AND NEXT STEPS LARP P Collab labor orat ation ion Meet eting - - PowerPoint PPT Presentation

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AND NEXT STEPS LARP P Collab labor orat ation ion Meet eting - - PowerPoint PPT Presentation

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FERMILAB PROGRAM RESULTS AND NEXT STEPS LARP P Collab labor orat ation ion Meet eting ng 14 Fermilab rmilab, , April il 26-28 28 Guram am Chlachidz hidze Guram Chlachidze 4/27/2010 OUTLINE Introduction Single Nb 3 Sn

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SLIDE 1

FERMILAB PROGRAM RESULTS AND NEXT STEPS

LARP P Collab labor

  • rat

ation ion Meet eting ng 14 Fermilab rmilab, , April il 26-28 28 Guram am Chlachidz hidze

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SLIDE 2

OUTLINE

 Introduction  Single Nb3Sn quadrupole coil test in a “magnetic mirror”

structure

 Effect of coil pre-stress on magnet performance  Complementary to study performed by LARP (TQS03)

 Development and test of a quadrupole magnet with

“dipole style” collars

 Reduction of assembly time and of the risk of coil damage

 Future plans

4/27/2010 Guram Chlachidze 2

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SLIDE 3

INTRODUCTION

Fermilab, along with

  • ther

US National Laboratories, is developing a new generation of accelerator magnets based on Nb3Sn super-conductor

 Study and optimization of Nb3Sn strands and cables, insulation  Fabrication of coils and other components with various design and

processing features

 Fabrication and test of a series of model magnets  Nb3Sn coil technology scale-up

Recent technology developments within Fermilab’s base High Field Magnet (HFM) program include

 Quadrupole mirror structure to test single quadrupole coils in a real

magnetic field environment

 Assembly and test of a Technology Quadrupole (TQC) with a dipole

style collar design and coil alignment

4/27/2010 Guram Chlachidze 3

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SLIDE 4

TQ MIRROR STRUCTURE

 The “Magnetic Mirror” concept was developed for the HFM dipole and now

expanded to include the 90-120-mm quadrupoles

 Long mirror dipoles (LM01, LM02) were built and successfully tested for the Nb3Sn coil

technology scale-up

 Design details and first test results were presented at LARP Collaboration

Meeting 13 (Port Jefferson, November 2009) by Rodger Bossert

 http://larpdocs.fnal.gov/LARP-public/DocDB/DisplayMeeting?conferenceid=69

 Specific coil and cable features can be tested and optimized efficiently, in

a short time period

 Re-assembly turnaround time is about 3

weeks

 2.5 months required for construction of

a mirror magnet with a new coil (compare to ~ 6 months for a quadrupole magnet)

 Simplified structure – coil to coil

interactions not present – an intermediate step to speed up overall magnet development time

4/27/2010 Guram Chlachidze 4

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SLIDE 5

TQ MIRROR DESIGN FEATURES AND HISTORY

4/27/2010 Guram Chlachidze 5

Mirror COIL # STRAND AND CABL BLE INSULA SULATI TION ON COIL POLE

TQM01 19 RRP 54/61 LBNL S2-Glass Sleeve Bronze TQM02 17 RRP 54/61 LBNL S2-Glass Sleeve Bronze TQM03: a, b, c 34 RRP 108/127 FNAL E-Glass Tape Titanium

TQM01 and TQM02 mirror magnets were tested in Jan.-April 2009

Test results were presented at CEC/ICMC and MT-21 in 2009 Coil quench performance in the mirror structure found consistent with the performance in TQS and TQC models

TQM03 magnets tested in Jun.-Aug. 2009 and Feb.2010

3 variations with different coil pre-loads Cable based on RRP-108/127 strand was fabricated at Fermilab E-Glass tape was used for cable insulation instead of expensive S2-Glass sleeve

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SLIDE 6

COIL PRE-STRESSES IN QUADRUPOLE MIRROR

4/27/2010 Guram Chlachidze 6

MIRROR Measure ured d war warm stress ess (MPa Pa) Air Gap (mils) s) Predict cted d Cold stress ess (MPa Pa) TQM01 100 4 90 TQMO2 100 6 110 TQM03a 100 5 100 TQMO3b 105 8 145 TQM03c 135 10 185

Gauges bonded directly to coils confirmed pre-loads at room temperature, however these gauges are not compensated at LHe

  • temperatures. Therefore, cold pre-loads

are assumed from FEM analysis

Shim system = 17/7

Coil 34

7 mils (will remain after assembly.) 3 mil kapton sheets 5 mil kapton sheet (2) 2 mil kapton sheets (2) 5 mil kapton sheets 168 mil thick G-10 mid-plane shim 5 mil kapton 10 mils (will be removed after ini- tial pressing.)

