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@INPROCEEDINGS{Schrader:188517,
author = {Schrader, Tobias Erich},
title = {{B}io{D}iff - a {D}iffractometer{O}ptimized for {C}rystals
with{L}arge {U}nit {C}ells},
reportid = {FZJ-2015-01876},
year = {2014},
abstract = {In recent years many new neutron protein diffractometers
have become operational, e.g. Mandi at SNS, Imagine at HIFR,
BioDiff at MLZ The research reactor Heinz Maier-Leibnitz
(FRM II) is a modern high flux neutron source which feeds
some 30 state of the art neutron beam instruments. Currently
24 are operational, others in commissioning or under
construction. The newly built neutron single crystal
diffractometer BIODIFF is especially designed to collect
data from crystals with large unit cells. The main field of
application is the structural analysis of proteins,
especially the determination of hydrogen atom positions.
BIODIFF is a joint project of the Jülich Centre for Neutron
Science (JCNS) and the FRM II. Typical scientific questions
addressed are the determination of protonation states of
amino acid side chains (see e. g. [1,2]) and the
characterization of the hydrogen bonding network between the
protein active centre and an inhibitor or substrate. BIODIFF
is designed as a monochromatic instrument. By using a highly
orientated pyrolytic graphite monochromator (PG002) the
diffractometer is able to operate in the wavelength range of
2.4 Å to about 5.6 Å. Contaminations of higher order
wavelengths are removed by a neutron velocity selector. To
cover a large solid angle the main detector of BIODIFF
consists of a neutron imaging plate in a cylindrical
geometry with online read-out capability. A fast Li/ZnS
scintillator CCD camera is available for additional
detection abilities. An optical CCD-camera pointing at the
sample position is used to quickly align the crystal with
respect to the neutron beam. The main advantage of BIODIFF
is the possibility to adapt the wavelength to the size of
the unit cell of the sample crystal while operating with a
clean monochromatic beam that keeps the background level
low. BIODIFF is equipped with a standard Oxford Cryosystem
“Cryostream 700+” which allows measurements in the
temperature regime from 90K up to 500K (see Figure
underneath).},
month = {Sep},
date = {2014-09-17},
organization = {15th International Conference on the
Crystallization of Biological
Macromolecules, Hamburg (Germany), 17
Sep 2014 - 20 Sep 2014},
subtyp = {Plenary/Keynote},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)BIODIFF-20140101},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/188517},
}