Author: Belev, G.
Paper Title Page
WEPE16
 High Power Load Monochromator for Computed Tomography Program at BMIT at Energies 25-150 keV  
 
  • T.W. Wysokinski, G. Belev, L.D. Chapman, C.D. Miller
    CLS, Saskatoon, Saskatchewan, Canada
  • N. Huber
    HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
  • M. Renier
    ESRF, Grenoble, France
  • P. Suortti
    Helsinki University, Department of Physics, University of Helsinki, Finland
  
  A high power load monochromator has been constructed for computed tomography (CT) studies at the BioMedical Imaging and Therapy (BMIT) facility located at the Canadian Light Source. A non-dispersive pair of bent Laue-type crystals is used, with the first crystal water-cooled. The monochromator operates at energies from 25 to 150 keV, and the maximum width of the beam is 190 mm at crystal location. The beam intensity is between 1013 and 1014 photons/s/mm2 under typical operating conditions. In normal mode of operation, if the first crystal is bend with 3 N*m and the second crystal with 2 N*m torque, the measured FWHM of the spectral bandwidth at 50 keV is 1%. With the improved design of the holding springs, the monochromator is quite insensitive to vibrations, it can operate with small turbo pump attached for medium resolution imaging at 20-50 keV. Due to high power loads, the system experiences high out-gassing and a proper filter set to protect the crystal and to reduce the thermal drift is required. High level of radiation inside the monochromator vessel is the reason the operation of the system must be based only on mechanical end-switch calibration.  
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WEPE24 Live Animal Imaging Program at Bio-Medical Imaging and Therapy Facility at the Canadian Light Source 348
 
  • M.A. Webb, G. Belev, C.D. Miller, T.W. Wysokinski, N. Zhu
    CLS, Saskatoon, Saskatchewan, Canada
  • M. Gibbons
    University of Saskatchewan, Saskatoon, Canada
  
  The live animal imaging program at the Bio-Medical Imaging and Therapy (BMIT) facility at the Canadian Light Source has been developing for the last 5 years and continues to grow. It is expected to become a large portion of the user activity as numerous groups work towards the goal of live animal studies. Synchrotron-based imaging of live animals is an opportunity for great science that also brings challenges and specific requirements for the experimental end-station. The beamline currently provides basic support and has been improving the facilities available. For example, there have been changes to the lab to allow for longer rodent housing and improved housing during measurements. Remote control of heat lamps and of flow rate for gas anaesthesia allow a veterinarian or animal care worker to make adjustments without interrupting the imaging. Integration of user equipment such as heart/breathing monitoring and ultrasound equipment with the beamline systems can be used for gating control of imaging. Future improvements will be done with consultation with university veterinarians and the user groups.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE24  
About • paper received ※ 10 September 2016       paper accepted ※ 21 September 2016       issue date ※ 22 June 2017  
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WEPE31
 MRT LIFT - a High Accuracy Positioning System for Biomedical Imaging and Therapy Program at BMIT  
 
  • T.W. Wysokinski, G. Belev, M. Bree, L.D. Chapman, C.D. Miller
    CLS, Saskatoon, Saskatchewan, Canada
  • J. Boire
    RMD Engineering Inc., Saskatoon, Canada
  • N. Huber
    HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
  • M. Renier
    ESRF, Grenoble, France
  
  The Microbeam Radiation Therapy (MRT) Lift is a large, high precision, eight stage positioning and scanning system installed at BMIT Facility. In order to guarantee a uniform exposure rate of the sample, the vertical speed of the main stage (Zscan) is constant with <1% error over the 700 mm vertical excursion. It may reach 200 mm/s. The main CT stage (PHI1) can rotate 120 kg load with speed up to 30 rpm. The verified accuracy of the motion is less than 5 Um. Other stages include: Ytrans - horizontal positioning of the vertical rotational axis to the beam, PHI2 - kappa axis used for specimen positioning, PHI3 - rotary axis used for specimen positioning and Xpos, Ypos , Zpos: fine positioning stages. Alignment of the sample using the MRT Lift is a time consuming and challenging task. The BMIT Group has developed a Python-based MRT Lift positioning and control program that uses a combination of computational and iterative methods to independently adjust the sample’s X, Y, Z, pitch and roll positions. Integration with the SolidWorks modelling platform allows high quality renderings of the MRT Lift in its current or proposed position to be displayed in real time.  
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THAA01
 Large (Metre) Scale Positioning Systems for Imaging Program at BMIT  
 
  • T.W. Wysokinski, G. Belev, L.D. Chapman, C.D. Miller
    CLS, Saskatoon, Saskatchewan, Canada
  • J. Boire
    RMD Engineering Inc., Saskatoon, Canada
  • M. Renier
    ESRF, Grenoble, France
  
  The BioMedical Imaging and Therapy (BMIT) facility provides synchrotron-specific imaging and radiation therapy capabilities. We describe here the main mechanical stages on the insertion device (ID) beam-line 05ID-2, with the beam terminated in SOE-1 experimental hutch. The main mechanical components within the second optics hutch (POE-3) are: tiltable optics table that provides support for a set of filters, shutters and ion chambers and a moveable shielding assembly. The table provides 0.24 m vertical travel range and tilt capability of -8° to +13° (with respect to the horizontal) and 200 kg load capacity. Moveable shielding provides 2030 kg load capacity, with vertical travel range of 0.7 m and has two sets of photon/safety shutters, which are required for the KES imaging angle range of +12.3° to -7.3°. SOE-1 hutch is 6 m wide, 5 m tall and 10 m long and accommodates the large animal positioning system (LAPS) capable of positioning and manipulating samples up to 907 kg, over 2.7 m vertical travel range. This end-station also includes a unique camera positioner with a 320 kg load capacity, vertical travel range of 4.9 meters and ability to tilt the stage for KES and DEI modes.  
slides icon Slides THAA01 [38.495 MB]  
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