DCT trigger in a high-resolution test platform for the detection of very inclined showers in Pierre Auger surface detectors

0550933 - FZÚ 2022 RIV US eng J - Journal Article
Szadkowski, Z. … Total 2 authors
DCT trigger in a high-resolution test platform for the detection of very inclined showers in Pierre Auger surface detectors.
IEEE Transactions on Nuclear Science. Roč. 64, č. 6 (2017), s. 1282-1291. ISSN 0018-9499. E-ISSN 1558-1578
Research Infrastructure: AUGER-CZ - 90038
Keywords : Cyclone V * discrete cosine transform (DCT) * field-programmable gate array (FPGA)
OECD category: Particles and field physics
Impact factor: 1.440, year: 2017
Method of publishing: Limited access
https://doi.org/10.1109/TNS.2017.2655440

We present first results from a trigger based on the discrete cosine transform (DCT) operating in new front-end boards with a Cyclone V E field-programmable gate array (FPGA) deployed in seven test surface detectors in the Pierre Auger Test Array. The patterns of the ADC traces generated by very inclined showers (arriving at 70 degrees to 90 degrees from the vertical) were obtained from the Auger database and from the CORSIKA simulation package supported by the Auger OffLine event reconstruction platform that gives predicted digitized signal profiles. Simulations for many values of the initial cosmic ray angle of arrival, the shower initialization depth in the atmosphere, the type of particle, and its initial energy gave a boundary on the DCT coefficients used for the online pattern recognition in the FPGA. Preliminary results validated the approach used. We recorded several showers triggered by the DCT for 120 Msamples/s and 160 Msamples/s.
Permanent Link: http://hdl.handle.net/11104/0326228