TQM03c shim system Illustration

Next mirror magnet (TQM04) will be equipped with gauges connected in a full- bridge configuration on Titanium pole and will be compared to analysis

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SLIDE 7

4000 6000 8000 10000 12000 14000 16000

Quench ch Current nt (A)

TQM03a TQM03b TQM03c

TQM03 M03 QUEN ENCH CH TRAIN INING ING

4/27/2010 Guram Chlachidze 7

SSL at 4.5K ~ 13.0 kA 1.9K ~ 14.4 kA 4.5 K 4.5 K 1.9 K ~97% of SSL ~92% of SSL

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SLIDE 8

QUENCH LOCATIONS

4/27/2010 Guram Chlachidze 8 2000 4000 6000 8000 10000 12000 14000 16000 20 40 60

Current (A)

Quench Number

A6_A7 A7_A8 A8_A9 A10_B2 Coil cross section with flux density distribution in mirror magnet at 14 kA

TQM03b - all quenches in A10_B2 TQM03c - 4.5 K quenches in A10_B2 1.9 K quenches in A2_A3

2 T 10 T 6 T

TQM03a

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SLIDE 9

TQM03 RAMP RATE DEPENDENCE

4/27/2010 Guram Chlachidze 9

8000 9000 10000 11000 12000 13000 14000 100 200 300 400 Curren ent t (A) Ramp Rate e (A/s) TQM03a 4.5K TQM03b 4.5K TQM03c 4.5K 8000 9000 10000 11000 12000 13000 14000 100 200 300 400 Curr rren ent t (A) Ramp Rate e (A/s) TQM03a 1.9K TQM03b 1.9K TQM03c 1.9K 4.5 K 1.9 K A B C A B C

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SLIDE 10

11800 12000 12200 12400 12600 12800 13000 13200 13400 13600 13800 1 1.5 2 2.5 3 3.5 4 4.5 5

Current ent (A)

Temp mper erature ature (T) TQM03a TQM03b TQM03c

TQM03 TEMPERATURE DEPENDENCE

4/27/2010 Guram Chlachidze 10

Ramp rate : 20 A/s

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SLIDE 11

SUMMARY OF TQM03 MODELS

4/27/2010 Guram Chlachidze 11

A “magnetic mirror” structure for quadrupole coil evaluation has been developed and successfully employed in testing at Fermilab Coil with Nb3Sn RRP-108/127 strand and new cable insulation (E-Glass tape) demonstrated excellent quench performance and improved stability at 1.9 K

  • RRP 108/127 is now LARP baseline strand
  • E-glass insulation is considered for long LQ coils

Coil pre-stress up to ~185 MPa does not introduce significant degradation in conductor Ic (consistent with TQS03 test data). However noticeable degradation of conductor stability at 1.9 K was

  • bserved (TQM03c)

Next : New Nb3Sn coil (RRP 108/127) with cored conductor is ready for test in mirror structure (TQM04)

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SLIDE 12

TQC MAGNET WITH DIPOLE STYLE COLLARS

 Feasibility of quadrupole support structure and collaring procedure

based on traditional quadrupole-style collar have been demonstrated in several TQC model magnets

 Requires additional horizontal to vertical handling of the coils  Collaring using short vertical 4-jaw press with partial coil

compression along the length

 Time consuming process with many (~6-8) passes and some

risk of damage to coils

 Dipole style collar design

 Collaring using full-length horizontal press  Collaring in a single pass reducing coil degradation risks and

construction time

4/27/2010 Guram Chlachidze 12

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SLIDE 13

TQC02EB TEST AT FERMILAB

 Magnet was built with Nb3Sn coils (RRP 54/61) already tested in both shell

and collar structures

 4 variations of TQS02 magnet were tested at Fermilab and CERN  TQC02Ea with coils 20,21,22 and 23 previously tested at Fermilab

 Standard shim configuration with a target stress of ~120 MPa at 4.5 K  First time dipole style collars

are used in TQC magnet

 Coil alignment key installed  Test at 4.5 K and 1.9 K included magnet training, ramp rate

and temperature dependence study

4/27/2010 Guram Chlachidze 13

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SLIDE 14

4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54

Current ent (A)

