CC focuses on controlling outcomes.

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

Configuration Control

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

Tevatron Alignment Task Force

Members We Report to: Roger Dixon

Final Decision Approval: Mike Church; Vladimir Shiltsev

Task Force Leader: Ray Stefanski

Representing Division Management: John Cooper; Bob Kephart

Run II Project Leader Jeff Spalding

Beam Physics Department: Mike Syphers

CDF & Dzero Rob Roser Rich Smith

AMG Bob Bernstein; Terry Sager; George Wojcik

The Important People Norm Gelfand; Jesse Guerra; Bruce Hanna; Todd Johnson; Mike McGee; Fred Nobrega; Duane Plant; John Tompkins; Jim Volk; Aimin Xiao

Consultants Gerry Annala ; Don Edwards; Dave Finley; Hans Jostlein; Craig Moore; Jean Slaughter; Alvin Tollestrup;

Outside Consultants Andrei Seryi --- SLAC Andrey Chupyra – BINP

Goals for today’s meeting: Establish subgroups for the 4 main activities. Develop an action plan, so that we can

measure our progress for each subgroup.

Dear Ray,

To help resolve the alignment issues that exist in the Tevatron during the past year, I would like you to lead an alignment task force for the Tevatron.  (1) The charge of your task force with be to identify and document potential misalignments of the Tevatron dipoles, quadrupoles and other accelerator components installed in the Tevatron tunnel.  (2) In

addition, your task force is asked to assess the impact of such misalignments and present plans for correcting them to the Tevatron Department Head.  (3) You are also asked to develop plans for improved

methods for measuring, monitoring, and maintaining the Tevatron alignment parameters.   The Tevatron alignment task force will report to me.  Nevertheless all plans must be approved by the Tevatron Department Head before they are implemented.

Roger

Charge from Roger

1. Identify and document potential misalignments of the Tevatron dipoles, quadrupoles, and other accelerator components installed in the Tevatron tunnel.  (Roll, elevation, horizontal offset, and movement of cryostat relative to the yoke. Can be written today.)

2. Assess the impact of such misalignments and present plans for correcting them to the Tevatron Department Head.   (The effect ofa1 component is well understood. The effect of rolls have beencalculated. Elevation misalignment is too large for corrector magnets.Horizontal offsets were sampled during F0 and C0 construction.)

3. Develop plans for improved methods for measuring, monitoring, and maintaining the Tevatron alignment parameters. (1. Motion detectors provide information regarding short term movement ofmagnets; 2. Rapid survey takes place once a year during extendedmaintenance period; 3. Every two years, measure tie rods and alignment plugs relative to the site wide network.)

4. Data Handling: Important for any of these issues.

Charge (Quick Summary of Status)

Test Stand at IB1.Quad and turn-around box mounted.

Test Stand at MP8. Spool is being installed.

Test Stands

At IB1, to study stresses andother effects due to magnetin situ rotation.

At MP8, to study fixtures, motiondetectors, and survey techniquesfor Tev magnets. This will be a string of 4 dipoles, a quad, and a spool.

Charge (Smart Bolt Adjustments)

Mike Church:Readjusting the smart/dumb bolts will depend on, among other things. 

a)  What integrated luminosity do we expect to gain from this operation?  b)  What other shutdown activities have higher priority? (None!)  c)  How much Tevatron retuning will be necessary after this operation?   d) What is the risk of breaking a magnet and having to replace it? (Must be careful!) 

Physics questions: Will the reduction in local coupling improve: 1. the 150 GeV lifetime for protons? 2. the losses at the beginning of the ramp? 3. the transfer efficiency? 4. the emittance blowup on transfer? 5. or reduce the long-range beam-beam effect? 6. effect the time dependent skew quad correction and snap back at 150 GeV? 7. improve the luminosity lifetime? 8. improve beam stability, or make it worse?

Other questions: 1) Will the reduction in local coupling make it easier (quicker) to tune the Tevatron to the desired operating point? 2) Will the reduction in local coupling make it easier to use the transverse dampers?

