The CNGS Horns The CNGS Horns Elect rical Syst ems Elect rical - - PowerPoint PPT Presentation

The CNGS Horns The CNGS Horns Elect rical Syst ems Elect rical Syst ems

4t h workshop on Neut rino Beams and I nst rument at ion 7 – 11 November 2003 at KEK

Gilles.

• Gilles. Maire

Maire EP/ TA3 EP/ TA3

1

Out line Out line

I nt roduct ion. Elect rical Circuit . Component s and St at us. Test of inner conduct or Horn. Cont rols. Planning. Conclusions.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 2

• 7 m long (approx.)
• 1.6 tonne (approx.)

Sandry Wallon IN2P3

50ms

t I

Every 6s

I nt roduct ion Horn and Ref lect or (Load) I nt roduct ion Horn and Ref lect or (Load)

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 3

I nt roduct ion I nt roduct ion General View General View

Horn and Ref lect or I n Target Chamber Charging Power Supply in surf ace Power cables (~1000m) along Access Galleries Pulse Transf ormer I n Service Gallery St rip Lines f rom Transf ormers t o Horn & Ref lect or

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 4

I nt roduct ion I nt roduct ion Paramet ers Paramet ers

70 70 l/min Water flow for delta T= 5C 1,2 1,2 bar Pressure 16,5 26 kW Total power dissipated (with beam) 10,5 16 kW Mean power dissipated by current

• nly (2 pulses)

150 280 V Load max. voltage 2 X 80 = 160 2 X 119 = 238 kJ Total stored energy 6300 7700 V Charging voltage 10 7,5 ms Pulse duration 4080 4080 µF Total capacitance for one pulse 495 328 mΩ Total resistance with 4 cables 0,21 X 32 X 32 = 215 0,6 X 16 X 16 = 154 mΩ Load resistance 2046 1210 µH Total inductance with 4 cables 1,5 X 32 X 32 = 1540 2,7 X 16 X 16 = 691 µH Load inductance 5625 9375 A Primary current peak 32 16 Transformer ratio 180 150 kA Load Peak current REFLECTOR System HORN System Unit

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 5

Elect rical Circuit Diagram

Pulse 1 Pulse 2 Delay 50ms Start Charging Stop Charging Thyristors Bridge TR Diodes Bridge Capa Capa Thyristors Discharge Thyristors Discharge Discharge Circuit 1 Discharge Circuit 2 Charging Unit 10kV - 20A Polarity Changer Earthing HORN TR Experimental Area Power Cables (~1000m)

I t

Elect rical Circuit Diagram

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 6

Elect rical Circuit Elect rical Circuit WANF Recuperat ion or NEW ? WANF Recuperat ion or NEW ?

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 7

WANF Recuperation NEW Pulse Transformers NEW NEW Power Cables NEW NEW Discharge Switches NEW WANF Recuperation Capacitors WANF Recuperation NEW NEW WANF Recuperation NEW WANF Recuperation

• Thy. Bridge

Power Supply

• Transfo. LV/HV

Electronics NOW Beginning of Project

Component s and St at us Component s and St at us Charging Power Supply Charging Power Supply

Need t o increase charging volt age t o 10kV.

• Buy new t ransf ormer (LV/ HV), f irst delivery in J uly 2003 and

second f or J uly2004.

• All ot her power component s can work at 10kV.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 8

Component s and St at us Component s and St at us Charging Power Supply Charging Power Supply

Elect ronic regulat ion and int erlocks.

• Old and obsolet e regulat ion (25 years old). We had spare cards

but elect ronic component s didn’t exist on t he market .

• The Power Group will t ake in charge t his inst allat ion af t er
• commissioning. We will inst all a st andard elect ronics of t his
• group. The st udy and inst allat ion will be done f or t he end of

2003.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 9

Component s and St at us Charging Power Supply

Old Elect ronic New Elect ronic

24U 6U

Component s and St at us Charging Power Supply

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 10

Component s and St at us Component s and St at us Capacit ors Discharge Capacit ors Discharge

At t he beginning of Proj ect

• We want ed t o reuse WANF capacit ors.
• For saf et y and inf rast ruct ure const raint s, Saf et y Division of

Cern f orced t o us t o inst all t his equipment in a new building. The est imat e cost of t his new building was 650kCHF.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE

Call f or Tender

• Result of t he Call f or Tender was in J une 2003, AVX-TPC (FR).
• Pre-Series in December 2003 and series in Sept ember 2004.

Now

• Af t er new st udy, we will buy new capacit ors (self healing

t echnology) f or a cost of 200kCHF.

• We will inst all equipment in an exist ing building.

