Speaker
Description
The ATLAS detector, a state-of-the-art particle detector, is uniquely situated
100 meters below the earth’s surface in the tunnel of the Large Hadron
Collider (LHC), extends 44 meters in length and 25 meters in height with an
estimated mass of 7000 tons, and provides 4π coverage in solid angle due to
its symmetric cylindrical design.
By 2029, the luminosity is expected to increase significantly, creating a
challenge due to the occurrence of pile-up - a phenomenon where multiple
collisions occur simultaneously with the primary collision of interest.
To address this, the High Granularity Timing Detector (HGTD) will be integrated
into the ATLAS detector. This addition will cover a pseudorapidity
range between 2.4 and 4.0 and is designed to provide a time resolution per
track of 30 ps for minimum-ionizing particles, which degrades to 50 ps towards
the end of HL-LHC operations. The upgrade will mitigate the adverse
effects of the pile-up and improve the reconstruction of forward objects. Furthermore,
HGTD provides exceptional capabilities for making measurements
of the luminosity, a key factor for precision physics measurements.
This presentation delves into the intricacies of monitoring three essential
components in the HGTD DAQ chain: the ALTIROC2, the lpGBT and
the VTRx+. Effective monitoring of these components is crucial to guarantee
operations, especially in light of voltage fluctuations that can adversely
impact the detector’s performance. The ADC of the lpGBT is utilized
for both the monitoring of the ALTIROC2, consisting of measurements
across various voltage levels such as Vgrnd, Vddd, Vdda. Furthermore,
the use of the ADC in the monitoring of the ALTIROC2 and the lpGBT ensures
proper conversion from analog to digital signals. Special emphasis is
also placed on monitoring the internal temperature sensors of the
ALTIROC2, the lpGBT and the VTRx+.
