Liquid target system for New TPC experiment

•System•Target cell•Performance in test experiment•Plan for next experiment•Perspective

L.T. System

CFRP (1mm)

Target

~500 mm145 mm

40 mm

33 m

m

25mm

Kapton Cell

Target stage

Temperature sensor (Cernox)

Target Cell (Kapton 125 um)Nagai manufacturing Co.,Ltd.( www.nagai-mfg.co.jp )Plastic molding, etc.

Leak test (2 atm) using N2 gas.

Shielding

Operation

• 145 mm 　 long target cell

Filled gas with 1.35 atm using default preserver tank (120x6 litter)

• Temperature controll (Lake Shore)

set requested temperature

The heat voltage is controlled automatically.

17K15.8K

Test　 (Hydrogen)

For next experiment

100 mm longer

TargetCollimatorHole 31.7x24 mm

2 T

T=3 GeV, N=105, (x,y)=(8mm,4mm)

(In&Out&Upbar)No LH2 3 No buffer 11LH2 12

33x25 mm

Setup

(100)3 mm

Further

• Helium 4

The liquidized was achieved using copper cell at Suzuki co.

R&D for the target cell

Kapton Aramid, etc.