STATUS REPORT ON DIPOLE MAGNETS FOR TRANSFER LINE-2 FOR CTF3 22 Jan 2008 S.S. PRABHU, A. K. JAIN & V. C. SAHNI RRCAT, INDORE (INDIA)

Specifications  Sr. No. Parameters Values (Type-1) 35 0 Values (Type-2) Nominal Field1.3 Tesla 2Nominal current340 A 3Pole Gap45 mm ± 50 micron 4Pole width240 mm 5Coil Pocket size176 mm (width) X mm (height) 6Yoke Length0.465 m(0.235 m) 7Magnetic Length0.518 m0.268 m 8Bending Angle35°17.5° 9Construction Length0.92 m0.69 m 10Core weight1273 kg640 Kg 11Coil weight860 Kg.445 Kg 12No of Pan Cakes44 13No of turns48/pancake 14Total no of turns192 15Resistance60 milli-Ohm32.5 milli-ohm 16Voltage20.4 Volts11.3 volts 17Power dissipated6.8 Kilo-watt(3.8 KW) 18Cooling water flow9.5 LPM 19Pressure drop2.4 ata1.24 ata 20No of cooling circuits44 21Water temperature rise 11  C5.8  C 22Quantity Required2 Nos.3 Nos. DIPOLE MAGNET

DIPOLE MAGNET ASSEMBLY Overall Size of Assembled Dipole Magnet (35  bending angle) Magnet height – 640 mm Magnet Width – 1000 mm ( ) Magnet Length – 910 mm Magnet total weight kg

Fabrication Stages : Laser Cutting of Stampings. Stacking of stampings & pressing to form a block. Welding of stampings to get block. Machining of pole surface & other reference surfaces. Assembly of two blocks along with water cooled coil pancakes.

Stacking Fixture

Stacking Fixture with laminations

First short magnet core assembly at RRCAT

Coil winding

Coil potting

Finished coil and magnet assembly

Magnet measurement of first dipole magnet at RRCAT Details of coil interconnections

Assembled short magnet

Packing of short magnet

Arrangement for safe transportation

Final packing ready for shipment

Painting of remaining cores

Magnet Core Fabrication Inspection Details – Before welding Sr noMagnet no Magnet type Block noPacking Block dimensions before weldingDate of factor Left top Left bottomRt top Rt bottomcentrecompletion 1 CLIC-TL2-DP-S-01 First Shortfirst /8/2007 second /8/ CLIC-TL2-DP-S-02 Second Shortfirst /10/2007 second /10/ CLIC-TL2-DP-S-03 3rd Shortfirst /10/2007 second CLIC-TL2-DP-L-01 First Longfirst /9/2007 second /9/ CLIC-TL2-DP-L-02 Second Longfirst second /10/2007

Magnet Core Fabrication Inspection Details – After welding Sr noMagnet no Magnet type Block no Block dimensions after weldingTotalDate of Left top Left bottomRt top Rt bottomcentreweightcompletion 1 CLIC-TL2-DP-S-01 First Shortfirst /8/2007 second /8/ CLIC-TL2-DP-S-02 Second Shortfirst /10/2007 second /10/ CLIC-TL2-DP-S-03 3rd Shortfirst /10/2007 second CLIC-TL2-DP-L-01 First Longfirst /9/2007 second /9/ CLIC-TL2-DP-L-02 Second Longfirst second /10/2007

Short dipole magnets Long dipole magnets

Dipole Magnet Fabrication Status as on 15 th Jan 2008 Stages of FabricationS-1S-2S-3L-1L-2 Machining work 2 blocksCompleteCompletedComplete Assembly of CoreCompleteCompletedComplete Coil winding 8 pan cakesComplete Winding Started Coil Potting 4 double pan cakes Complete Magnet Assembly workCompleted dt Completed on 4 th Jan 2008 Completed on 11 th Jan 2008 Magnet Magnetic Testing workComplete Painting workCompleteComplete except finish coat Packing in BoxComplete 18 th Dec 07

S-1 - Short Dipole Magnet Magnetic Field Measurement Results Current Amp B 0 in Tesla dB/B 0 for 120 mm radial dist B 0 L in Tesla-mm dBL/B 0 L for 120 mm radial dist 166 A A A A

Further Work Optimization of first short dipole magnet entry-exit taper angle at CERN. Providing same taper on entry-exit block of all balance 4 dipole magnets at RRCAT, India Magnetic measurement of remaining 4 dipole magnets at RRCAT, India

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