Speaker
Description
The VENUS hyperspectral imaging beamline is currently being commissioned at the Oak Ridge National Laboratory Spallation Neutron Source after several years of construction. The beamline provides collimation ratios varying from 400 to 2000. It is equipped with choppers, a cadmium filter, and two collimators to reduce background in the instrument cave. While the flight tubes located in the front-end are evacuated, the cave flight tubes are filled with helium to minimize the thickness of the aluminum window near the sample area. VENUS is optimized for Bragg edge and resonance imaging, with a 20 x 20 and 4 x 4 cm2 field-of-view, respectively. VENUS is equipped with three detectors: the ANDOR charge-coupled device (CCD) iKon-XL 230, the QHY scientific Complementary Metal Oxide Semiconductor (sCMOS) sensor 6060, the microchannel plate Timepix detector (with a maximum field-of-view of 2.8 x 2.8 cm2). A microchannel plate Timepix 3 detector is also being commissioned. Figure 1 displays the general layout of the beamline with the front-end area (where optical components, the filter, and choppers are located), the cave and beam stop, the radiological materials area (RMA), and the control hutch. During routine operations, the cave, RMA and control hutch are accessible.
The instrument commissioning focuses on the performance of the beamline components, the study of the moderator, the acquisition and data workflows, calibration measurements, and early scientific results. Some of these preliminary results are presented here.
| Abstract Topic | Design, construction, and operation of existing and upcoming instrumentation |
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