11

Component s and St at us Component s and St at us Capacit ors Discharge Capacit ors Discharge

102kg Weight L= 360mm W= 335mm H= 705mm Dimensions Rough polypropylene film metallized Dielectric system Rape seed oil: 344°C Ignition temperature of dielectric fluid 206 V/µm Dielectric Stress < 100 nH Capacitor inductance < 3.3 mΩ Serial resistance 2x107 pulses Life Time 6sec Repetition Rate 17kJ Energy 1300A Maximum Peak Current 50% Reverse Voltage 10000Vdc Operating Voltage 340µF + /-5% Capacitance

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 12

Component s and St at us Component s and St at us Capacit ors Discharge Capacit ors Discharge

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 13

Component s and St at us Component s and St at us Capacit ors Discharge Capacit ors Discharge

Rack wit h WANF capacit ors

WANF capacit ors

• 36 racks wit h a t ot al of 360 capacit ors.

New capacit ors

• 12 racks wit h a t ot al of 48 capacit ors.

Result s

• Space saving. Number of racks divided

by 3.

• I mport ant cost saving f or inf rast ruct ure

and cabling.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 14

Component s and St at us Component s and St at us Thyrist or Thyrist or Swit ches (20kV, 18kA) Swit ches (20kV, 18kA)

• All Th. Swit ches needed

have been bought and delivered by ARCEL (FR).

• 3 t hyrist ors in series,

sharing resist or, RC snubber and impulse t ransf ormer.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 15

Component s and St at us Component s and St at us Thyrist or Thyrist or Swit ches (20kV, 18kA) Swit ches (20kV, 18kA)

2 Th. Swit ches are already inst alled and t est ed inBA7.

• 8,2kV, 170kA wit h rat io 32
• 6,5kV, 150kA wit h rat io 10

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 16

Component s and St at us Component s and St at us Power Cables Power Cables

I mport ant paramet ers f or t he choice of t he power cables.

• Resist ance and induct ance cable must be much smaller t han load

impedance (Transf ormer, St rip Lines and Horn).

To minimize t he volt age drop in t he cable. Not t o increase t oo much t he durat ion of t he pulse.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE

Our choice.

• Four 18kV cables in parallel (each wit h 2 t wist ed 150 mm2 CU

conduct ors) will be inst alled per syst em.

• For 4 cables in parallel, t he resist ance and induct ance (Nexans dat a

sheet ) will be : R = 100mΩ, L = 160 µH.

• Measurement s have been perf ormed on t he exist ing WANF cables.

The impedance of t his cable was R = 110mΩ, L = 130µH.

17

Component s and St at us Component s and St at us Pulse Transf ormers Pulse Transf ormers

At t he beginning of t he proj ect

• We want ed t o buy 2 new t ransf ormers wit h rat io 14 f or an

est imat e cost of 580kCHF.

Now, reusing of WANF t ransf ormers

• A t est program has been realized t o validat e t he reusing of t he

2 Tesla pulse t ransf ormers of WANF.

• We can reuse t his t ransf ormers in rat ion 32 or 16 (special

coupling in t he secondary side.

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 18

Component s and St at us Component s and St at us Pulse Transf ormers Pulse Transf ormers

Rat io 32

SL Current Primary Current

0.002 0.004 0.006 0.008 0.01 0.012

• 100000
• 50000

50000 100000 150000

Simulat ion

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 19

Component s and St at us Component s and St at us Pulse Transf ormers Pulse Transf ormers

Rat io 16

Primary Current SL Current

0.001 0.002 0.003 0.004 0.005 0.006

• 100000
• 50000

50000 100000 150000

Simulat ion

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 20

Test of inner conduct or Horn Test of inner conduct or Horn 100.000 double pulses in Oct . 2003 100.000 double pulses in Oct . 2003

50°C 20°C Transformer 30°C 20°C Water OUT Horn 26°C 20°C Water IN Horn 34°C 20°C Neck Big diam. 32°C 20°C Neck Small diam. End Start

I = 150kA Wat er Flow = 50l/ min at 1.5 bars Ambient t emp. = 20°C Primary Wat er t emp. = 20°C

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 21

Cont rols

Card Card

Industrial Ethernet CERN network Ethernet Card Applicom Card PLC Local Supervision PC

POWER CONVERTER DISCHARGE CIRCUIT

Designed by Sylvain RAVAT EP/TA3

Control Room supervision 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE

Cont rols

22

Cont rols Cont rols

PLC Racks

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 23

Cont rols Cont rols

General View

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 24

Cont rols Cont rols

Hist orical View

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 25

Planning Planning

• Nov. 2003

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 26

Conclusions Conclusions

Elect rical circuit

• Good progress since t he beginning of t he proj ect wit h t he

validat ion of t he elect rical circuit .

4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE

Cost Saving of 750kCHF since t he beginning of proj ect .

• Migrat ion t o an exist ing building wit h new capacit ors.
• Reusing of t he pulse t ransf ormers.

Test and Key dat e

• Validat ion of t he f irst Horn inner conduct or wit h 100.000 double

pulses during Oct ober 2003.

• Test of t he t wo Horns and Ref lect or bef ore t he end of 2004.
• Power cables will be inst alled at t he beginning of 2005.
• Moving elect rical circuit in BHA4 at t he beginning of 2005.

27