Preparation before the launch.

Student experiment reached the edge of space

The instrument didn’t break, was recovered and now is time to analyze the data. It was a successful rocket ride for the REXUS experiment Salacia. – We will now analyze the data and hope to lay a foundation for future trips to Mars, says Daniel Nilsson, Space Engineering student at Luleå University of Technology.

 The countdown starts two hours before the scheduled time for launch. Some of the students involved in the project for the experiment SALACIA, are allowed to follow the adventure from inside the control room at the rocket range Esrange.

– When there are 20 minutes left to lift off the door closes and no one may leave the control room – at that time you feel that it is for real and really exciting, says Elias Krantz, Space Engineering student and project manager for SALACIA.

SALACIA is designed and built by Space Engineering students at Luleå University of Technology. The goal is to examine how perchlorate salts behaves during a rocket launch. The project is hence something of a feasibility study to the instrument HABIT – developed by researchers at Luleå University of Technology – and eventually going to Mars.

– The REXUS project is a great way for the students to showcase their talent for the space industry and to promote growth in the space sector here in Kiruna, said Johanna Bergström-Roos, project manager for RIT.

Rocket towards space

SALACIA (Saline Liquids and Conductivity in the Atmosphere) consists of four containers with salts that hydrated during the rocket ride into space, that is: reacted with water. The aim is to examine how the salts hydrates in relation to the composition of the atmosphere; humidity, temperature and pressure.

It took the sounding rocket just over two minutes to reach the trip’s maximum height of 86 kilometers. The experiment’s salt containers were filmed during the rocket ride, and the film clearly shows how the salts and the instrument response and is affected by different phases of the journey. For example, you can see how the salts react when the rocket reaches weightlessness and how the instrument shakes when the engine seperates from the rest of the rocket.

– We do not measure the exact amount of water that the perchlorates absorb. Instead we watch the phase transitions and how they react during the trip, says Elias Krantz.

Thrilling experience

SALACIA was one out of four experiments that were part of the rocket’s payload. When the payload was retrieved the students could conclude that the experiment survived unscathed despite the precarious parachute ride to the ground. The Space Engineering student Frej Emmoth, who mainly worked with the instrument’s electronics, was pleased.

– You can do lots of tests but still be nervous about whether it will break or not. We have been working with the instrument for one and a half years so a lot of time is spent on the result. But despite all the time devoted to the project, it is undoubtedly the most awarding thing I’ve done during my training, says Frej Emmoth and is backed by Daniel Nilsson.

– It has been rewarding to apply practically all what we have learned in theory, says Daniel Nilsson.

Now the collected data are to be fully analyzed. The results will be presented in June at a symposium on rockets and high altitude balloons organized by ESA, the European Space Agency.

The project Rexus (Rocket Experiments for University Students) aims to provide space students the opportunity of experimental experience. The programme is developed by the Swedish National Space Board and German Aerospace Center (DLR).