First results from the SPI imaging test setup

Details First results from the SPI imaging test setup First results from the SPI imaging test setup

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..639w&link_type=abstract

In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:

Physics

Integral, Spi, Coded Mask Imaging

Scientific paper

The SPI Imaging Test Setup (SPITS) was built for experimental verification of the imaging properties of SPI. SPITS provides the possibility to validate simulations - needed for SPI image reconstruction - with laboratory measurements. SPITS consists of a coded mask and two germanium detectors, no anticoincidence system is used. The mask has the same tungsten-alloy HURA coding as SPI. The two hexagonal Ge-detectors are housed in a common Al end cap. They can be moved to cover the 19 SPI Ge-dector positions. Mask and germanium detectors are made of SPI-FM materials. The imaging properties of SPITS are being measured with radioactive sources 9 m from the detector plane. We obtain an angular resolution of about 2° at 1.8 MeV and a point-source location capability of SPITS of 15' at 1.2 MeV, both for strong sources.

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