D19: a neutron diffractometer for small proteins and chemical crystallography

Vacuum system upgrade for extended Q-range small-angle neutron scattering diffractometer (EQ-SANS) at SNS

The Extended Q-range Small-angle Neutron Scattering Diffractometer (EQ-SANS) instrument at the spallation neutron source (SNS), Oak Ridge, Tennessee, incorporates a 69 m3 detector vessel with a vacuum system which required an upgrade with respect to performance, ease of operation, and maintenance. The upgrade focused on improving pumping performance as well as optimizing system design to minimi...

Neutron crystallography – Then and now *

Neutron crystallography began to be employed at the Bhabha Atomic Research Centre (BARC), Trombay, Mumbai in the early sixties. At that time, the technique, at BARC as well as elsewhere, was in a nascent state, with emphasis on building of instruments and development of crystallography software. Over the years, the Trombay group kept pace with the advancements in other parts of world and employ...

Chemical Crystallography

Synchrotron and neutron techniques in biological crystallography.

Synchrotron radiation (SR) techniques are continuously pushing the frontiers of wavelength range usage, smaller crystal sample size, larger protein molecular weight and complexity, as well as better diffraction resolution. The new research specialism of probing functional states directly in crystals, via time-resolved Laue and freeze trapping structural studies, has been developed, with a range...

KWS-2, the high intensity / wide Q-range small-angle neutron diffractometer for soft-matter and biology at FRM II

The KWS-2 small-angle neutron diffractometer operated by JCNS at FRM II is upgraded and optimized towards high intensity and wide Q-range studies of mesoscopic structures and structural changes due to rapid kinetics and becomes a dedicated SANS instrument to soft-matter and biology. The high intensity permits fast measurement of small or weak scattering samples and time resolved structural stud...