Argonne National Laboratory


Argonne’s Physics Division maintains and develops new instrumentation to enhance the capabilities of its facilities, most notably the Argonne Tandem Linear Accelerator System (ATLAS). Specific capabilities of different instrumentation components operated by the Physics Division are described below.

Argonne Gas-Filled Analyzer (AGFA)

AGFA is a state-of-the art gas-filled separator at ATLAS, which will be used for studies of heavy and superheavy nuclei as well as to prepare exotic radioactive beams for mass measurements and laser spectroscopy.

Argonne In-Flight Radioactive Ion Separator (AIRIS)

AIRIS, a system of selecting and purifying radioactive ion beams (RIB) created via the in-flight process, consists of a magnetic chicane separator and an RF sweeper.

Canadian Penning Trap (CPT)

The CPT is used to make precise mass measurements of nuclides available at the ATLAS facility.

Fragment Mass Analyzer (FMA)

The Fragment Mass Analyzer (FMA) is a recoil mass separator. It separates products of nuclear reactions from unreacted beams and disperses them according to their mass-to-charge state ratio (M/q).


Gammasphere is one of the world’s most powerful spectometers for nuclear structure research and is especially suited at collecting gamma-ray data following the fusion of heavy ions.


GRETINA is a new type of gamma-ray spectrometer used to study the structure and properties of atomic nuclei. It is built from large crystals of hyper-pure germanium and uses the recently developed concept of gamma-ray energy tracking.

Helical Orbit Spectrometer (HELIOS)

HELIOS is a charged-particle spectrometer designed to study reactions with radioactive ion beams. It offers excellent resolution, solid-angle acceptance and versatility, allowing its use in a broad range of experiments for nuclear structure determinations and nuclear astrophysics.