David Harding:http://tdserver1.fnal.gov/tev-magnets/SmartBolts/TunnelReshimming20030527.doc

 

Suggestion for Review of Smart Bolt Issues

a)    Mike Syphers on physics motivation (an attempt to address the eight physics questions from M.Church.) b)    Dave Harding on how we will do all that, procedures, estimates, etc. (basically, he has all written up already) c)    Ray Stefanski - first look into risk analysis (you have to be prepared - talk to people first, understand concerns, and possibilities to screw things up... plus what it will cost us). d)    general discussion, followed by separate meeting of the committee of which should conclude in 1/2 page writeup on recommendations with pros and cons. Allocate 15 min for a), 15 min for b), 20 min for c) and 40 min for d)

I’m not certain we’re ready for a review of this kind.Mike is working on the issues, and a possible scheme to deal with

the skew quad component.TD has measurements and tests to complete. What happens to the field

when the cryostat is elevated? Is the change repeatable frommagnet to magnet?

1. About 69 stands will be available for the summer shutdown. These areThese are a standard stand design with made of carbon steel, with annickel coating.

2. Mike May has an upgraded stand designed. Will not be installedIn the summer shutdown. Mike will tell us about it at next Monday’smeeting (Why not install sooner??)

3. Magnet elevation off floor has been measured for about 60% of the ring.

4. Quad Stands may need more rigidity. MM analysis gives natural frequency less than 100Hz! Can we measure this with ourmotion detectors?

Charge (Magnet Stand Replacement)

• six week shutdown gives us 22 working days (7 weeks)• replace one dipole every 4 hours• 44 dipoles per crew.• 88 magnets can be done.• Plan to use 2 crews.• 19 stands on hand, 50 on order.• Replace A & E Sector stands.• Ring will be at LiN2 temperature?• We are making one.• Changes to stand are only material changes:

• More changes:

1.      Elctro-less nickel plating will be used.2.      Base-plate will be made of stainless steel.3.      Larry Sauer, Chris Anderson consulted on this.4.      Mike May is working on a next generation design.5.      The 19 we have will be plated before the shutdown.

Status of Magnet Stand Replacements

1. Except base-plate is wider.2. Special fixture will be built to take weight off existing magnet3. Dial indicators will be used to monitor magnet movement.4. How do we make certain that magnet doesn’t move radialy?? Bolts in back

are spring loaded, so they could push the magnet radially.

Mike May will propose anew design for the future.

Dipole Stand Replacement Fixture

Tevatron Stand Replacement Fixture Assembly

MM estimate of quad frequency

Natural Frequency of Tevatron QuadsMichael McGee 30-May-03

Var Value Unitd 0.75 in Support Diameter (3/4"-10 Threaded Rod)L 5.25 in *Support LengthA 0.441786467 in^2 Support Cross-sectional AreaE 29000000 lb/in^2 Modulus of Elasticity for Steelk1 2440344.293 lb/in Stiffness per supportgc 386.4 in*lbm/(lb*sec) Acceleration due to gravityI 1225 in^4 Moment of Inertia of Quad Magnet CorekLP 1.7052E+12 lb*in^2 Magnet Stiffness per unit length*Length of support was based on worst case at A-1

Between SupportsSupport Magnet Steel Supports and Magnet Steel Only

Device Length (in) Length (in) Stiffness (lb/in) Eq Stiffness (lb/in) Weight (lb) Freq (Rad/sec) Freq (Hz) Freq (Hz)TQ 32 32 19.2 240919325.1 2415873.187 1150 900.9624803 143.3926 288.2340721TQ 66 66 39.6 27459319.24 2241168.799 2244 621.2185512 98.87 206.3397078TQ 82 82 49.2 14317922.77 2084980.565 2750 541.2566154 86.14367 186.392267TQ 99 99 59.4 8136094.59 1877273.837 3250 472.4335071 75.19013 171.4559484

