APRIL 2019 Call
The next deadline for receipt of proposals is Tuesday, April 16, 2019
- WEB PAGE PROPOSAL FORM
- PROPOSAL INSTRUCTIONS including TIPS ON PROPOSAL WRITING
- PROPOSAL REVIEW AND BEAM TIME ALLOCATION
- OBTAINING SITE ACCESS
The NIST Center for Neutron Research (NCNR) offers neutron scattering and chemical analysis instruments to all qualified users. All proposals will be critically reviewed for scientific merit by experts external to the NCNR.
For this proposal round:
PROPOSAL SUBMISSION FORM
You must have an account on the new NCNR Information Management System (NCNR-IMS) to submit a proposal. Go to the login link on the upper left hand side of our home page. Login if you have an account, or create an account if you do not. Your email address is your user ID. It may be that you may already have an account of which you are unaware. You will know this if you try to create an account referring to an existing account with the same email address. We can send you your password in the latter case, or if you have forgotten your password. PLEASE do not create duplicate or mutiple accounts.
NOTE! MAIL-IN SAMPLES FOR POWDER DIFFRACTION
We will accept proposals for experiments on the BT1 powder diffractometer on "mail-in" samples. That is, for approved proposals, samples may be mailed to NCNR staff, who will execute the data collection. Up to 25% of BT1 instrument time may be allocated to such proposals. NOTE THAT ONLY SUCH MAIL-IN PROPOSALS ARE ACCEPTED FOR BT1.
UPLOAD A PDF document of the description of your experiment on our proposal form.
The new feature allows you conveniently to include figures and equations. The uploaded material may be no larger than 1500 kb in file size, nor longer than 3 letter-size pages in length. The font size must be 12 point or larger.
TIPS ON PROPOSAL WRITING
The BTAC recommends that applicants read the tips listed on the proposal instructions page, with new specific suggestions from the SANS subcommitee of the BTAC.
EQUATIONS AND SPECIAL CHARACTERS -- NOTE CHANGE
In order to include special characters and equations, you must use the option of uploading the description of experiment as a pdf file. NOTE that the text box option no longer supports special characters, since no version of the proposal that reviewers will see is formatted in html.
PROPOSAL LENGTH LIMIT
The experiment description must be uploaded as a pdf file. The latter should include any figures and may not be longer than 3 letter-size pages, nor larger than 1500 kb in file size.
In the current call for proposals, the following instruments are offered to applicants.
- Instruments supported by the Center for High Resolution Neutron Scattering
- CHRNS Small Angle Neutron Scattering Instrument (SANS) - 30m (NGB)
- CHRNS Ultra-Small Angle Neutron Scattering Instrument (uSANS)
- CHRNS High-Flux Backscattering Spectrometer (HFBS)
- CHRNS Neutron Spin-Echo Spectrometer (NSE)
- CHRNS Multi-Angle Crystal Spectrometer (MACS)
- CHRNS Very-Small Angle Neutron Scattering Instrument (vSANS)*
- Other Instruments
*The brand new vSANS instrument is currently being commissioned. This means that it is not fully functional. In particular we are having issues with the high resolution detector. Thus we not confidant that the extended low-Q range will be available in this proposal round. In addition we are still fixing a variety of small problems. Thus, we are offering 75 days instead of the eventual 90 days so that sufficient time is available to complete the commissioning and solve any additional problems as they are found. By applying for this time, you are agreeing to help with commissioning by testing the instrument and providing feedback so that we can ensure reliable service in the future.
Currently, the instrument works very well as a SANS instrument. In other words, it covers essentially the same Q-range as our current 30 m SANS machines. Unlike our other SANS instruments, vSANS has 2 detectors each with about 3 times the area of our old detectors allowing a wider Q-range in a single measurement. There are also 3 options for wavelength spread: 3% (λ = 0.475 nm), 13% (variable λ using a velocity selector), and 30% (λ ≈ 0.5 nm). Polarized beam and polarization analysis are also available. All SANS sample environments with the exception of the 9 T horizontal field magnet can be used on vSANS.
If you would like more detailed information about the NCNR instruments than is given on these pages, please contact the appropriate instrument scientist.