Configuration Management

CM focuses on controlling outcomes.

CM controls change, making sure that its impact is assessed and that every effort is made to prevent erosion of functionality or safety.

Applies to any complex system, but we willconcentrate today on Tevatron magnet alignment and stability.

Organization

I would like to discuss alignment roughly alongchronological lines, beginning last Summer when Ifirst got involved. Our baseline dates to 1995.We will cover:

1. Data base development.2. Elevations.3. Roll measurements.4. Continuous elevation monitors.5. Smart Bolt measurements.6. Summary

Contributors:

Bruce HannaJim VolkBob BernsteinTerry SagerGeorge WojcikAMGChuck BrownMike ChurchAndrey ChupyraVladimir Shiltsev

Mike SyphersMCRDave AugustineMechanical TechsDon EdwardsTodd JohnsonDuane PlantJim WilliamsDave HardingBruce BrownJohn CarsonJamie BlowersRay Hanft

Hans JostleinCrag MooreAimin XiaoJean SlaughterDave RitchieNorm Gelfand

1995Quad Elevations

40.25

40.35

40.45

40.55

40.65

40.75

40.85

0 1000 2000 3000 4000 5000 6000 7000

L (M)

Elev

atio

n (in

ches

)

Dipole Elevations 05/00

40.250

40.350

40.450

40.550

40.650

40.750

40.850

0 1000 2000 3000 4000 5000 6000 7000

Z (m)

Elev

atio

n (in

ces)

Quad Elevations from GW

Mike Syphers

Murphy Line

Distance between station* and Murphy Plug

22.4364

22.4366

22.4368

22.437

22.4372

22.4374

22.4376

22.4378

0 50 100 150 200 250

Murphy Plug #

(in)

Murphy Plugs in Lab Coordinates

-1500

-1000

-500

0

500

1000

1500

-2500 -2000 -1500 -1000 -500 0 500

X (m)

Y (m

)

Configuration of Tevatron

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0 50 100 150 200

Murphy Plug #

Diff

eren

ce (i

n)

DX_cal

DY_cal

DX_cal_f

DY_cal_f

Computer worksThe Murphy-line differs from the “ideal.”At each station, the difference is about 10 mils.The accumulated beam-offset after one sector is >250 mils.We might take this seriously, if we knew where the Murphy-line was.

BD Development

• We’re working on a PC RIM DB for magneticfield data. We would like to combine this withAlignment data in the same DB.

• We want to monitor corrector magnet settingsmore closely to follow changes as they occurfrom store to store. Use of SDA.

D-Sector Elevations

40.35

40.40

40.45

40.50

40.55

40.60

40.65

3000 3250 3500 3750 4000

Z(m)

Elev

atio

n (in

)

Elevations

A-Sector

40.55

40.60

40.65

40.70

40.75

40.80

40.85

0 200 400 600 800 1000 1200

Z (m)

Elev

atio

n (in

ch)

E Sector

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

40.95

4,300 4,500 4,700 4,900Z (m)

Elev

atio

n (in

ch)

B Sector

40.20

40.30

40.40

40.50

40.60

40.70

40.80

40.90

1,100 1,300 1,500 1,700 1,900Z(m)

elev

atio

n (in

ches

)

A1 under repair today.A14-1 may be an example.

The Tevatron now has a vertical network, tied to the Lab coordinates.

B-sector with more data

B Sector

40.20

40.30

40.40

40.50

40.60

40.70

40.80

40.90

1,100 1,300 1,500 1,700 1,900Z(m)

elev

atio

n (in

ches

)

B14-1B15-1B16-1B16-2B16-3B16-4B16-5B17-1B17-4B17-5B18-1B18-2B18-3B18-4B18-5B19-1B19-2B19-3B19-4B19-5B21-1B36-1B37-1B38-1all quadsB15-2B15-3B15-4B21-2B21-3B21-4B22-1B22-2B22-3B22-4B22-5B23-1B23-2B23-3B23-4B23-5B24-1B24-2B24-3B24-4B24-5B25-1B25-2B25-3B25-4B25-5B26-1B27-1B28-1

B15-1B16-1

B17-1

Some history of B16-1 and its neighbors.