Upstream Tevatron Dipole Stand Assembly

US Dipole Magnet Stand Design

DS Dipole Magnet Stand Design

Downstream Tevatron Dipole Stand Assembly

Rolls vs Z

-4

-2

0

2

4

6

8

10

0 1000 2000 3000 4000 5000 6000

Z (m)

Ro

ll (

mra

d)

c

Roll Distribution Around the Ring

Twist – This was Once a Dance

Magnet Twist

-5

-4

-3

-2

-1

0

1

2

3

0 1000 2000 3000 4000 5000 6000

Z (m)

Tw

ists

(m

rad

)

Tevatron level

40.3

40.4

40.5

40.6

40.7

40.8

0 1000 2000 3000 4000 5000 6000

Z (m)

Le

ve

l (i

n)

Fit All Fit Part V. AVR.

Elevation Baseline

A-Sector

40.50

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

0 200 400 600 800 1000 1200 1400

Z (m)

Ele

va

tio

n (

inc

h)

A15-2A15-3A15-4A15-5A21-5A22-1A22-2A22-3A22-4A22-5All Quads A16-1A18-1A18-2A18-3A18-4A18-5Ideal Orbitideal + 0.1A45-2A45-3A45-4A45-5A46-4

B-Sector Elevations

40.25

40.30

40.35

40.40

40.45

40.50

40.55

40.60

40.65

40.70

40.75

40.80

1100 1350 1600 1850

Z (m)

Ele

3v

ati

on

s (

inc

h) Elevations

Corrected Elevations

1995 Quad Elevations

Ideal Orbit

ideal+.01

ideal -0.1

Elevations compared to ideal orbit.

Elevations compared to ideal orbit.

E-Sector Elevations

40.50

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

4300 4500 4700 4900

Z (m)

Ele

va

tio

n (

inc

h)

Corrected Elevations

1995 quad elevations

Ideal Orbit

Ideal + 0.1

D-Sector Elevations

40.25

40.30

40.35

40.40

40.45

40.50

40.55

40.60

40.65

40.70

3000 3250 3500 3750 4000

Z(m)

Ele

va

tio

n (

in)

D22-3

D22-4

D22-5

D24-4

D24-5

D25-1

D32-4

D32-5

D33-1

D34-4

D34-5

D35-1

D35-2

D35-3

D36-3

D36-4

D36-5

D37-1

D46-1

D46-4

D47-1

quads

IdealOrbitideal +0.1ideal-0.1

Difference in Offsets from 1997 As-founds minus 1982 original Murphy Plug Geometry. Baseline used for comparison is E43.5 to F18.5

0.00

0.40

2.10

4.85

6.00

6.776.92

6.71

7.77

7.10

6.64

4.66

2.93

0.980.64

0.000.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

E43.5 E44.5 E45.5 E46.5 E47.5 E48.5o E48.5i F11.5 F12.5 F13.5 F14.5 F15.5 F16.5 F17.5o F17.5i F18.5

Murphy Plugs

Un

its

= m

mHorizontal Offsets near F0

1mm = 39.4 mils

Difference in Offsets from 1998 As-founds minus 1982 original Murphy Plug Geometry. Baseline used for comparison is B43.5 to C13.5

0.00

0.37

-0.61

-0.88

-0.98

-1.52

-1.22

-0.61

-0.09

0.00

-2.00

-1.50

-1.00

-0.50

0.00

0.50

B43.5 B44.5 B45.5 B46.5 B47.5 B48.5i B48.5o C11.5 C12.5 C13.5

Murphy Plugs

Un

its

= m

m

Horizontal Offsets near C0

1mm = 39.4 mils

Horizontal Displacement from Murphy Line

26.46

26.48

26.5

26.52

26.54

26.56

26.58

10 15 20 25 30 35 40 45 50

Cell Number

Dis

pla

ce

me

nt

(in

)-D

0=

26

.52

5

Sec. A

Sec. B

Sec. C

Sec. D

Sec. E

Sec. F

Horizontal Offsets - MAD

HVAC: Potential Site Riser

Air Inlet

Air Inlet

Air Duct

To bring the network into tunnel, we need to:1. Modify air vents top side.2. Build towers over the air ducts/risers.

