ABOUT SRON

Netherlands Institute for Space Research

ABOUT SRON

ABOUT SRON

Netherlands Institute for Space Research

QUICK LINKS

                                                                                                                                             

Working at SRON

SRON has about 200 employees. They form a melting pot of top (instrument) scientists, engineers, and other professionals of various nationalities and ages who inspire each other to realize outstanding performances at a top level. Problems faced by scientists challenge sensor developers to construct increasingly more sensitive technology. Together with mechanical and electronic engineers they ultimately develop a scientific space instrument with an exceptional level of performance under the extreme conditions of space. The scientific breakthroughs made with such devices in turn inspire new research and new technology. This approach has enabled SRON to develop into a national expertise institute of international repute.

SRON is a part of the Netherlands Organisation for Scientific Research (NWO). The institute has two locations, at the university complexes of Utrecht and Groningen. About 3/4 of the employees is located in Utrecht. More than 2/3 of the total staff has a scientific degree. Employees can have a tenured or temporary contract or work on a project basis. SRON combines a professional approach with an informal work climate in an international environment. SRON offers excellent terms of employment, as shown at the bottom of this page.

Interships & graduation projects

Doing an internship or graduation project at SRON means that you are involved in exploring and pushing boundaries. Various disciplines meet at SRON. Highly motivated specialists from all over the world work together in a mix of science and technology. Within all groups at SRON we have continuously opportunities for internships and graduation projects. Please see below for current examples. University students in e.g. astronomy, physics, Earth sciences, and engineering, as well as HBO students in related disciplines are all cordially invited to contact us. We have two central points of contact for further info and for formalising your internship or graduation project:

For University students: Please contact our HR department: This email address is being protected from spambots. You need JavaScript enabled to view it.. We will contact responsible scientists in three disciplines: instrument science including space sensors (Dr. Jian-Rong Gao for Utrecht and Dr. Gert de Lange for Groningen), astrophysics (Dr. Lucien Kuiper), and Earth sciences (Prof. Ilse Aben).

For HBO students: Please contact Dr. Jian-Rong Gao (coordinator internships): This email address is being protected from spambots. You need JavaScript enabled to view it., tel. +31 88 777 5710.

Limited financial support (a reimbursement) may be available at SRON for students who are registered at a Dutch university or a university within the EU. For the details, please contact our HR department: This email address is being protected from spambots. You need JavaScript enabled to view it..

 

 

sto-2-celebration.jpeg
The STO-2 mission team celebrates a successful final test at Antarctica.

Current vacancies

Current vacancies are listed below, together with a status indicator:

  • 1 means you are welcome to apply
  • 2 means you are welcome to apply, but selection is already in progress
  • 3 means that the selection process has almost been completed.

Please send your application (motivation letter with CV and vacancy number) to This email address is being protected from spambots. You need JavaScript enabled to view it.. You can help us by telling us where you initially saw the advertisement for the position you apply for.

Examples of internships & graduation projects

 

xianing_yan_2.jpg
 
Elisa-Costantini-003.jpg
 
hs_4_gert_de_lange008.jpg
 
hs_6_pourya_khosropanah008.jpg
 
Lingyu_Wang_0352.jpg
 
dieleman004a.jpg
 

High-Resolution X-Ray Spectroscopy

Description: High-resolution X-ray spectroscopy of hot plasmas, such as found in active galactic nuclei, clusters of galaxies and stars, and study of the interstellar medium as seen through X-rays. The project makes use of data taken with the three large X-ray observatories currently operational, Chandra, XMM-Newton and Suzaku, plus archival data from previous missions. Modeling is also done in preparation for future X-ray missions, like Astro-H and Athena.

Approach: data analysis, interpretative and/or theoretical.
Contact: dr. J.S. Kaastra (This email address is being protected from spambots. You need JavaScript enabled to view it.), dr. A.J.J. Raassen (This email address is being protected from spambots. You need JavaScript enabled to view it.), dr. E. Costantini (This email address is being protected from spambots. You need JavaScript enabled to view it.), dr. C.P. de Vries (This email address is being protected from spambots. You need JavaScript enabled to view it.)

