Typ

Konferenz-Proceedings

Gebiet

Detektorentwicklung

Autor

K. Desch, J. Kaminski, C. Krieger, M. Lupberger

Titel

Using an InGrid Detector to Search for Solar Chameleons with CAST

Datum

2015-09

Reportnummer

arXiv:1509.01418 [physics.ins-det]

Kurzfassung

We report on the construction, operation experience, and preliminary background measurements of an InGrid detector, i.e. a MicroMegas detector with CMOS pixel readout. The detector was mounted in the focal plane of the Abrixas X-Ray telescope at the CAST experiment at CERN. The detector is sensitive to soft X-Rays in a broad energy range (0.3--10 keV) and thus enables the search for solar chameleons. Smooth detector operation during CAST data taking in autumn 2014 has been achieved. Preliminary analysis of background data indicates a background rate of 1−5×10−5keV−1cm−2s−1 above 2 keV and ∼3×10−4keV−1cm−2s−1 around 1 keV. An expected limit of βγ≲5×1010 on the chameleon photon coupling is estimated in case of absence of an excess in solar tracking data. We also discuss the prospects for future operation of the detector.

Link

arXiv e-print 1509.01418