Overview

The FDSi will bring multiple complementary detection modes together in a framework capable of performing decay spectroscopy with multiple radiation types over a range of beam production rates spanning ten orders of magnitude. 

Technical detail

At the core of the FDSi is a system that stops the incoming radioactive ions and detects subsequent charged-particle decay emissions. Additional detector arrays surround this system to measure emitted photons and/or neutrons. The specific configuration is adjustable to match the science goals of each experiment. The FDSi strongly relies on detectors and electronics available throughout the user community.

The primary detector systems include: (1) XSiSi – implant detector with segmented silicon and/or scintillator arrays; (2) DEGAi – 2π gamma array with HPGe Clovers and LaBr/CeBr; (3) NEXTi – 2π neutron time-of-flight array; (4) MTAS – modular total absorption spectrometer with one ton of NaI; (5) S3Heni – neutron counter with 3He tubes and two HPGe Clovers. 

Secondary detector systems include: (A) GADGET2 – time projection chamber; (B) 4π configuration of DEGAi; (C) OGS low-energy neutron detector array. 

See references below for additional detector contact information and guidelines on “primary” and “secondary” detector use. Presently, the FDSi is only supported on the fast beam line in the S1 vault. Phase 3 of the FDSi will bring support to the stopped beam line (FY25 or later).

Funding acknowledgement: The FDSi is supported by the user community with DOE and NSF funding and by DOE Office of Science under the FRIB Cooperative Agreement DE-SC0000661.

Reference

• The FRIB Decay Station Initiator – Guidelines