Göttingen 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

T: Fachverband Teilchenphysik

T 72: Detectors VII (Calorimeters)

T 72.2: Talk

Thursday, April 3, 2025, 16:30–16:45, VG 1.102

Fast Hadron Shower Simulation using the Discrete Cosine Transform with the CALICE AHCAL Prototype — •André Wilhahn, Zobeyer Ghafoor, and Stan Lai — II. Physikalisches Institut, Georg-August-Universität Göttingen, Deutschland

Extensive simulations of particle showers are crucial for high energy physics experiments, since they allow for a sensible interpretation of recorded calorimeter data. As many calorimeters are designed with increasing granularity, while having to cope with higher energy deposits and higher luminosity conditions, the accurate simulation of particle showers in a computationally efficient manner is of utmost importance. This talk describes preliminary investigations into a data-driven fast calorimeter simulation, based on compression algorithms, that is meant to describe particle showers accurately.

We start by investigating pion showers in the CALICE AHCAL (Analog Hadron Calorimeter) prototype, which is a highly granular hadronic calorimeter comprising a total of 38 active layers embedded in a stainless-steel absorber structure. Each active layer contains a grid of 24×24 scintillator tiles that are read out individually via silicon photomultipliers. The Discrete Cosine Transform is applied to hit energy distributions of test beam data, decomposing the distributions into distinctive cosine waves. By simulating the coefficients of these cosine waves, the goal is to develop a data-driven fast simulation with a reduced number of input values, but only limited information loss, and thus, being able to recreate energy distributions and preserving correlation factors between individual detector layers.

Keywords: Calorimeter; AHCAL; Simulation; Discrete Cosine Transform; Fast Cosine Transform