Elevation of B16-1 is 40.76” measured on 11/19/02.

• Memo dated 05/24/99 Mike Church to Alignment Group:

• Elevation of B-16-1 increased from 40.387”to 40.443” on 05/25/99.

• Elevation of B-16-1 increasedto 40.541” on 03/15/00.US of D-15-5 changed to 40.517”.

location vertical change daterequested from completed5/24/99 as-found

b11(low beta Q!) 0b12(low beta Q5) 0B13-1 0B14-1 +.060" 05.25.99B15-1 +.060" 05.25.99B16-1 +.060" 05.25.99B17-1 0B18-1 -.060" 05.25.99B19-1 -.060" 05.25.99B21-1 -.040" 05.25.99B22-1 -.040" 05.25.99B23-1 -.040" 05.25.99B24-1 0B25-1 0

Thanks to Terry Sager.

Aperture Scan looks ok!

Typical Tev apertures:Quad 3 inchDipole 2.7 inchC0 lambs ~1 inchB16-1 = 1.36 inch

Thanks to Dan Bollinger and Todd Johnson.

Aperture Scan 01/07/03

A14-1 Quad

A14-2 Dipole

Spool to Dipole

Quad to Spool

Spool

Example of mismatch in elevation.

Quad to Spool toDipole interface.

Survey and realignment in this area is presently taking place.

CHAURIZE, SALAH J. 03/05/2003

Elevation Data at A0 and A1

A0 to A1

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

100 150 200 250 300

Z (m)

Elev

atio

n (in

ch)

A15-2

A15-3

A15-4

A15-5

All Quads

A16-1

A18-1

A18-2

A18-3

A18-4

A18-5

We really have insufficient data on elevations. We may be missing some important discrepancies.

Results of the Level Run

B-sector elevation correctionsB-Sector Elevations

40.2540.3040.3540.4040.4540.5040.5540.6040.6540.7040.7540.80

1100 1350 1600 1850Z (m)

Ele3

vatio

ns (i

nch)

ElevationsCorrected Elevations1995 Quad Elevations

Shift is 17.5 mils

E-sector elevation corrections

E-Sector Elevations

R2 = 0.1067

40.50

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

4300 4500 4700 4900

Z (m)

Elev

atio

n (in

ch)

Elevations

Corrected Elevations

1995 quad elevations

Trendline - 1995 quadelevations.

E28-2

E17-1 E34-5

Shift is –39.4 mils

953 more to go!

Talyvel Clinometer

Comparison with Survey Data

0

1

2

3

4

5

6

7

8

9

10

-1 -0.8

-0.6

-0.4

-0.2 0 0.2 0.4 0.6 0.8 1

Difference in mrad

Fixture vs Jun 02 dataFixture vs Jan 03 data

Comparison with Survey Data

-6

-4

-2

0

2

4

6

8

10

250 300 350 400 450 500

Z (m)

Roll

(mra

d) 01-Jan-03 (Hans)14-Jun-02 (fixture)24-Jan-03 (elevations)

-1.813.02

1.784-1.522

outliers

A Jun 2002 -0.0263 0.2063A Dec 2002 0.0181 0.1300

A19 to A 26

Sector Date Ave. Standard Diff. Deviation

A Nov 2001 -0.2000 0.1537 A Jun 2002 -0.0263 0.2063 A Dec 2002 0.0181 0.1300

B May 2000 -0.3162 0.1140 B Nov 2001 -0.0326 0.0843 B Dec 2002 0.0264 0.0682

C Nov 2001 -0.2245 0.0864

D May 2000 -0.3167 0.1211 D Nov2001 -0.2337 0.1039 D Feb 2003 0.0890 0.1275

E Nov 2001 -0.3459 0.1912 E Dec 2003 0.0759 0.1068

F Nov 2001 -0.3331 0.0704

Some outliers

Comprehensive Comparisonwith Survey

Roll vs Corrector

-0.20

-0.10

0.00

0.10

0.20

-4 -2 0 2 4 6 8 10

Roll

Cor

rect

or a

ngle

Horizontal Correctors vs Roll

-0.20

-0.10

0.00

0.10

0.20

-4 -2 0 2 4 6 8 10

Roll (mrad)