High-Energy Astrophysics of Compact Objects

Description: Study of the high-energy X-ray and gamma-ray properties of neutron stars like rotation-powered (radio) pulsars as well as the extremely magnetized magnetars. A large X-ray/gamma-ray data base is available from the operational INTEGRAL satellite (launched Oct. 2002), as well as X-ray data from XMM-Newton, Chandra, Rossi-XTE, Swift, Suzaku and high-energy gamma-ray data from Fermi. These can be exploited to study the timing, temporal and spectral characteristics of these compact objects.
This internship can be done both on bachelor's level and master's level.

Approach: data analysis, interpretative and/or theoretical.
Contact: dr. L.M. Kuiper (This email address is being protected from spambots. You need JavaScript enabled to view it.), prof.dr. W. Hermsen (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Understanding the Nature of Cosmic X-Ray Transients

Description: Since their discovery over 30 years ago, thermonuclear flashes have been detected from the surfaces of over 80 neutron stars in the Galaxy. Thanks to recent better instrumentation, peculiar kinds of flashes are being picked with energy outputs of up 1000 times that of 'ordinary' flashes. These peculiar flashes are potential probes of the neutron star interior, which harbors the densest matter in the visible universe with nucleonic densities at macroscopic scales. The study of this matter may provide tests of the strong interaction (Quantum Chromo Dynamics) under conditions that are impossible to create on Earth (high density, 'low' temperature). SRON pursues the study of flashes, through preparation of future missions, observations with the current fleet of X-ray observatories (Rossi-XTE, XMM-Newton, Chandra, Swift, INTEGRAL and HETE-II), analysis of archival data from terminated observatories (BeppoSAX, EXOSAT), and theoretical studies. This internship can be done both on bachelor's level and master's level.

Approach: data analysis, interpretation, theory.
Contact: dr. J.J.M. in 't Zand (This email address is being protected from spambots. You need JavaScript enabled to view it.), prof. J. Heise (This email address is being protected from spambots. You need JavaScript enabled to view it.)

TES and readout research in Cryo-U and Litho sections

The instrument scientists in both Cryo-U and Litho sections in Utrecht are working on developing transition edge sensors (TES), which consist of a superconducting temperature sensing element, absorber, and thermal links to the constant temperature surrounding. TES that operate by measuring the heating of a sensing element due to absorbed radiation form the basis of the most versatile and sensitive detectors available to astronomers. When combined with an appropriate radiation-coupling scheme, they can detect light from the millimeter-wave radiation to X-rays through the entire electro-magnetic radiation spectrum.

Additionally, we are also working on frequency domain multiplexing (FDM) scheme to read out many TES pixels simultaneously. In essence, applying the FDM is to form a TES camera with so many pixels that work equivalently to a CCD camera seen in your smart phone nowadays. A TES camera however is for different wavelengths and furthermore has unprecedented sensitivity or the energy (or spectral) resolution. SRON is developing TES and FDM technologies for two next-generation astronomic space observatories: ATHENA (Advanced Telescope for High Energy Astrophysics) by detecting X-rays and SPICA (Space Infrared Telescope for Cosmology and Astrophysics) by detecting Far Infrared radiation.

Under these two huge projects, we have a number of subjects that are very suitable for a university MSc student to do the graduation research for a period of either 6 or 9 months. The subjects can range from the fabrication, modeling, and experimental characterization of TES detectors, superconducting LC filter structures or even a particular FDM unit. We usually prepare a research plan for you based on the needs of the projects and also the desire and strength of the student. That the outcome of a graduation project can later be applied for a space mission must be a dream of many students.

The most instrument scientists have obtained their Ph.D degrees either in physics or electric engineering, and some of them are the leading experts in their research field. So, they have sufficient experience and knowledge to guide the student through the project. As an example, you are referred to a successful student project: that can be found here. As one of the leading space institutes in the world, we have also excellent cryogenic testing and clean-room fabrication facilities. Furthermore, limited financial supports may be available at SRON for the student who is registered in a Dutch university or a university within EU, regardless their nationality.

