Commissioning of CMS Forward Hadron Calorimeters with Upgraded Multi-anode PMTs and {\mu}TCA Readout

TL;DR

This paper describes the successful upgrade and commissioning of the CMS Forward Hadron Calorimeter with multi-anode PMTs and {}TCA readout, enhancing data quality for high-energy physics experiments.

Contribution

It presents the implementation and commissioning of a new multi-anode PMT system and {}TCA electronics in the CMS Forward Hadron Calorimeter, improving performance for Run 2.

Findings

Successful upgrade of PMTs and readout system.

Improved data quality for 13 TeV analysis.

Effective commissioning and calibration procedures.

Abstract

The high flux of charged particles interacting with the CMS Forward Hadron Calorimeter PMT windows introduced a significant background for the trigger and offline data analysis. During Long Shutdown 1, all of the original PMTs were replaced with multi-anode, thin window photomultiplier tubes. At the same time, the back-end electronic readout system was upgraded to {\mu}TCA readout. The experience with commissioning and calibration of the Forward Hadron Calorimeter is described as well as the {\mu}TCA system. The upgrade was successful and provided quality data for Run 2 data-analysis at 13 TeV.