• Macháček, M.
• Kytýř, D.
• Rada, V.
• Fíla, T.
• Zlámal, P.
• Vavrik, Daniel
• Žemlička, J.

Abstract

<jats:title>Abstract</jats:title><jats:p>X-ray computed tomography is a standard method of non-destructive testing of a wide rangeof static objects. In recent years, time-dependent tomography has been on the rise, for which itis necessary to acquire a series of tomographic data covering the event of interest. For slowerprocesses, conventional laboratory X-ray computed tomography (CT) scanners can be used, while whenevents are faster, a very intense X-ray source is usually required. For high resolutionrequirements, the need for an intense X-ray source leads to the use of a synchrotron. An exceptionis tomographic tracking of periodic events. As will be shown, for these, a good qualityreconstruction can be achieved even in the case of a relatively low-intensity X-ray source. Toavoid blurring of the individual X-ray images by the motion of the object, the exposure time mustbe reasonably short. At motion rates of units of Hz, this time cannot be longer than tens of ms,this requirement naturally leads to low data statistics. Sufficient statistics is achieved byintegrating images taken at an identical position of the moving object. A key requirement of suchan approach is the precise synchronization of all active components of the system. The imagingdetector must be capable of taking images on demand by hardware triggering with the capability ofadequately short exposures. The ability of the CT system to investigate periodically movingobjects will be demonstrated on the object oscillating harmonically at 3.81 Hz.</jats:p>

Topics

• impedance spectroscopy
• tomography
• mass spectrometry