MFG

(mra

d)

Correlation – Roll vs MFG

Quads with Large Rolls9-Nov 14-Jun 19-Nov2001 2002 2002

Hans Shim survey surveyFxtre milsmpilation 2003

A15-1 4.18 60 1.28 4.19A16-1 2.75 0 2.75A23-1 2.16 0 4.12 2.41A24-1 2.44 0 3.62 2.98A25-1 3.80 60 2.53 3.68

C24-1 3.04

D46-1 2.17 0 -0.03 none

E32-1 2.97 0 4.91 noneE39-1 2.56 0 4.06 noneE43-1 2.59 0 2.09 none

Many of the Yr 2000 results were corrected. Corrected data will be

The acceptable limit is 3.0 mrad.

Magnets with twistGreater than 1 mrad.Twist

Magnet Twist

-5

-4

-3

-2

-1

0

1

2

3

0 1000 2000 3000 4000 5000 6000

Z (m)

Twis

ts (m

rad)

A21-3 2.97A21-4 1.18A29-4 1.14B13-2 -1.03B15-3 1.64B16-5 1.15B37-2 2.13C10-4 -2.11C14-5 1.03C15-2 -1.25C16-2 -1.21C17-5 -1.01C24-2 -1.17C47-1 -1.11D16-1 1.13E19-2 1.41E26-1 1.01E26-3 -1.16E28-4 -4.63E29-5 1.98F12-4 -1.2

-4

-2

0

2

4

6

8

10

0 1000 2000 3000 4000 5000 6000 7000Z (m)

Rol

l (m

rad) MR Dipoles Removed

Dipooles PresentAll TeV Magnets

Effect of MR Magnet Removal

MR not MRRe move d Re move dmrad mrad

504 445

0.576 0.613

0.013 0.010

Total Te V magne ts

Me an

Standard De viation

Status of Nearby Directly Above and Main Ring Magnets Above on Either Side Removed 13(61.9%) 38(64.4%) Remaining 8(38.1%) 21(35.6%)

Roll:

Twist:

Pockets of InterestMagnets with twistGreater than 1 mrad.

A21-3 2.97A21-4 1.18A29-4 1.14B13-2 -1.03B15-3 1.64B16-5 1.15B37-2 2.13C10-4 -2.11C14-5 1.03C15-2 -1.25C16-2 -1.21C17-5 -1.01C24-2 -1.17C47-1 -1.11D16-1 1.13E19-2 1.41E26-1 1.01E26-3 -1.16E28-4 -4.63E29-5 1.98F12-4 -1.2

Location Roll (mrad)A15-1 4.176279A15-4 5.689188A18-3 4.100939A19-2 6.638064A21-2 7.931061A21-3 6.858994A214 4.875719A22-5 4.131482A23-3 3.835213A23-5 4.634428A24-5 3.668243A25-1 3.803651B16-1 Poor elevationB22-3 4.311687 3 SHIM RIB22-4 3.249801 3 SHIM RIB25-2 3.957386 3 SHIM RIC15-4 4.827868 3 SHIM RIC24-1 3.04007 3 SHIM RID46-4 5.31656 REPEAT WITH 1/8 INCH S

Number oSector Magnets

Measured>1 >2 >3 >4 >5 >6 >7 in sector.

A 42 24 12 9 4 3 1 163

B 41 16 3 1 161

C 14 4 2 1 154

D 16 5 1 1 1 156

E 47 18 163

F 6 156

Total > N 166 67 18 12 5 3 1 953

Roll Angle > N mrad

No. ofSector Magnets

Measured>1 >2 >3 >4 >5 >6 >7 in sector.