Contact: If you are interested in doing your MSc graduation project on the above topics, please contact Dr. Jian-Rong Gao, senior instrument scientist and also head of Section Cryo-U (This email address is being protected from spambots. You need JavaScript enabled to view it., tel. +31 88 777 5710)

Aansturing van een cryotron

Een cryotron is een set van supergeleidende spoelen waarmee energie op 4 K kan worden opgeslagen. M.b.v. inductieve koppeling en aansturing van heatswitches kun je deze energie in de supergeleidende spoel opslaan en er ook uit  halen en gebruiken voor b.v. de aansturing van de chopper motor of een magneet om een gedeelte van de FTS te laten zweven in een 1g veld. Groot voordeel van een cryotron is dat je door hele dunne draadjes (die b.v. maar een stroom kunnen voeren van 10 mA) stapsgewijs energie op kunt slaan op 4 K, en dan uit het cryotron een veel grotere stroom zou kunnen trekken door supergeleidende draden (20 A b.v.). Dat heeft dan weer voordelen voor de parasitaire warmtebelasting van de koude stage van je cryostaat. De aansturing zou bestaan uit de uitlezing van een Hall sensor en logica om a.h.v. stroom en magneetvelduitlezing heatswitches (koude weerstanden waar een stroom doorheen gestuurd wordt zodat ze opwarmen).

Contact: dr. Ir. Gert de Lange, instrument scientist (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Metingen aan supergeleidende circuits

Metingen aan supergeleidende LC filters in combinatie met supergeleidende TES, Schottky, of SIS diodes. Feasibility study aan het conversie en ruisgedrag van supergeleidende filters en devices.

Contact: dr. Ir. Gert de Lange, instrument scientist (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Checkbox ontwerp

Ontwikkeling van ESD safe checkbox voor kamertemperatuur check van LC cryostaat bedrading. Dit is een doosje met een x-standenschakelaar waarmee we snel en veilig kunnen bepalen of alle aansluitingen van de cryostaat correct zijn voordat we gaan afkoelen (en evt. op 4 K). Dit gebeurt nu m.b.v. break-out boxen en bananenstekkers, maar in het nieuwe MUXboard hebben we voorzieningen getroffen dat we dit m.b.v. van 1 stekker en een handig kastje kunnen doen. Dergelijke kastjes hebben we veel gebruikt voor HIFI en een nieuw kastje zou op basis van dat ontwerp kunnen, evt. aangepast aan de stromen en spanningen die we in de LC koeler nodig hebben. Heino heeft hier voor HIFI al veel mee gewerkt.

Contact: dr. Ir. Gert de Lange, instrument scientist (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Ontwikkeling van TES biasing en read-out

Deze read-out kan spanning of stroom aansturen en stroom/spanning meten. Voor de DC aansturing van de TES maken we nu gebruik van de Magnicon. Als we de Magnicon voor 2-stage SQUID's gaan gebruiken, vervalt de mogelijkheid om de TES aan te sturen. We kunnen dan gebruik maken van de bias-elektronica die destijds voor HIFI is ontwikkeld (Hans Golstein, Heino Smit). Dit zijn goed uitontwikkelde stukken elektronica die ESD veilig en zonder groundloops (opto-couplers) de SIS devices hebben aangestuurd. Om deze voor de TES te gebruiken moeten de voltage en current ranges worden aangepast. Verder zou het heel handig zijn om niet een stroom/spanning read-out te hebben, maar b.v een stroom*spanning (power) vs spanning, of een stroom*spanning (power) vs spanning/stroom (weerstand) die je rechtstreeks op de scoop zou kunnen zetten (kun je denk ik wel doen met op-amp schakeling).

Contact: dr. Ir. Gert de Lange, instrument scientist (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Gedrag van sensoren op cryogene temperaturen

In verschillende test set-ups is het noodzakelijk om te controleren of mechatronische system doen wat ze moeten doen. De opstellingen in cryostaten hebben geen zicht naar binnen en zijn er sensoren nodig om te meten wat er in de cryostaten gebeurt. Commerciële sensoren zijn zelden gespecificeerd voor de lage temperaturen in een cryostaat (4K). Hiervoor moeten ofwel bestaande commercieel verkrijgbare sensoren worden getest onder deze omstandigheden, ofwel nieuwe sensoren worden gebouwd voor deze temperaturen. Dit betref een stage op HBO-niveau.

Contact: ing. Ron Linde, sectiehoofd Engineering Groningen (This email address is being protected from spambots. You need JavaScript enabled to view it., +31 614505668)

 



SCROLL TO TOP