High efficiency multichannel collimator for structural studies of liquids and low-Z materials at high pressures and temperatures

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3551988· OSTI ID:22062254

Morard, G ^[1]; Mezouar, M; Bauchau, S; Garbarino, G ^[2]; Alvarez-Murga, M ^[2]; Hodeau, J -L ^[3]

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1. Institut de Mineralogie et de Physique des Milieux Condenses, UMR CNRS 7590 and Institut de Physique du Globe de Paris, Universite Pierre et Marie Curie, Universite Paris Diderot, 75005 Paris (France)
2. European Synchrotron Radiation Facility, Grenoble F-38043 (France)
3. Institut Neel (India), CNRS UPR 2940, 25 Avenue des Martyrs, BP 166, 38042 Grenoble (France)

A high efficiency multichannel collimator (MCC) device has been developed at the high pressure beamline ID27 of the European Synchrotron Radiation Facility to drastically reduce the x-ray background from the sample environment in the Paris-Edinburgh press. The main technical difficulty, which resides in the minimum slits size achievable using the classical mono-bloc design, has been resolved using an original concept based on a set of independent slits. Then, a very small slit size of 50 {mu}m was manufactured resulting in a great improvement of the signal to background ratio. In addition, the transfer function of the MCC has been measured using the x-ray diffusion signal of a metal doped glass and efficiently applied to correct the raw data. The potential of this new device is illustrated in two challenging examples: iron-sulfur liquid structures and C{sub 60} polymerization process at high pressure and high temperature.

• OSTI ID: 22062254
• Journal Information: Review of Scientific Instruments, Vol. 82, Issue 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
43 PARTICLE ACCELERATORS
COLLIMATORS
DESIGN
DIFFUSION
DOPED MATERIALS
EFFICIENCY
EUROPEAN SYNCHROTRON RADIATION FACILITY
FULLERENES
GLASS
IRON
LIQUIDS
POLYMERIZATION
PRESSURE RANGE MEGA PA 10-100
SULFUR
TEMPERATURE RANGE 0400-1000 K
TRANSFER FUNCTIONS
X RADIATION