Quench h Nu Number ber

coil 20 coil 22 coil 23 coil 28

TQC02EB QUENCH HISTORY

4/27/2010 Guram Chlachidze 14

4.5 K 4.5 K 1.9 K

~211 T/m ~217 T/m

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SLIDE 15

TQC02E AND TQS02 PERFORMANCE AT 4.5 K

4/27/2010 Guram Chlachidze 15

4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

Current ent (A)

Quench h Nu Number ber TQC02Ea 4.5K TQC02Eb 4.5K TQS02a 4.5K TQS02c 4.2K

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SLIDE 16

TQC02EB RAMP RATE DEPENDENCE

4/27/2010 Guram Chlachidze 16

6000 7000 8000 9000 10000 11000 12000 13000 14000

100 200 300

Curren ent t (A)

Ramp Rate (A/s) TQC02Eb 4.5K TQS02c 4.2K 6000 7000 8000 9000 10000 11000 12000 13000 100 200 300

Curren ent t (A)

Ramp Rate (A/s) TQC02Eb 1.9K TQS02c 1.9K

4.5 K 1.9 K

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SLIDE 17

TQC02EB TEMPERATURE DEPENDENCE

4/27/2010 Guram Chlachidze 17

10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 1 2 3 4 5

Current ent (A)

Temp mper erature ature (K) TQC02Eb 50A/s TQS02c 20A/s

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SLIDE 18

SUMMARY ON TQC02EB TEST

4/27/2010 Guram Chlachidze 18

The first Technology Quadrupole with a dipole style collar design - TQC02Eb

  • was built and tested successfully at Fermilab

TQC02Eb reached ~211 T/m field gradient at 4.5 K and ~217 T/m at 3.2K temperature Coil quench performance in magnets of shell (TQS02) or collar (TQC02E) structure is consistent Multiple handling and test cycles demonstrates that the TQ Nb3Sn coil design is robust Magnetic field measurements do not show any significant distortions related to the dipole style collar design in TQC02Eb

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SLIDE 19

CONCLUSIONS AND FUTURE PLANS

The quadrupole mirror structure, developed at Fermilab, has confirmed the expected technical performance and high efficiency The mirror concept can be easily adapted to test long LQ or 120-mm diameter HQ coils Future Plans:

 A Nb3Sn coil (RRP 108/127) with stainless steel cored conductor is ready for

test in the mirror structure (TQM04)

 Standard S2-Glass sleeve insulation  Titanium pole pieces

 Work on a long mirror structure for LQM01 in progress

 Mirror structure is available  Fabrication of long coil with Nb3Sn 114/127 strand and E-Glass insulation has

started

 Cold test expected in September 2010

 Mirror structure for HQ coil test is available

 Choice of coil and schedule under discussion

 Test of TQ coil impregnated with liquid polyimide (MATRIMID) – TQM05

(planned for FY 2011)

4/27/2010 Guram Chlachidze 19

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SLIDE 20

CONCLUSIONS AND FUTURE PLANS

Dipole style collar design and collaring process were developed and successfully tested at Fermilab using TQ coils

 Performance consistent with the test results from shell structure

magnets (TQS02a/c) or collared structure magnet with a quadrupole style collar (TQC02Ea)

 Dipole style collar configuration can easily be adopted for long

structures

 Next steps:

 Test of Nb3Sn coils made of RRP-108/127 strand using dipole style

collars (expecting TQS03 coils in May)

 Test of 4-m long quadrupole based on dipole style collars

(recycle LARP LQ coils, planned for FY 2011)

4/27/2010 Guram Chlachidze 20

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SLIDE 21

BACKUP SLIDES

4/27/2010 Guram Chlachidze 21

slide-22
SLIDE 22

4/27/2010 Guram Chlachidze 22

Magnetic netic Design gn - SSL SSL

The he esti estimat ated ed magne agnet que quenc nch curr currents ents based based on

  • n the

the “reference” curr current nt de densi nsity of

  • f

2800 00 A/mm A/mm^2 at at 4.5 K and and 1.9 K are are sho shown be

  • below. Thi

his SSL SSL is is based based on

  • n the

the mirr rror

  • r

magne agneti tic feature eatures an and the the pre presentati sentation

  • n by

by Pao aolo Fer erraci racin, “TQ Per erformance

  • rmance

Overview” on

  • n Sept. 8, 2008

2008 at at the the TQ TQ dis iscuss ussion tele leconf nfere erence nce.

Magnet Iss (kA) Iss (kA) 4.3K-4.5K 1.9K TQM01 (2800 A/mm^2) 13.0 14.4 TQS02 (2800 A/mm^2) 13.8 15.1 TQC02 (2800 A/mm^2) 13.9 15.1 SSL in TQS, TQC and TQM structures compared.

