A NEW TYPE OF LIQUID-HE-3 TARGET SYSTEM USING SMALL MECHANICAL REFRIGERATORS

被引：10

作者：

KATO, S

KOBAYASHI, K

MARUYAMA, K

OKUNO, H

KONNO, O

SUDA, T

MAKI, T

ASAMI, H

KOIZUMI, T

机构：

[1] TOHOKU UNIV,NUCL SCI LAB,SENDAI,MIYAGI 982,JAPAN

[2] TOHOKU UNIV,COLL GEN EDUC,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

[3] UNIV OCCUPAT & ENVIRONM HLTH,KITAKYUSHU,FUKUOKA 807,JAPAN

[4] SUMITOMO HEAVY IND LTD,TANASHI,TOKYO 188,JAPAN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1991年 / 307卷 / 2-3期

关键词：

D O I：

10.1016/0168-9002(91)90185-S

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A new type of liquid- He-3 target has been developed for photoabsorption experiments at intermediate energies. Using the cooling power of liquid He-4 at reduced vapour pressure, He-3 gas is luquefied into a cylindrical target cell of 180 ml and is maintained at 2.0 K during the experiment. Evaporated He-4 gas is evacuated by a rotary pump and returned into the He-4 bath in the cryostat, where two small mechanical refrigerators with cooling capacities of 3 W at 4.3 K and 10 W at 20 K are operated for the purpose of He-4 recondensation. A maintenance-free operation of more than 1000 hours has become possible by adopting the He-4 circulation system.

引用

页码：213 / 219

页数：7

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