connection cryostats status of bus bars studies report to nmpp v parma p borowiek c maglioni n.
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Connection Cryostats: status of bus bars studies Report to nMPP V.Parma, P.Borowiek, C.Maglioni. C.Maglioni, MSC-IC. Mechanical calculations of BB deflections. Observations in 11L6 (J.-Ph.T. & C.). Modelling of bus bars c onstraints. FP. 1. 2. 3. 4. 5. 6. 7. 1. 2. 3. 4. 5. 6.

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Presentation Transcript
slide5

Electro-magnetic forces

  • In-plane mechanical model
  • Proportional to I2
  • Inv. proportional to distance

Comsol Multi-physics

slide9

Sector cold

LE.L5 (Long)

Powered 22 times on RB (<10.3kA), 14 times on RQs (<10.9 kA)

M3

0

(1’000)

2’070

(860)

1440

(1’000)

850

(1’000)

550

(1’000)

??

(1’000)

09Apr2008

1’060

(1’000)

??

(1’000)

??

(1’000)

??

(1’000)

??

(1’000)

??

(850)

FP

1

2

3

4

5

6

7

1

2

3

4

5

6

Fixed Point

Sliding Support

state on 06 April 2009, modified by Pawel Borowiec

slide11

Powered 105 times on RB (<11.2kA), 76 times on RQs (<11.3kA)

Sector warm

LE.L6 (Short)

M1

31Mar2009

13Feb2009

130

??

(100)

970

(1’000)

??

(389)

1’010

(1’000)

1520

(1’000)

860

(1’000)

640

(500)

400

(500)

1’000

(1’000)

440

(1’000)

1’000

(1’000)

110

(1’000)

1’870

(1’000)

920

(1’000)

450

(379)

FP

1

2

3

4

5

6

7

1

2

3

4

5

6

bent

bus-bar

M2

To be measured again

110

(100)

??

(1’000)

??

(389)

??

(1’000)

??

(1’000)

??

(1’000)

??

(500)

31Mar2009

500

(500)

990

(1’000)

??

(1’000)

1’000

(1’000)

1’200

(1’000)

1’010

(1’000)

920

(1’000)

480

(379)

FP

1

2

3

4

5

6

7

1

2

3

4

5

6

M3

31Mar2009

13Feb2009

160

??

(100)

1280

(1’000)

??

(389)

1’260

(1’000)

680

(1’000)

1’040

(1’000)

640

(500)

1’000

(1’000)

640

(1’000)

780

(1’000)

80

(1’000)

2’160

(1’000)

480

(1’000)

890

(379)

FP

1

2

3

4

5

6

7

1

2

3

4

5

6

Fixed Point

state on 06 April 2009, modified by Pawel Borowiec

Sliding Support

summary of mechanical calculation
Summary of mechanical calculation
  • With nominal spacing:
    • M1, M2 (quad BB): elesticity marginal @ 5TeV; some plastic def. at ultimate; deflections well within tube diameter
    • M3 (dip. BB): within elastic domain up to ultimate; deflections well within tube diameter
  • Maximum acceptable supports spacing (tube contact) for quad BB (limiting as compared to dip. BB):
    • @ 5 TeV: up to ~1.55 m
    • @ nominal: up to ~1.33 m
    • @ ultimate: up to ~1.3 m