INTEGRAL (The International Gamma-Ray Astrophysics Laboratory) is a high resolution spectroscopy, high angular resolution imaging mission of ESA.

The Joint European X-Ray Monitor (JEM-X) is one of the three main instruments and plays a crucial role in the detection and identification of the gamma-ray sources as well as in the analysis and scientific interpretation of Integral gamma-ray data.

Oxford Instruments Analytical Oy designed and manufactured the mechanical construction of the detector.

The photon detection system consists of two identical imaging Micro-Strip Gas Chambers (MSGC). Each detector unit views the sky through its coded aperture mask located at a distance of 3.4 m above the focal plane. In the MSGC detectors the wire electrodes of conventional multi-wire proportional counters are replaced by a thin metal stripe pattern. In the JEM-X the anode strips are only 0.01 mm wide.

The JEM-X detector has a sensitive area of 500 cm2 .The detector gas is Xenon at 1.5 bar pressure. A part of the detector electronics, like the front-end amplifiers, is placed inside the gas chamber.

JEM-X was built under the leadership of the Danish Space Research Institute.  The Finnish participation for JEM-X was organised by the University of Helsinki.

INTEGRAL was successfully launched on October 17, 2002 and is still operational.


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HU INTEGRAL Project (Linnkin kohdetta ei enää löydy)