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

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

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

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)

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

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

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

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)

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

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

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

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