Electrical Discharge Circuit for CNGS Horn & Reflector PH/DT1 Group Meeting, 23 October 2007 Gilles MAIRE PH/DT1-IC Section Leader

Physics  At CERN Protons extracted in point 4 of SPS. Pions & Kaons after Target. Muons Neutrinos after Decay Tunnel.  At Gran Sasso Opera Detector. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC1

Horn and Reflector PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC2

Introduction Horn and Reflector (Load) 7 m long (approx.) 1.6 tonne (approx.) PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC3

4 Horn Picture

Electrical Circuit PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC6

UnitHORN SystemREFLECTOR System Load Peak currentkA Transformer ratio1632 Primary current peakA Load inductanceµH2,7 X 16 X 16 = 6911,5 X 32 X 32 = 1540 Total inductance with 4 cablesµH Load resistance mm 0,6 X 16 X 16 = 1540,21 X 32 X 32 = 215 Total resistance with 4 cables mm Total capacitance for one pulseµF4080 Pulse durationms7,510 Charging voltageV Total stored energykJ2 X 119 = 2382 X 80 = 160 Load max. voltageV Mean power dissipated by current only (2 pulses) kW1610,5 Total power dissipated (with beam)kW2616,5 Water flow for delta T=5Cl/min70 Pressurebar1,2 Electrical Parameters PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC5 HV Capa. Th. Disch. TR. Pulse

General View Horn and Reflector In Target Chamber Charging Power Supply in surface Power cables (~1000m) along Access Galleries Pulse Transformer In Service Gallery Strip Lines from Transformers to Horn & Reflector PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC7

Layout in BHA4 3 PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC8

Cross section in underground 4th NBI, November 2003 at KEK by Gilles MAIRE9 Transformer Load

Charging Power Supply Old Electronic New Electronic AB/PO Group 24U 6U PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC10

Charging Power Supply  Need to increase charging voltage to 10kV. Buy new transformer (LV/HV), call for tender for 3 units for a cost of 30kchf. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC11

Charging Power Supply Old New  New HV Rectifier Diode Need to increase charging voltage. Call for tender for 30 units for a cost of 30kchf. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC12  Results Space saving. Number of diodes divided by 2.

Capacitors Discharge Rack with New capacitors  New capacitors 12 racks with a total of 48 capacitors. Call for tender for a cost of 350kchf.  Results Space saving. Number of racks divided by 3. Important cost saving (300kchf) for infrastructure and cabling. Rack with WANF capacitors PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC13

Discharge Circuit Old New  New Inductance Call for tender for 12 units for a cost of 40kchf. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC14  Results Space saving. Number of inductance divided by 6.

Thyristor Switches (20kV, 18kA)  New Th. Discharge All Th. Switches needed have been bought and delivered by ARCEL (FR). 6 units for 150 kchf. 3 thyristors in series, sharing resistor, RC snubber and impulse transformer. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC15

Pulse Transformers  Pulse Transformer Reusing WANF Transformers ratio 32. Adaptation ratio 16 for Horn. Cost saving 450kchf. Ratio 16 PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC16

18kV Power Cables  Power cables Call for tender for 6 X 1km (4X95mm2), have been bought and delivered by PIRELLI. Cost of 350kchf. 80kchf for laying. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC17

PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC18

Connection in BHA4 Junction in ECA4 Connection in TSG Electrical & Continuity Test 20th January kV Power Cables Connection PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC19

Control Designed by Sylvain RAVAT EP/TA3 latigid PVSS Supervisor in BHA4 DISCHARGE CIRCUIT POWER CONVERTER Designed by Sylvain RAVAT EP/TA3 Control Room supervision VME, TG8, MIL1553, G64 POW protocol - CMW UNICOS CESAR Logging Alarms Horn’s interlocks Interlocks Ethernet Network EARTH & POLARITY Interlocks REMOTE I/O FIP Bus Surface BHA4Underground PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC20

Control in Surface (BHA4) PLC Rack in BHA4  Schneider Unity.  UNICOS.  Programming Process.  Hardware interlocks. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC21

Control in Underground Remote I/O in TSG Instrumentation of Cooling Unit in TSG  FIP I/O and conditioning signal.  Cooling Unit. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC22

PVSS Electrical View Designed by Sylvain RAVAT EP/TA3 PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC23

PVSS Hydraulic View Designed by Sylvain RAVAT EP/TA3 PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC24

Hydraulic View Designed by Sylvain RAVAT EP/TA3  Trending.  Historical.  Alarm. PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC25

Commissioning in May 2006 Designed by Sylvain RAVAT EP/TA3 50ms 150kA 180kA 50ms Double pulse for Horn. Time pulse of 6,5ms conform with simulation Double pulse for Reflector. Time pulse of 10ms conform with simulation PH/DT1 Group Meeting, 23 October2007 by Gilles MAIRE PH/DT1-IC26