Liquid Radiator Calorimeter Prototype Test for ATLAS at the CERN SPS

By Matthias Grosse Perdekamp
January 9, 2017

Two modules of a novel liquid radiator calorimeter were tested successfully using 30 and 150 A*GeV Pb-nuclei test beams at the Super Proton Synchrotron at CERN during the first two weeks of December. Liquid radiator calorimeters can be operated under very high radiation doses and NPL aims to develop technology for a new radiation hard Zero Degree Calorimeter for the ATLAS experiment at the Large Hadron Collider. The prototype modules use a two-step wavelength shifter system for light transport and Silicon Photomultipiers (SiPMs) for readout.

The prototypes were tested for their energy response and its dependence on the the impact position of the Pb-beam. The calorimeter prototypes were designed and built at NPL by graduate student Mike Phipps, undergraduate students Chad Lantz, Daniel Li, Anthony Oh, Aymen Shamoon, Joseph Bryant, technician John Blackburn and senior research engineer Eric Thorsland.
Detector assembly at CERN and setup of beam instrumentation and the readout was carried out by Eric Thorsland and graduate students Mike Phipps and Yakov Kulinich and postdoctoral researcher Vincent Andrieux.  The test beam data taking with the UIUC-NPL group was joined by Bian Cole from Columbia University, Peter Steinberg of Brookhaven National Laboratory and Zvi Citron from the Weizmann Institute of Science in Tel Aviv.