This also needs deep rod system installed on site.

Rapid magnet survey techniques:

1. Develop rapid survey methods: AMG is doing this.We may not be able to get the surveyors needed to do this.

2. Develop elevation and horizontal offset fixture.Uses Murphy plugs for reference.Mike McGee, et al.

3. Improved roll measuring fixture.New fixture that will be easier to use.Interface directly to laptop, LabView.Fred Nobrega. et al

Hans with his roll measuring fixture!

We’re concerned that we will not beable to have all of the surveyors that weneed. We are developing methods thatcan be implemented with ordinary people.We will solicit help from the experiments,Other beams, and other labs, as appropriate.

Methods for “real time” motion detection.

Simple Construction

Elaborate Construction

1. Todd has tilt meters in the tunnel.2. HLS as in MI-8/ Aurora Mine.3. Modified HLS as in (2) but less expensive.4. Stretched wire techniques. (x, y measurement)5. Home made HLS. Could do the entire tunnel

Tevatron Tevatron Tunnel A-11-1 Magnet QF9007 Orignl A-1Tevatron Tevatron Tunnel A-11-1A Magnet TSH300 Orignl A-1Tevatron Tevatron Tunnel A-11-2 Magnet TB0689 Rplcd 9/29/1983 A-1 5.3125 1.875 2.0625 5Tevatron Tevatron Tunnel A-11-3 Magnet TB0934 Rplcd 9/28/1983 A-1 5.375 1.3125 2.0625 5.7875Tevatron Tevatron Tunnel A-11-4 Magnet TC0385 Rplcd 9/28/1983 A-1 5.4375 0.875 2.0625 5.7875Tevatron Tevatron Tunnel A-11-5 Magnet TB1092 Rplcd 5/23/1984 A-1 5.3125 0.875 2.0625 5.0625Tevatron Tevatron Tunnel A-12-1 Magnet QD2504 Rplcd 11/26/1983 A-1Tevatron Tevatron Tunnel A-12-1A Magnet TSD207 Rplcd 11/26/1983 A-1Tevatron Tevatron Tunnel A-12-2 Magnet TB1120 Rplcd 11/27/1983 A-1 5.4375 0.875 2.0625 5.625Tevatron Tevatron Tunnel A-12-3 Magnet TB0367 Orignl A-1 5.125 0.875 2.0625 5.25Tevatron Tevatron Tunnel A-12-4 Magnet TC0536 Orignl A-1 5.5625 1.3125 2.5625 5.5Tevatron Tevatron Tunnel A-12-5 Magnet TC0521 Orignl A-1 5.8125 1.3125 2.5625 5.125Tevatron Tevatron Tunnel A-13-1 Magnet QF59 Orignl A-1Tevatron Tevatron Tunnel A-13-1A Magnet TSC63 Orignl A-1Tevatron Tevatron Tunnel A-13-2 Magnet TC0783 Rplcd 5/14/1982 A-1 5.625 1.3125 2.5625 5.5Tevatron Tevatron Tunnel A-13-3 Magnet TC0411 Rplcd 4/21/1982 A-1 5.875 1.3125 2.0625 5.4375Tevatron Tevatron Tunnel A-13-4 Magnet TB0346 Orignl A-1 5.5 0.875 2.0625 5.875Tevatron Tevatron Tunnel A-13-5 Magnet TB0321 Orignl A-1 5.3125 1.3125 2.5625 5.875Tevatron Tevatron Tunnel A-14-1 Magnet QD146 Rplcd 11/26/1983 A-1Tevatron Tevatron Tunnel A-14-1A Magnet TSD66 Orignl A-1Tevatron Tevatron Tunnel A-14-2 Magnet TB1109 Rplcd 11/24/1981 A-1 6.25 1.3125 2.5625 6Tevatron Tevatron Tunnel A-14-3 Magnet TB0549 Orignl A-1 6.125 1.3125 2.5625 6.125Tevatron Tevatron Tunnel A-14-4 Magnet TC0490 Orignl A-1 6 1.3125 2.25 5.3125Tevatron Tevatron Tunnel A-14-5 Magnet TC0529 Orignl A-1 6.0625 1.3125 2.5625 6Tevatron Tevatron Tunnel A-15-1 Magnet QF27 Orignl A-1Tevatron Tevatron Tunnel A-15-1A Magnet TSA146 Rplcd 3/7/1984 A-1Tevatron Tevatron Tunnel A-15-1B Magnet FC10 Rplcd 3/7/1984 A-1Tevatron Tevatron Tunnel A-15-2 Magnet TC0527 Rplcd 3/7/1984 A-1 6.125 1.3125 2.5625 6.7875Tevatron Tevatron Tunnel A-15-3 Magnet TC0393 Orignl A-1 6.25 1.3125 2.5625 5.625Tevatron Tevatron Tunnel A-15-4 Magnet TB0277 Orignl A-1 5.625 1.3125 2.5625 5.9375Tevatron Tevatron Tunnel A-15-5 Magnet TB0299 Orignl A-1 6.125 1.3125 2.5625 6.7875Tevatron Tevatron Tunnel A-16-1 Magnet QD250 Orignl A-1Tevatron Tevatron Tunnel A-16-1A Magnet TSD93 Orignl A-1Tevatron Tevatron Tunnel A-16-2 Magnet TB0338 Rplcd 9/28/1983 A-1 5.625 1.3125 2.5625 5.9375Tevatron Tevatron Tunnel A-16-3 Magnet TB0328 Orignl A-1 6.7875 1.3125 2.5625 5.8125Tevatron Tevatron Tunnel A-16-4 Magnet TC0454 Orignl A-1 5.625 1.3125 2.5625 6.5Tevatron Tevatron Tunnel A-16-5 Magnet TC0468 Rplcd 3/8/1984 A-1 5.8125 1.3125 2.5625 5.75Tevatron Tevatron Tunnel A-17-1 Magnet QF199 Rplcd 3/9/1984 A-1Tevatron Tevatron Tunnel A-17-1A Magnet TSC70 Orignl A-1Tevatron Tevatron Tunnel A-17-2 Magnet BY3 Rplcd A-1Tevatron Tevatron Tunnel A-17-3 Magnet TB339 Orignl A-1Tevatron Tevatron Tunnel A-17-4 Magnet TB0365 Orignl A-1 5.875 1.3125 2.5625 5.8125Tevatron Tevatron Tunnel A-17-5 Magnet TB0351 Orignl A-1 5.6875 1.3125 2.5625 5.8125

