The primary method of obtaining beamtime is through the CHRNS proposal system. Calls for Proposals are issued approximately twice a year. (Other methods of obtaining beamtime are also available)
Statistics from previous proposal rounds
The system functions through written reviews of proposals by expert referees. Normally, several reviews are sought for each proposal, using referees chosen by NIST staff. In addition, CHRNS scientists carry out reviews for safety and technical feasibility.
After satisfactory reviews have been obtained, the CHRNS Beam Time Allocation Committee (BTAC) rank-orders the proposals and assigns the amount of beam time to be allocated to each successful proposal for each experimental station. The BTAC meets twice a year to do this. The actual scheduling of experiments is carried out by CHRNS staff. The BTAC has primary responsibility for proposal review, and provides advice to NIST and CHRNS management on all aspects of facility operation.
The current BTAC membership is:
The instruments available to guest researchers through the CHRNS proposal system are as follows:
|CHRNS High-Flux Backscattering Spectrometer (HFBS)|
|CHRNS Neutron Spin-Echo Spectrometer (NSE)|
|CHRNS Multi-Axis Crystal Spectrometer (MACS)|
|CHRNS Very Small-Angle Neutron Scattering (vSANS)|
|CHRNS White-Beam Reflectometer (CANDOR)|
|Other Instruments offered by NIST|
|Thermal Neutron Triple-Axis with Polarized Beam option (BT7)|
|Disk-Chopper Spectrometer (DCS)|
|MAGIK Off-Specular Reflectometer (MAGIK)|
Small Angle Neutron Scattering with Polarized Beam option (SANS) - 30 m (NG7)
|Small Angle Neutron Scattering (SANS) - 30 m (NGB)|
|Powder Diffractometer (BT1)|
*These instruments are partially supported by the National Science Foundation through its Center for High Resolution Neutron Scattering (CHRNS) at NIST. Publications that result from work on these instruments should include an acknowledgment of CHRNS support (details here).