Available thin solenoids with dimensions of about 1 m f X 1 mL with field about 1 tesla in KEK/IPNS KEK/IPNS Y.Makida

2005/March/28

Introduction

• There are 2 available thin solenoid magnets in KEK/IPNS. • Both of them consists of a thin coil, LHe reservoir tank, radiation shield and honeycomb outer vacuum vessel.

• Both of them has developed for balloon borne experiment.

• There is one available thin coil, which is planning to be install into a cryo-cooler cooled cryostat.

Name

Thin solenoid magnets

PCMAG#3 Super JC PCMAG#4 Central Field 1.2

0.92

Current 520 580 Stored Energy Warm Bore Diameter Outer Diameter Effective Warm Bore L Weight Radiation length Coil thickness 640 852 1180 1000 430 0.2

7.2

370 852 1180 1000 423 <0.2

5.7

LHe tank / life Pre-cooling 250 L / 9 days 5 160 L / 5 days 5 tesla A kJ mm mm mm kg mm days

Thin solenoid magnets

Thin solenoid magnets automatic operation PT TT 1. Precooling Pressure Transmitter Temperature Transducer 2. LHe refill FM Mass Flow Meter 3. Magnet charge / discharge Control Valve PT Dewar Heater Power Source LHe dewar Special Transfer Line TT TT PCS Exhaustion Line Shield Line Current Lead Line PT FM FM DC Breaker Power Source Dump Resistor PCS Heater Power Source AUX Heater Power Source Recycle Line or Atmosphere Controller PC

Cryo-cooler cooled solenoid (plan)