Speaker
David Rivera
(University of Pennsylvania)
Description
The Short Baseline Neutrino (SBN) program at Fermilab will search for neutrino oscillations occurring over a 600m baseline with sensitivity to $\Delta m^2$ of order 1eV$^{2}$.
As the name implies, the Short Baseline Near Detector (SBND), will serve as the near detector for the SBN program and will constrain the systematic uncertainties for the oscillation search by sampling the unoscillated flux of neutrinos 110m from the beryllium target.
SBND will enable a sensitive test of the light sterile neutrino hypothesis, aiming either at an unambiguous discovery or a 5$\sigma$ exclusion of the area of 3+1 oscillation parameter space allowed by the LSND and MiniBooNE anomalies.
SBND is a Liquid Argon Time Projection Chamber (LAr-TPC) with more than 11 thousand channels of charge readout, a complementary Photon Detection System (PDS), and a Cosmic Ray Tagger (CRT).
SBND will rely on its triggering system to both reduce data transfer and storage needs and to provide summary information about detector activity in and out of beam spill.
The Photon Trigger Board (PTB) is at the heart of this triggering system and is in charge of driving the readout of the PDS as well as the TPC.
Access to the CRT, through the PTB, also makes it possible for SBND to trigger on activity uncorrelated with the beam e.g. from crossing muon candidates to aid in calibrating the detector.
The PTB itself, is a printed circuit board designed at the University of Pennsylvania and which hosts a System on a Chip (SoC) with an embedded Field Programmable Gate Array (FPGA).
In SBND, this SoC will allow for remote configuration of trigger definitions within the FPGA, and it will transfer subsystem information leading to each trigger decision directly to the data acquisition system to be stored as part of the overall event record.
Summary
Details about the triggering schemes for SBND and the overall design of the PTB are presented here.
Primary author
David Rivera
(University of Pennsylvania)
