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R2D2 fast overview Sept. 2014 version

R2D2 fast overview Sept. 2014 version. This document is a short description of the R2D2 test beam line at the JEEPII reactor at IFE, Norway. (Contact: Isabel Llamas Jansa ). Setup: main components. JEEP II reactor. JJ-X ray 30’ collimator. Sample position. He-3 beam monitor. JJ-X ray

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R2D2 fast overview Sept. 2014 version

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  1. R2D2 fast overviewSept. 2014 version This document is a short description of the R2D2 test beam line at the JEEPII reactor at IFE, Norway. (Contact: Isabel Llamas Jansa)

  2. Setup: maincomponents JEEP II reactor JJ-X ray 30’ collimator Sample position He-3 beam monitor JJ-X ray slit monochromator JJ-X ray slit Detector position http://www.ife.no/en/ife/departments/physics/projects/r2d2

  3. Experimental area from above Photo: Isabel Llamas http://www.ife.no/en/ife/departments/physics/projects/r2d2

  4. Descriptionofmovement sample detector Manual screw Jack to move plate where turning tablessit. Used for alignement. Horizontaltranslation and rotationofhorizontal arm aroundtop turning tableaxis. Verticaltranslationof sample and rotationofdetector’stable arm aroundbottom turning tableaxis. The setupallows relative positioningofdetectorwithrespect to sample. Photo: Isabel Llamas http://www.ife.no/en/ife/departments/physics/projects/r2d2

  5. Close up ofsetupwith slits and neutroncamera Photo: Isabel Llamas http://www.ife.no/en/ife/departments/physics/projects/r2d2

  6. Beam properties • The beam flux is of the order of 105 per s cm2 thermal neutrons. • It comes from the reactor through a shutter with two opening positions: full open orSoller collimated. • The collimator in the shutter is made of Cd layers and has a 36’ divergence. • The beam is then monochromated by a composite Ge wafer monochromator, • and exits the shielding at 90 degrees through a 30’ GdSoller collimator inserted in a borated-polyethylene tube. • Two JJ X-Ray IB-C80-AIR slits with borated aluminum blades are placed before the sample position. (400), 2Å (511), 1.54Å Beam monitor / counts per second (711), 1.12Å (822), 0.94Å (911), 0.88Å Rotation Motor /steps Accessible wavelengths via rotation of the monochromator.

  7. Electronics and software • The setup is motor controlled using both commercial and in-house software. • Current NIM Modules include: Canberra high voltage power supplies 3106D, Canberra preamplifiers 2006, Canberra amplifiers 2022, Canberra single channel analyzers 2030. • A MKS multi gas flow meter with a full scale of flow ranges (5 to 50000 sccm) and maximum inlet pressure of 10 bar is also available. • An in-house LabView program is used for detector count acquisition. A CAEN digitizer with software in development is used to acquire PHS. • A HDO4000 High Definition Oscilloscope from Teledyne Lecroy is also used.

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