A. Yamamoto, Y. Makida, Y. Doi, T. Haruyama, M. Kawai, Y. Kondo, H. Yamaoka, T. Kondo (KEK) S. Mizumaki, S. Mine (Toshiba) R. Ruber, F. Haug, H. ten Kate (CERN)

アトラス測定器超伝導ソレノイド：アトラス測定器超伝導ソレノイド： ATLAS Superconducting ATLAS Superconducting

Central SolenoidCentral Solenoid Design parameters

Size inner diameter 2.46 m outer diameter 2.63 m

axial length 5.30 mMass cold mass 5.4 ton total weight 5.7 tonCoil turns/coil 1173 nominal current 7.6 kA

inductance 1.35 H stored energy 39 MJcentral field 2.0 T peak field 2.6 Tramp up time 0.5 h

Conductor size 30 x 4.25 mm2 total length 10 km

Al:Cu:NbTi 15.6 : 0.9 : 1 number of strands 12

strand diameter 1.22 mm RRR aluminum > 500 working point at 4.5K 20 % temperature margin 2.7 KCooling at 4.5K 130 W at 60-80K 500W

helium mass flow 6-20 g/s cool down time 8 days

Main features to minimize the coil radiation thickness:

1. Common cryostat with the LAr EM calorimeter.2. High strength aluminum stabilizer.3. Fast quench axial propagation using pure Al strip

s.4. Triangle supports from the Inner warm vessel.

1998: test ofAl-stabilizedConductor

2005.11.4: Barrel calorimeter in place.

2000.12.26 : Excitation curve

2001.7.24 : Shipping from Yokohama Bay

2001.9.27: at CERN B180 with CERN DG

1999.4-6: Coil winding at Toshiba 1999.12.: Coil mounted on the Inner Warm Vessel

by 24 triangle supports at Toshiba Keihin Factory.

2003.12: in front of Control Dewar in B180

2004.2.26: Coin insertion into LAr calorimeter with a few mm clearanc

e.

Final cooling and excitation in May and June 2006

2004.2.27: celebrating the success of Solenoid-LAr docking

2004.3: piping and cabling works

2000.12.26 : Celebrating the success of full excitation 8400A at Toshiba

2004.7.5: Excitation test to 8136A at B180

CERN

2004.10.27: Transportation from

B180 to Point 1

2004.10.28: Descent from

SX1 to US15

2005.12: connection works on Control Dewar

Solenoid-v2, http://atlas.kek.jp/sub/poster/index.html

Solenoid-v2, http://atlas.kek.jp/sub/poster/index.html