abbreviations

HERA

Hadron-Electron Ring Accelerator, a former particle accelerator at DESY

Acronym doesn’t need spelling out for the CERN Courier

High Energy Stereoscopic System, a system of imaging atmospheric Cherenkov telescopes investigating cosmic gamma rays, located in Namibia

Acronym doesn’t need spelling out for the CERN Courier

High-field magnets

High-Intensity and Energy ISOLDE

High-Luminosity LHC (also: HL-LHC)

High-radiation materials test facility

High-Luminosity Large Hadron Collider, High-Luminosity LHC (also: HiLumi)

Capital letters, note the hyphen.

The High-Luminosity LHC project (HL-LHC) will take the accelerator to new energy frontiers.

High-Momentum Particle Identification Detector

High-Power Superconducting Proton Linac

Hubble Space Telescope

Spell out in first use then use acronym for the CERN Courier