Model HE-3-SOSV-S Cryostat

Description:

The model HE-3-SOSV-S is a special optical cryostat. Optical windows with typical clear view size of 0.5" are installed on the vacuum shroud, as well as both the liquid nitrogen and liquid helium temperature radiation shields.

A special sample positioner with rotary/linear motion manipulator is installed at the top of the sample positioner so that the sample can be moved up and down, as well as rotated. OFHC copper braids are employed to provide the flexibilities of motion and rotation. A double optical sample holder is installed at the bottom of the sample positioner for reference and sample measurements.

This He-3 cryostat includes the following components:

·  Highly efficient liquid nitrogen shielded helium dewar

·  Liquid nitrogen temperature radiation with optical windows

·  Liquid helium temperature radiation with optical windows

·  1 K radiation shield

·  Charcoal sorption pumps with heaters and thermometers

·  1 K pots with thermometers

·  He-3 pots with heaters and thermometers

·  He-3 gas

·  Sample probe with rotary/linear motion manipulator

·  Sample mount with heater and thermometer

·  Operation test

Options:

·  Resistive wires

·  Coaxial cables

·  Automatic temperature controller

·  Helium level sensor and read out

·  Liquid helium transfer line

·  1 K pot pumping station

·  High vacuum pumping station

Performance Specification with two sets of 0.25" clear view quartz windows installed:

Sample Mount Base Temperature: / less than 350 mK
Holding Time at Base Temperature: / 24 hours minimum
Operation Temperature Range: / 0.35 K - 300 K
Typical Sample Space: / 1.5"
Sample Z-motion: / +/- 0.5"
Sample Rotation: / +/- 90 degree


He-3-SOSV-S型插件

He-3-SOSV-S型低温恒温器是一款特殊的光学实验恒温器。真空罩和液氮以及液氦辐射屏蔽罩上带有0.5英寸的光学窗口，可以线性移动和旋转的操作器安装于样品位置控制器的顶部，使得样品可以被方便的上下移动和旋转。使用OFHC同辩提供灵活的移动和转动。两个光学样品架安装在样品位置控制器的底部，用于样品间的对比和测试。

He-3-SOSV型低温恒温器带有通向手指状He-3冷却样品架的光学窗口，采用标准样品安装模式，样品放置在真空中。样品通常贴在位于制冷机真空室中的He-3 Pot的底部，真空室壁和热屏蔽罩上有光学窗口，通向样品的光路全在真空中(不穿过制冷剂)。

插件组成：
·  阻抗导线
·  同轴屏蔽线
·  温度自动控制器
·  液氦液面位置传感器和指示器
·  液氦传输管线
·  1K pot泵系统
·  高真空泵系统 / 可选项：
·  高效液氮屏蔽的液氦杜瓦
·  带有光学窗口的液氮温度辐射屏蔽罩
·  带有光学窗口的液氦温度辐射屏蔽罩
·  1K辐射屏蔽罩
·  带有加热器和温度计的炭吸附泵
·  带有温度计的1K Pot
·  带有加热器和温度计的He-3容器
·  He-3气体
·  带有可线性移动和转动样品操作器的样品探针
·  带有加热器和温度计的样品架
·  系统经过检验 / 基本指标：
（带两个0.25”石英窗口的系统）
·  样品架最低温度：<350mK
·  最低温度保持时间：>24小时
·  温度范围：0.35K-300K
·  典型的样品空间：1.5英寸
·  样品Z方向移动范围：+/-0.5英寸
·  样品转动范围：+/-90度

He-3-SOSV-S /
He-3-SOSV-S机械图