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. Maire Maire EP/ TA3 EP/ TA3 Gilles. 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

I nt roduct ion I nt roduct ion Horn and Ref lect or (Load) Horn and Ref lect or (Load) I Every 6s t 50ms •7 m long (approx.) Sandry Wallon IN2P3 • 1.6 tonne (approx.) 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 Charging Power Supply in surf ace Horn and Ref lect or Power cables I n Target Chamber (~1000m) along Access Galleries Pulse Transf ormer St rip Lines f rom I n Service Gallery 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 Unit HORN System REFLECTOR System Load Peak current kA 150 180 Transformer ratio 16 32 Primary current peak A 9375 5625 Load inductance µH 2,7 X 16 X 16 = 691 1,5 X 32 X 32 = 1540 Total inductance with 4 cables µH 1210 2046 m Ω Load resistance 0,6 X 16 X 16 = 154 0,21 X 32 X 32 = 215 m Ω Total resistance with 4 cables 328 495 Total capacitance for one pulse µF 4080 4080 Pulse duration ms 7,5 10 Charging voltage V 7700 6300 Total stored energy kJ 2 X 119 = 238 2 X 80 = 160 Load max. voltage V 280 150 Mean power dissipated by current kW 16 10,5 only (2 pulses) Total power dissipated (with beam) kW 26 16,5 Water flow for delta T= 5C l/min 70 70 Pressure bar 1,2 1,2 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 5

Elect rical Circuit Elect rical Circuit Diagram Diagram Charging Unit Discharge I 10kV - 20A Circuit 1 Thyristors Bridge Diodes Thyristors Bridge Capa TR Discharge t Polarity Changer Pulse 1 Earthing Start Stop Delay 50ms Charging Charging Power Cables (~1000m) Pulse 2 Experimental Area Thyristors Capa Discharge TR HORN Discharge Circuit 2 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 ? Beginning of Project NOW Thy. Bridge WANF Recuperation WANF Recuperation Power Supply Transfo. LV/HV NEW NEW Electronics WANF Recuperation NEW Capacitors WANF Recuperation NEW Discharge Switches NEW NEW Power Cables NEW NEW Pulse Transformers NEW WANF Recuperation 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 7

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 Component s and St at us Charging Power Supply Charging Power Supply Old Elect ronic New Elect ronic 6U 24U 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. � 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. � 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. 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 11

Component s and St at us Component s and St at us Capacit ors Discharge Capacit ors Discharge Capacitance 340µF + /-5% Operating Voltage 10000Vdc Reverse Voltage 50% Maximum Peak Current 1300A Energy 17kJ Repetition Rate 6sec 2x10 7 pulses Life Time < 3.3 m Ω Serial resistance Capacitor inductance < 100 nH Dielectric Stress 206 V/µm Ignition temperature of Rape seed oil: 344 ° C dielectric fluid Rough polypropylene film Dielectric system metallized L= 360mm Dimensions W= 335mm H= 705mm Weight 102kg 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 � 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. Rack wit h WANF capacit ors 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 Swit ches (20kV, 18kA) Swit ches (20kV, 18kA) Thyrist or - 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 Swit ches (20kV, 18kA) Swit ches (20kV, 18kA) Thyrist or 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. � 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 = 100m Ω , L = 160 µH. • Measurement s have been perf ormed on t he exist ing WANF cables. The impedance of t his cable was R = 110m Ω , L = 130µH. 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 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 150000 100000 50000 Simulat ion 0.002 0.004 0.006 0.008 0.01 0.012 -50000 -100000 SL Current Primary Current 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 150000 100000 50000 Simulat ion 0.001 0.002 0.003 0.004 0.005 0.006 -50000 -100000 SL Current Primary Current 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 I = 150kA Wat er Flow = 50l/ min at 1.5 bars Ambient t emp. = 20 ° C Primary Wat er t emp. = 20 ° C Start End Neck Small diam. 20 ° C 32 ° C Neck Big diam. 20 ° C 34 ° C Water IN Horn 20 ° C 26 ° C Water OUT Horn 20 ° C 30 ° C Transformer 20 ° C 50 ° C 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 21

Cont rols Cont rols Control Room supervision CERN network Ethernet Card Card Local Supervision PC Applicom Card Card Industrial Ethernet d i g i t a l PLC DISCHARGE POWER CIRCUIT CONVERTER Designed by Sylvain RAVAT EP/TA3 4t h NBI , 7 - 11 November 2003 at KEK by Gilles MAI RE 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