H

HCAL: Hadronic Calorimeter

The purpose of the HCAL is to stop and measure the energy of hadrons and prevent them from travelling further through the detector. Like the ECAL, it is a sampling calorimeter made of layers of iron and plastic scintillator.

HLT: High Level Trigger

Software trigger. Software that decides if data from the detectore gets written to storage or thrown away.

HPD: Hybrid Photon Detectors

A vacuum photodetector consisting of a vacuum photon tube and a pixel silicon detector. HPDs were used in the original LHCb design (Runs 1 and 2). The radius of the HPD was 72 mm with 8192 pixels, that were combined into 1024 super-pixels, each 8 pixels size.

HS06

HEP-wide benchmark for measuring CPU performance based on the SPEC2006 benchmark.

HSF: HEP Software Foundation

The HSF facilitates coordination and common efforts in HEP software and computing internationally.

HTCondor

Formerly Condor. Backend for CERN's batch service. Use Condor backend in Ganga.