1. Brief Introduction
In meeting the national strategic requirements on high reliable and long life spacecrafts, to support the research and development of space products, devices and materials, seeking after the frontier of space science and technology, SEELab focuses on space environment effects (SEE) of devices and materials, which result from harsh radiation particles, intense plasma, hyper velocity micro debris, erosive atomic oxygen, etc. The main research objective for SEE is to disclose the interaction mechanism, develop evaluation methods, as well as investigate protection principles. Applying the research achievements, SEELab also performs test, evaluation and protection design on SEE for customers involved in satellite system, payloads, devices, and materials.

2. Main Research Areas
The space environment effects threatening spacecraft safety and reliability can be cataloged as radiation effects like total ionizing dose effect, displacement damage effect and single event effects, surface and internal or deep charging and discharging, exposed damage by atomic erosion and micro debris impact. The main research areas on SEE in SEELab are established as follows:

　  (1) Study the mechanism of SEE on devices and materials to provide theoretical basis for design of advanced devices, materials and high reliable and long life space products suitable to harsh space environment.

　  (2) Develop experimental simulation techniques and analysis methods on SEE to give technical support to space environment suitability test and evaluation for devices, materials and space products.

　  (3) Investigate principles of protection from SEE to support the design and accomplishment on harsh space environment tolerance for advanced devices, materials and space products.

3. Main Achievements

(1) Development of analysis methods and evaluation softwares for SEE

Apart from applying widely accepted space environment models rightly, some models such as near-space neutron environment are developed independently. Various analysis methods have been applied and established involving total ionizing dose effect, single event effects, displacement damage, solar cell radiation damage, equivalent radiation dose for astronaut, surface and internal charging, atomic oxygen erosion, etc. Space Environment Effects Analysis Package (SEEAP) for evaluation of spacecraft’s external and internal environments and their effects on devices and materials has been constructed. Moreover, analysis and design tools of three dimensional shielding for protection of onboard equipments from radiation have been constructed.

(2) Construction of simulation facilities and associated experimental technologies for SEE
The first independent Pulsed Laser Single Event Effects Facility (PLSEE) has been setup since 2006 in SEELab, which is capable of test on single event effects with equivalent LET up to 200 MeV.cm2/mg, and has special advantage on spatial and temporal scanning of chips’ response to single event effects. PLSEE can be widely applied in single event effects sensitivity evaluation for device selection, verification of countermeasures against single event effects in system and circuit level, and evaluation of radiation hardness design on chips as well. The recently developed Space Particulate Impact Facility (SPIF) based on plasma acceleration technology can launch particulates of hundreds of micrometers up to velocity of 15km/s for simulation on micro space debris impact. The distinctive Satellite Deep Charging &Discharging Simulator (DECDIS) was setup to study the deep dielectric charging and discharging phenomena, which is capable of simulating high energetic electron environment with successive energy distribution up to 2.28 MeV for MEO and GEO. The Space Plasma Simulation Facility (SPLASF) can simulate space plasma, low energy ion and electron environment to investigate surface charging and discharging effect.

(3) High quality services on SEE test, evaluation and protection design
SEELab has been performing SEE test, evaluation and protection design for almost all of the domestic units on space products and the major units on space devices. Applying the PLSEE facility, the onboard abnormal of “XX-1” satellite was replicated on ground within only 48 hours, which was critical for the abnormal decision and countermeasure. The PLSEE facility was also used to investigate the single event effects and transient radiation response for certain domestically developed hardened device. For investigating the serious malfunctions of “XX” satellite, a series of deep dielectric charging experiments were conducted. Furthermore, evaluation and protection design on SEE were provided for satellite of China-Europe Collaborated “Galileo Project”, and the companion satellite of “Shenzhou 7” spaceship, etc.

(4) Breakthroughs on space environment effect application technology
The prototypes of stick and reflecting panel style plasma antenna have been developed successively, which can be widely applied in various information technology fields.

4. Exchange and Collaboration
With the achievements in single event effects observation using pulsed laser, study of single event transient, investigation of displacement damage, research on deep dielectric charging and discharging, simulation on synergistic effect of space micro debris and atomic oxygen, various means of international exchange are in proceeding.
With excellent research & development abilities and plentiful achievements, cooperation with nearly all of domestic units on space products and major units on space devices has been established, and number of service on test, evaluation and protection design for SEE has been carried out. Especially, for the advantaged application of PLSEE facility, several units intend to ask SEELab to develop such kind of facilities for them.