Magnet Elevation off Floor

Action Items:

1. Improve roll fixture – Done (JV, FN)2. Develop elevation/ horizontal fixture.

a. Use a fixture, or b. Use survey group with help from (?).

3. Finish design and test of simple HLS system.1. Jessie’s simple system – test at MP-82. Design and test stretched wire system.

4. Develop cost and resource requirements for network.5. Measure bellows stress when magnet rolled in situ.6. Measure cryostat motion when magnet rolled in situ.7. Measure field change when cryostat elevated by 3 mils.8. Develop QC plan for smart bolt readjustment program.If we get all of this data, what will we do with it??

Jim Volk – Shutdown Coordinator

Sub-Teams

1. Stand Replacementa. Bruce Hannab. Mike McGeec. John Carson d. Mike Maye. Dave Augustine

2. Smart Boltsa. Bob Kephartb. Dave Hardingc. Mike Syphersd. Gerry Annalae. John Carsonf. John Tomkinsg. Tom Peterson

3. Data Handlinga. Mike Church b. Jeanc. Normd. Dave Ritchiee. CDF & DZero

4. Magnet Survey (Configuration Control)a. Jim Volk h. George Wojcikb. Bruce Hanna i. Terry Sagerc. Aimin Xiao j. Todd Johnsond. Norm Gelfand k. Duane Plante. Fred Nobrega l. Jesse Guerraf. Mike McGee m. Jean Slaughterg. Hans Jostlein n. Gerry Annala