A 25.3% 35.8% 66.7% 75.0% 80.0% 100.0% 100.0% 163

B 24.7% 23.9% 16.7% 8.3% 161

C 8.4% 6.0% 11.1% 8.3% 154

D 9.6% 7.5% 5.6% 8.3% 20.0% 156

E 28.3% 26.9% 0.0% 0.0% 163

F 3.6% 0.0% 0.0% 0.0% 156

17.4% 7.0% 1.9% 1.3% 0.5% 0.3% 0.1% 1166 67 18 12 5 3 1 953

Roll Angle > N mrad

17.4% have rolls> 1 mrad.

Distribution of larger rolls in the

Tevatron.

Level Meters in the

Tevatron

Duane Plant,Todd Johnson,Jim Volk,Andrey Chupyra.

Continuous relative elevation monitor.

A16-3&4 water level differnence

120.0

122.0

124.0

126.0

128.0

130.0

132.0

134.0

136.0

138.0

140.0

2/11/03 0:00 2/12/03 0:00 2/13/03 0:00 2/14/03 0:00 2/15/03 0:00 2/16/03 0:00 2/17/03 0:00 2/18/03 0:00

date

mic

rom

eter

s store 2213

Store 2229

Store 2231

Store 2232

Jim VolkA16-3 and A16-4 WLM

A-Sector

Quench

E-Sector

B-Sector

Some recent history from Todd Johnson’s Tilt Meters.

Have the Tev magnet coils moved in the ensuing years?

We measure significant differences in roll betweenthe us and ds ends of many magnets. The alignment lugs were originally set to account for any magnet twist:Both ends of the magnet should have the same roll.Twist may be induced by 4-point stands.

There are several things we can do:a. Measure smart bolt settings (will be done tomorrow

on a select set of magnets in the tunnel).b. Use the Kaiser coil to check for magnet coil alignment.c. There are about 24 magnets in storage that could be

put on a stand and checked.

Coupling in the Tevatron

Tev Magnet cross section

Quadrant 2 Cold Lift Differences

-0.015

-0.010

-0.005

0.000

0.005

0.010

0.015

0.020

1 2 3 4 5 6 7 8 9

Support Number

DIff

eren

ce (i

n)

TC0527TB0277TB0299TB0338TB0328TC0468TB0365TB0351TB1122TB0596TC0488TC0531TB0862TC1218TC0816TC1059TC0788TC1149

Dipole Smart Bolt Measurements

-0.020-0.015-0.010-0.0050.0000.0050.0100.0150.0200.0250.0300.035

1 11 21 31 41 51 61 71 81 91 101

111

121

131

141

151

161

Magnet

Mils Quadrant 1

Quadrant 2

Measurements taken on 2/1982 and 2/18/2003.

Dave Harding, John Carlson,Jamie Blowers,And many others.

Smart Bolt Survey in Tevatron

Would induce oneUnit of a1.

Coupling Study @ 150 GeV

• Beam mis-steered in P1 line• T:SQ global skew quad circuit at 0 amps• Look at betatron oscillation coupling between horz & vert• Below are ~ 4 turns of data; 1st turn on left; scale limits ± 4mm

Horizontal

VerticalRon Moore

This is where we need to get creative.

How do we manage the baseline configuration?

• We need to measure magnet positions often, at least once per year.To follow changes as they take place, we should monitor what

magnets are doing over time.Keep track of changes in corrector magnet currents.The tilt monitors give a measure of short term changes:

We need a cheap way to put 1,000 of these in the ring.Hans Jostlein has come up with a quick roll measuring device:

We hope to be able to do the entire ring in 2-3 days.In a similar vein, we’ll need some way to quickly

measure elevation. Horizontal position checks would be useful also.

Summary

• A BD is being developed for Tevatron magnets to includemagnetic fields and alignment data.

• We need to complete elevation measurements.A14-1 was a revelation.

• A horizontal survey network is in the design stage.• A continuous position monitoring system is being developed.• What can we say about twist.• We may want to realign shims within the iron yoke magnets.