1. STEC2005 – Jan H. Hales – 8 th of April 2005 MEMS in Space Jan H. Hales jhh@mic.dtu.dk MIC – Department of Micro and Nanotechnology Technical University of Denmark, DTU Space Technology Education Conference 2005 Session 7: “ACDS and Orbit Control 2”

2. STEC2005 – Jan H. Hales – 8 th of April 2005 Micro Electro Mechanical System MEMS Integration of devices on micrometer scale based on IC batch processing Integration of devices on micrometer scale based on IC batch processing

3. STEC2005 – Jan H. Hales – 8 th of April 2005 Space Relevance Enhanced device performance by down- scaling Enhanced device performance by down- scaling Low mass and power consumption Low mass and power consumption Robustness and redundancy Robustness and redundancy Batch production – reducing device cost Batch production – reducing device cost

4. STEC2005 – Jan H. Hales – 8 th of April 2005 Space Applications Sensors/detectors Sensors/detectors Sun sensor Sun sensor Magnetometer Magnetometer Particle/radiation detector Particle/radiation detector Actuators Actuators Thrusters/micro valves Thrusters/micro valves Reaction wheels Reaction wheels Magnetotorquers Magnetotorquers Micro valves Micro valves Communication devices Communication devices Optical Optical RF RF Other Other Thermal control Thermal control Lab-on-a-Chip Lab-on-a-Chip

5. STEC2005 – Jan H. Hales – 8 th of April 2005 Projects at MIC Sun Sensor Sun Sensor Electron Emitter Electron Emitter Ion Thruster Ion Thruster Nano Environment Monitoring Unit Nano Environment Monitoring Unit(NEMU)

6. STEC2005 – Jan H. Hales – 8 th of April 2005 Sun Sensor  Two-Axis Triagular Slit Sensor  FOV ±70° (>55°), resolution 55°), resolution<0.1°  PCB size: 39mm  50mm  Sub System Mass: 7.1g  Power act./standby: 10mA/65µA

7. STEC2005 – Jan H. Hales – 8 th of April 2005 Sun Sensor on SSETI

8. STEC2005 – Jan H. Hales – 8 th of April 2005 Electron Emitter Electrons Silicon with spikes Gate E-field Oxide layer

9. STEC2005 – Jan H. Hales – 8 th of April 2005 Electric Propulsion Electro thermal Electro thermal Electromagnetic Electromagnetic Electrostatic Electrostatic Field Emission Electric Propulsion (FEEP) Field Emission Electric Propulsion (FEEP)

10. STEC2005 – Jan H. Hales – 8 th of April 2005 Ion Thruster - FEEP Design Goals Design Goals 100 times better than comparable thrusters 100 times better than comparable thrusters 1cm2 chip producing 1mN of thrust with a resolution of 3.9µN 1cm2 chip producing 1mN of thrust with a resolution of 3.9µN Integrated neutralizer Integrated neutralizer Applications Applications Charge control Charge control Station keeping Station keeping Fine pointing - formation flying Fine pointing - formation flying Main propulsion system Main propulsion system VaVaVaVa RhRhRhRh dededede

11. STEC2005 – Jan H. Hales – 8 th of April 2005 Ion Thruster - FEEP 200µm 8µm

12. STEC2005 – Jan H. Hales – 8 th of April 2005 Outlook Obtain a larger student involvement Obtain a larger student involvement Better packaged sun sensor Better packaged sun sensor Fabrication of final batch of e-emitters Fabrication of final batch of e-emitters Optimised version of Ion thruster Optimised version of Ion thruster Initiation of the NEMU project Initiation of the NEMU project

13. STEC2005 – Jan H. Hales – 8 th of April 2005 MEMS in Space Thank you for your attention Any questions?