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SLIDE 23

TQM03 QUENCH TRAINING

4/27/2010 Guram Chlachidze 23

4000 6000 8000 10000 12000 14000 16000 10 20 30 40 50 60 70

Quench ch Current nt (A)

Quench h Nu Number ber TQM03a TQM03b TQM03c 1.9 K 1.9 K 4.5 K 1.9 K 1.9 K 4.5 K 4.5 K

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SLIDE 24

TQM03 TEMPERATURE DEPENDENCE

4/27/2010 Guram Chlachidze 24

11400 11600 11800 12000 12200 12400 12600 12800 13000 13200 13400 1 1.5 2 2.5 3 3.5 4 4.5 5

Curren ent t (A)

Temp mper erature ature (T) TQM03a 100 A/s TQM03b 100 A/s TQM03c 100 A/s

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SLIDE 25

TQM03 RRR DATA

4/27/2010 Guram Chlachidze 25

50 100 150 200 250

a2_a _a3 a3_a _a4 a4_a _a5 a7_a _a8 a8_a _a9 a9_a _a10 a10_b 0_b2 Wcoil

  • il

Inner ner Hcoil Outer er Hcoil il

RRR RRR TQM03a TQM03c

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SLIDE 26

TQM01/02/03 MIRRORS

5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 15000 10 20 30 40 50 60 70 80 90 100 110 120

current, A quench #

TQM03a 4.5K TQM03a 1.9K TQM01 TQM02 4.5K TQM02 1.9K

TQM02 (RRP 54/61) TQM01 (RRP 54/61) TQM03a (RRP 108/127)

4/27/2010 26 Guram Chlachidze

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SLIDE 27

TQC02EB: RRR DATA

4/27/2010 Guram Chlachidze 27

50 100 150 200 250 300

28a2_28a3 28a3_28a4 28a4_28a5 28a5_28a6 28a7_28a8 28a9_28… 28a10_2… 28b6_28b5 28b5_28b4 28b4_28b3 28b3_28b2 20a1_20a3 20a3_20a4 20a4_20a5 20a5_20a6 20a7_20a8 20a9_20… 20a10_2… 20b6_20b5 20b5_20b4 20b4_20b3 20b3_20b2 23b2_23b3 23b3_23b4 23b4_23b5 23b5_23b6 23b6_23… 23a10_2… 23a8_23a7 23a6_23a5 23a5_23a4 23a4_23a1 22b2_22b3 22b3_22b4 22b5_22b6 22b6_22… 22a10_2… 22a8_22a6 22a6_22a5 22a3_22a2 Wcoil Hcoil1 Hcoil2

RRR RRR

50 100 150 200 250 300

20 21 22 23

Coils 20, 28 Coils 22, 23 TQC02E RRR

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SLIDE 28

MAGNETIC MEASUREMENTS AT 4.5 K

b a 3

  • 3.57

4.71 4

  • 3.34
  • 0.29

5 0.20

  • 0.76

6

  • 0.62

0.05 7 0.03 0.10 8

  • 0.07

0.10 9 0.06

  • 0.02

10 0.01 0.02

4/27/2010 Guram Chlachidze 28

TQC02Eb averaged body harmonics Measured gradient 111 T/m at 6500 A. Reference radius ~ 1inch TF = 17.1 T/m/kA

n

TQC TQS calc measured calc measured 01 02E 01 02

b3

  • 2.01

1.07

  • 1.46

2.98 b4

  • 1.90
  • 2.92
  • 0.52

1.31 b5

  • 0.58
  • 2.11
  • 3.06
  • 1.45

b6 0.90 1.71 2.72 5.00 5.40 6.23 b7

  • 0.07
  • 0.37
  • 0.07

0.05 b8

  • 0.01

0.12

  • 0.11
  • 0.13

b9

  • 0.04

0.08

  • 0.02

0.10 b10 0.00

  • 0.06
  • 0.02
  • 0.04

0.02

  • 0.05

a3

  • 1.72

1.17

  • 4.41

0.66 a4

  • 0.62

1.47

  • 1.99

0.82 a5

  • 1.33
  • 3.31
  • 0.71
  • 1.50

a6

  • 0.10

0.59

  • 0.37

0.12 a7

  • 0.10
  • 0.09
  • 0.11
  • 0.01

a8

  • 0.03
  • 0.19
  • 0.18
  • 0.10

a9

  • 0.08

0.11

  • 0.02

0.02

a10

  • 0.00
  • 0.08
  • 0.00
  • 0.08