Beams

FRIB offers fast, stopped, and reaccelerated rare-isotope beams from the FRIB linear accelerator (linac). Rare-isotope beams are produced from a primary beam that impinges on a target. In addition, FRIB offers stable and long-lived radioactive beams that may be run at ReA3, ReA6, or the stopped beam area in stand-alone mode (that is, not coupled to the FRIB linac).

Primary beams will be added as needed to meet user demands. Planned additions based on user rare isotope beam needs are listed as being developed next.

Please contact the Manager for User Relations for new beam requests.

FRIB primary beams

Available (updated 6 December 2023)

*pps = pnA x 6.25 x 10⁹
pps = particles per second
pnA = particle nanoampere

Being developed next (updated 6 December 2023)

Rare isotope beam rates

Rare isotope beam rates used in proposals must be calculated by an FRIB beam physicist. Please contact the FRIB Manager for User Relations with the isotope for which you would like the rate and purity calculated. The Manager for User Relations will make the request to the FRIB beam physics group. An approximate estimate can be obtained from the calculator.

For further information on how rates are calculated, please review this tutorial: LISE++ tutorial: Making 64Cr (PDF)

Beam list for stand-alone operation at ReA3, ReA6, or Stopped Beam Area

The PDF list below includes stable and long-lived radioactive beams that may be run at ReA3, ReA6, or the stopped beam area in stand-alone mode (that is, not coupled to the FRIB linac).

Please note that beams of long-lived and rare stable isotopes are subject to availability of material at the time of the experiment.

ReA3, ReA6, stopped beam area list of beams (PDF)