真空辐射热循环实验地面模拟

Thermal Vacuum Chamber (NUV+VUV)

热真空辐射试验舱

（近紫外辐射/真空紫外辐射）

Brief Product Information

试验目的：

太阳紫外辐照影响暴露在航天器外表面的有机材料、高分子材料、光学材料、薄膜、粘合剂和涂层等材料，直接影响到航天器的寿命和可靠性。紫外辐照试验主要检验材料在空间环境中承受紫外辐照的能力，评价材料性能变化是否在设计所允许的范围内。由于紫外线对材料的损伤机理非常复杂，很难从理论上找到适用于材料性能退化的可靠普遍规律。还有材料的许多性能在真空中也有可能发生变异，热真空试验可以验证材料经受热真空环境的能力，检验其设计的合理性，暴露材料潜在缺陷。随着我国长寿命，高可靠航天器研制的需要，在航天材料的研究中，切实可行的方法就是对材料进行热真空试验和紫外辐射试验。

SimulTek can develop and build a Thermal Vacuum Chamber (NUV+VUV radiation source) according to your request and specifications.加拿大SimulTek公司设计开发了热真空辐射试验舱满足科学家对航天材料分析的需求。

Figure 1. Preliminary design of the TVC chamber

The TVC chamber（NUV+VUV）can be used to conduct Thermal Balance Tests, Thermal Cycle Tests, Thermal Shock Tests, irradiation Tests, and Burn-In Tests, in both vacuum and gaseous environments. The TVC chamber operation and thermal vacuum testing are performed in either manual or automatic mode.

热真空辐射试验舱可用于做热平衡试验，热循环试验和热冲击试验，紫外辐照试验以及老化试验。

The TVC chamber（NUV+VUV） generally includes the following subsystems and components:

热真空辐射试验舱功能组件如下：

- Stainless Steels 304 vacuum chamber with a support rack and 2 instrument racks;

304不锈钢真空室（附带设备固定架）

- vacuum pumping system; 快速真空抽气系统

- heating and cooling subsystems; 加热和冷却系统

-Thermal cycling capabilities 热循环试验功能

-NUV radiation source; 近紫外辐射源

-VUV radiation source; 真空紫外辐射源

- Sample Holder System (test rig); 进样系统

- temperature control system; 温度控制系统

- computer and electronic accessories;计算机及电路控制系统

- computer control and data acquisition software;计算机控制和数据采集软件

Features

:技术参数

•Internal volume容积: 0.5 m3

•Operating vacuum真空度: 10-8 torr

•Temperature range温度调节范围: +150°C to -150°C

•Heating rate升温速率: 可达50°C/min, cooling rate冷却速率: 可达30°C/min

•Uniformity温度均匀性: ±2°C

•Vacuum drop speed压力下降速度：可达8.0×10-6 Torr@16.7min，10-8 torr@1.5hour

•NUV radiation source , 0-10 Equivalent Suns 近紫外辐射源，0至10倍太阳紫外辐照强度, 光谱输出范围：180nm至2500nm，风冷

VUV radiation source; 真空紫外辐射源，连续光谱输出范围：115nm至400nm，风冷•Fully automatic control systems using PLC’s / PC-based operating systems

计算机全自动控制系统

•Data Acquisition Systems, including real time and historical trend analysis and alarming 数据采集系统：实时数据采集、历史数据趋势分析功能及报警功能

Temperature Control System

We use a special temperature control technology to achieve the specified heating and cooling rates (Heating rate: up to 50°C/min, Cooling rate: up to 30°C/min). These rates can be obtained in a specific

experiment configuration, on a small test sample and a limited size Hot/Cold Platform (not larger than 200×200 mm2).

Heating is provided by powerful vacuum-compatible IR heaters. The cooling system operates using Liquid Nitrogen, as this technology is traditionally used for thermal space environment simulation and we have an extensive experience with the cryogenic techniques. Both heating and cooling are provided with +/-2 degree accuracy within the required temperature change range. Temperature feedback is provided by several thermocouples installed inside the TVC chamber, on the Hot/Cold Platform, on the test rig, and on the sample under test. Any desired temperature within the range of +150°C to -150°C can be achieved and maintained by individual or simultaneous operation of IR lamps and Liquid Nitrogen shroud or Hot/Cold Platform. The temperature control unit, associated electronics and computer control program provide the required rate of temperature change to reach the setpoint temperature, as well as to hold the sample at this temperature for a desired period of time.

The thermal subsystem of our TVC（NUV+VUV） includes the following components:

- IR heaters (number of lamps - to be determined);

- sample-holder Hot/Cold Platform with heating/cooling capabilities;

- power supply for IR heaters and conduction heaters,

- electrical and thermocouple feedthroughs;

- temperature control unit and control thermocouples;

- cryogenic equipment (hoses, fittings, feedthroughs, valves, etc.); and

- computer control and data acquisition software.

Irradiation system

SimulTek will design and built a NUV system that will be adaptable to TVC （NUV+VUV）system and will be capable of delivering a NUV flux intensity of up to 10 Equivalent Suns (ES). SimulTek will design and built a VUV system that will be adaptable to TVC （NUV+VUV）system .

Vacuum System

The vacuum system of the TVC （NUV+VUV）consists of the following main parts:

- Stainless Steels vacuum chamber with a number of vacuum flanges (vacuum ports);

- fore-vacuum oil-free mechanical pump(s);

- turbomolecular or cryogenic pump(s);

- vacuum gauges;

- vacuum gauge controller; and

- other vacuum components.

Vacuum Pumping System