May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Forward Photon Measurements at the LHC and the FoCal Proposal in ALICE

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Future facilities, upgrades and instrumentation Poster Session


Norbert Novitzky (Helsinki Institute of Physics (FI))


A Forward Calorimeter (FoCal) is proposed as an addition to the ALICE experiment to be installed during Long Shutdown 3 (2024-2026).

The main goal of the FoCal proposal is to measure forward (3.5 < y < 5) direct photons in pp and p-Pb collisions to obtain unique experimental constraints on proton and nuclear PDFs in a new region of low x $(10^{-5} - 10^{-6})$. It provides measurements of neutral mesons, two particle correlations, and jets in p+p, p-Pb and (partially) in Pb-Pb collisions. The direct photon measurement requires a new electromagnetic calorimeter with extremely high granularity. We will discuss the physics case of this proposed detector. The design principle of the high-resolution silicon-tungsten (Si-W) sandwich calorimeter will be presented and results from the ongoing R&D program with test beams will be shown. The detector will be instrumented with Si-pad sensors with analog readout and on a Monolithic Active Pixel Sensor (MAPS) based digital pixel readout. The test beam results include linearity and energy resolution measurements, but also three-dimensional shower distributions on the sub-millimeter scale contributing to the excellent position resolution.

Collaboration ALICE
Content type Experiment
Centralised submission by Collaboration Presenter name already specified

Presentation materials