Prototype Projects revised 030414

1 Establish vertical and horizontal nominal positions for all Tevatron Magnets. Ray, Aimin.(Done.)2 Remove roll from as many magnets as possible. Set magnets to nominal positions,

especially magnets in houses that will be warmed up. Bruce, Ray, Jim.3 Establish an alignment network. Ray, George Wojcik, Jim, Bruce.4 Install water level motion detectors in Sector B – Ray and Jim, Andre, Valdimir5 Install tilt monitors in suspicious locations in the Tevatron ring. – Todd, Duane, Bruce6 Make use of SDA to detect changes in the Tevatron. Ray, Bruce, Norm(Add Mike, Jean.)7 Improve roll measuring fixture, and develop a horizontal fixture. (Jim, Fred, Mike, Fred)8 Install a prototype stretched wire configuration – horizontal motion detector. (Jim, Hans, Jesse)9 Install a prototype capacitive height detectors (Bill Markel, Guerra, ray)(We dropped this??)10 Install a prototype DVDT/DVRT motion detection system. Mike, Todd. (We dropped this??)

For the summer shutdown, we will install and test prototype systems.

Next begin to put together detailed plans and cost estimates.

4. Survey We’ll need CDF & D0 participationand technical people from various places.

June 4, 2003.  What is the alignment budget for Tev stands? What can we measure or accomplish during normal downtime. How can we make best use of unscheduled down time? Make a list of motivations for these survey projects.Why are we doing these things?  Provide a short list of specs for each?  Readout electronics designed by PPD may be used for homemade, and economical HLS devices. Even with 12 new site risers, we believe we can achieve ½ mm accuracy in horizontal offset measurements. The ideal orbit as we define it is not complete: The ideal orbit assumes that the correctors are off, and we do not have sufficient understanding of the coordinates of the beam to know how to establish an ideal under this definition.

Some questions raised during the meeting:

References

1. Progress Report of the Tevatron Alignment Group, May 12, 2003.2. Possible Reshimming of Tevatron Dipoles in the Tunnel, 21 May 2003,

David Harding, Jamie Blowers, John Carson, Ray Hanft, Pierre Bauer.3. Tevatron Dipole Alignment by Laser Beam, May 19, 2003, Hans Jostlein.4. Horizontal displacements measuring system (proposal),

Budker Institute of Nuclear Physics, June-July 2002.5. Site Search and Investigation 1998- 2003, Clay Corvin, April 2003, Vol. 4

Nos. 3-4, NLC News.6. The Vertical Alignment of the D0 Overpass in the Fermilab Main Ring,

C.D. Moore, (Proceedings)7. SPS Data on Tunnel Displacements and the ATL Law, September, 1993

V. Shiltsev and R. Steining, SSCL-Preprint-505.8. Vibrational Analysis of Tevatron Quadrupoles, C.D. Moore,

(Private Communication.)9. LCLS Design Study Report, December, 1998, 12-1.10. Hydrostatic Leveling System with Laser Sensors, Rojsel and Stiefler.

References cont.

11. A Historic First on Accelerator Alignment, Danial Roux, 1993, Accelerator Alignment Conference.

12. Ground Vibration Measurements for Fermilab Future Collider Projects, Baklakov, Bolshakov, Chupyra, Erokhin, Lebedev, Parkhomchuk,Singatulin, PR Special Topics–Accelerators and Beams, Vol I, 031001 (1998).

13. Applications of Hydrostatic Leveling in Civil Engineering, D. Martin, 1993.14. Water Level Installation at A16, Jim Volk and Andrey Chupyra, February, 2003.15. BINP Hyrostatic Level Measurement System, A. Chupyra, private note.16. VLHC/NLC Slow Ground Motion Studies in Illinois, Shiltsev, Lach, Baklakov,

Chupyra, Erokhin, Kondaurov, Parkhomchuk, Shubin, Singatulin,FERMILAB-Conf-01/152 June 2001.