精品1_亚洲第一综合_午夜精品久久久久久毛片_精品国产一区二区三区成人影院_中文字幕免费播放_亚洲精品一区二区三区在线看

From Hannover around the world and to the Mars: LZH delivers laser for ExoMars 2020

source:LZH

  release:Johnny

keywords: LZH laser

Time:2017-11-21

 

In three years, the rocket of the European-Russian ExoMars 2020 mission shall start its nine-month journey to Mars, together with a rover and surface platform. The flight model of the MOMA laser has reached the first milestone: the Laser Zentrum Hannover e.V. LZH has delivered the laser head to the NASA Goddard Space Flight Center, USA.
Small laser on a long journey. The laser developed by the LZH will be used in the ExoMars 2020 mission's rover to search for life on Mars. (Graphic: ESA)
 
A major goal of the ExoMars mission is to search for past or present life on the Earth-like planet. One of the most important analytical instruments of the EXOMARS rover is the "Mars Organic Molecule Analyzer", MOMA for short. This is being developed together with further partners under the leadership of the Max Planck Institute for Solar System Research (MPS), Göttingen, Germany. The MOMA laser model, which has been delivered to the NASA Goddard Space Flight Center, is part of the Laser Desorption Mass Spectrometer (LD-MS) developed there. On Mars, it can identify and analyze organic matter. Organic molecules in the soil samples taken in situ could provide clues to possible forms of life.
 
Small, light and robust
In the past few years, the LZH has developed the diode-pumped solid-state laser head in the UV spectral range required for the investigations. The laser has an emission wavelength of 266 nm and an adjustable laser pulse energy of up to 130 μJ. Its most important unique features, however, are weight, size and robustness. With a length of about 20 cm it has a weight of only about 220 g. In addition, the laser head has to be pretty robust in order to function properly on Mars: Mechanical shocks during the launch of the rocket and during the landing on Mars and very large temperature differences. On the other hand, the laser optics used must withstand both the UV radiation of the laser and the ionizing cosmic radiation. The optics with space-qualified optical coatings were provided by the Laseroptik GmbH and evaluated at the LZH.
Elaborate and tight cable routing: The MOMA laser without laser sheath on the exit side. (Photo: LZH)
 
Optimally adapted to harsh conditions
"The laser is optimally adapted to the harsh environmental conditions in space and its mission on Mars," explains Dr. Peter Weßels, Head of the Solid-State Lasers Group at the LZH. "We use a passively Q-switched Nd:YAG oscillator pumped longitudinally over an optical fiber. The infrared light of the oscillator is converted into ultraviolet radiation using nonlinear crystals. A temperature control is to ensure the function even with changing ambient temperature and also allows to flexibly adjust the output pulse energy."
Integration of the MOMA laser into the mass spectrometer model of the NASA Goddard Space Flight Center. (Photo: LZH)
 
Before delivery of the model aircraft to NASA, the laser head was thoroughly tested at the MPS in Göttingen. Currently, it is being integrated into the mass spectrometer at the Goddard Space Flight Center and tested again. It then has to pass environmental tests again with NASA's MS before being re-integrated into the Rover back in Europe.
 
The project is being funded by the Space Agency of the German Aerospace Center with funds from the Federal Ministry of Economics and Technology on the basis of a decision by the German Bundestag under the funding reference numbers 50QX1002 and 50QX1402.
主站蜘蛛池模板: 国产有码aaaae毛片视频 | 蜜桃久久av| 国产99视频精品免视看9 | 久久久国产精品入口麻豆 | 国产精品免费在线播放 | 美国成人毛片 | 一区久久 | 美国三级日本三级久久99 | 久热久| 欧美色图亚洲自拍 | 国产精品成人自拍 | 另类激情视频 | 国产精品视频一区二区三区不卡 | 国产视频二区 | 精品国产不卡一区二区三区 | 久久精品视频播放 | 天天操天天碰 | 亚洲三级不卡 | 国产精品日韩在线观看 | 17婷婷久久www | 亚洲精品99 | 人妖啪啪综合av一区ts人妖 | 欧美日韩三区 | 精品午夜一区二区 | 91在线视频导航 | 日韩国产中文字幕 | 免费一级片 | 国产伦精品一区二区三区精品视频 | 精品久久久久久久久久久久久久久 | 免费a网 | 麻豆一区 | 亚洲 成人 在线 | 成人国产精品久久久按摩 | 91精品久久久久久久久青青 | 免费精品视频 | 欧美成人激情 | 国产成人网 | 国产三级在线播放 | 三区在线 | 一区二区国产精品 | 亚洲欧美日本另类 |